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components/serial_sync/CMakeLists.txt

@@ -0,0 +1,18 @@
+set(srcs
+    "protobuf/nanopb/pb_common.c"
+    "protobuf/nanopb/pb_decode.c"
+    "protobuf/nanopb/pb_encode.c"
+    "protobuf/LoToHi.pb.c"
+    "protobuf/HiToLo.pb.c"
+    "src/sync_slave.c"
+    "src/sync_master.c"
+    )
+
+
+idf_component_register(SRCS "${srcs}"
+                    INCLUDE_DIRS "include" "protobuf"
+                    PRIV_REQUIRES driver esp_timer
+                    REQUIRES config evse currentshaper)
+
+
+

components/serial_sync/include/sync_master.h

@@ -0,0 +1,23 @@
+#ifndef SYNC_MASTER_H_
+#define SYNC_MASTER_H_
+
+
+/**
+ * @brief Send Grid Current
+ * 
+ */
+void send_grid_current(uint32_t grid_current);
+
+/**
+ * @brief Start master SYNC
+ * 
+ */
+void master_sync_start();
+
+/**
+ * @brief Stop master SYNC
+ * 
+ */
+void master_sync_stop(void);
+
+#endif /* SYNC_MASTER_H_ */

components/serial_sync/include/sync_slave.h

@@ -0,0 +1,18 @@
+#ifndef SYNC_SLAVE_H_
+#define SYNC_SLAVE_H_
+
+
+/**
+ * @brief Start slave SYNC
+ * 
+ */
+void slave_sync_start();
+
+
+/**
+ * @brief Stop slave SYNC
+ * 
+ */
+void slave_sync_stop(void);
+
+#endif /* SYNC_SLAVE_H_ */

components/serial_sync/protobuf/HiToLo.pb.c

@@ -0,0 +1,12 @@
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.4.9-dev */
+
+#include "HiToLo.pb.h"
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+PB_BIND(HiToLo, HiToLo, AUTO)
+
+
+

components/serial_sync/protobuf/HiToLo.pb.h

@@ -0,0 +1,70 @@
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.4.9-dev */
+
+#ifndef PB_HITOLO_PB_H_INCLUDED
+#define PB_HITOLO_PB_H_INCLUDED
+#include <nanopb/pb.h>
+
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+/* Struct definitions */
+/* This container message is send from Hi To Lo and may contain any allowed message in that direction. */
+typedef struct _HiToLo {
+    pb_size_t which_payload;
+    union {
+        uint32_t time_stamp;
+        bool connector_lock; /* false: unlock, true: lock */
+        uint32_t max_charging_current;
+        bool allow_power_on;
+        bool reset;
+        uint32_t grid_current;
+        uint32_t max_grid_current;
+    } payload;
+} HiToLo;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Initializer values for message structs */
+#define HiToLo_init_default                      {0, {0}}
+#define HiToLo_init_zero                         {0, {0}}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define HiToLo_time_stamp_tag                    1
+#define HiToLo_connector_lock_tag                2
+#define HiToLo_max_charging_current_tag          3
+#define HiToLo_allow_power_on_tag                4
+#define HiToLo_reset_tag                         5
+#define HiToLo_grid_current_tag                  6
+#define HiToLo_max_grid_current_tag              7
+
+/* Struct field encoding specification for nanopb */
+#define HiToLo_FIELDLIST(X, a) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,time_stamp,payload.time_stamp),   1) \
+X(a, STATIC,   ONEOF,    BOOL,     (payload,connector_lock,payload.connector_lock),   2) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,max_charging_current,payload.max_charging_current),   3) \
+X(a, STATIC,   ONEOF,    BOOL,     (payload,allow_power_on,payload.allow_power_on),   4) \
+X(a, STATIC,   ONEOF,    BOOL,     (payload,reset,payload.reset),   5) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,grid_current,payload.grid_current),   6) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,max_grid_current,payload.max_grid_current),   7)
+#define HiToLo_CALLBACK NULL
+#define HiToLo_DEFAULT NULL
+
+extern const pb_msgdesc_t HiToLo_msg;
+
+/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
+#define HiToLo_fields &HiToLo_msg
+
+/* Maximum encoded size of messages (where known) */
+#define HITOLO_PB_H_MAX_SIZE                     HiToLo_size
+#define HiToLo_size                              6
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

components/serial_sync/protobuf/HiToLo.proto

@@ -0,0 +1,16 @@
+syntax = "proto3";
+
+/*
+ This container message is send from Hi To Lo and may contain any allowed message in that direction.
+*/
+message HiToLo {
+ oneof payload {
+    uint32 time_stamp = 1;
+    bool connector_lock = 2; // false: unlock, true: lock
+    uint32 max_charging_current = 3;
+    bool allow_power_on = 4;
+    bool reset = 5;
+    uint32 grid_current = 6;
+    uint32 max_grid_current = 7;
+  }
+}

components/serial_sync/protobuf/LoToHi.pb.c

@@ -0,0 +1,21 @@
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.4.9-dev */
+
+#include "LoToHi.pb.h"
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+PB_BIND(LoToHi, LoToHi, AUTO)
+
+
+PB_BIND(ErrorFlags, ErrorFlags, AUTO)
+
+
+PB_BIND(PowerMeter, PowerMeter, AUTO)
+
+
+
+
+
+

components/serial_sync/protobuf/LoToHi.pb.h

@@ -0,0 +1,237 @@
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.4.9-dev */
+
+#ifndef PB_LOTOHI_PB_H_INCLUDED
+#define PB_LOTOHI_PB_H_INCLUDED
+#include <nanopb/pb.h>
+
+#if PB_PROTO_HEADER_VERSION != 40
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+/* Enum definitions */
+typedef enum _CpState {
+    CpState_EVSE_STATE_A = 0,
+    CpState_EVSE_STATE_B1 = 1,
+    CpState_EVSE_STATE_B2 = 2,
+    CpState_EVSE_STATE_C1 = 3,
+    CpState_EVSE_STATE_C2 = 4,
+    CpState_EVSE_STATE_D1 = 5,
+    CpState_EVSE_STATE_D2 = 6,
+    CpState_EVSE_STATE_E = 7,
+    CpState_EVSE_STATE_F = 8
+} CpState;
+
+typedef enum _PpState {
+    PpState_STATE_NC = 0,
+    PpState_STATE_13A = 1,
+    PpState_STATE_20A = 2,
+    PpState_STATE_32A = 3,
+    PpState_STATE_70A = 4,
+    PpState_STATE_FAULT = 5
+} PpState;
+
+typedef enum _LockState {
+    LockState_UNDEFINED = 0,
+    LockState_UNLOCKED = 1,
+    LockState_LOCKED = 2
+} LockState;
+
+/* Struct definitions */
+typedef struct _ErrorFlags {
+    bool diode_fault;
+    bool rcd_selftest_failed;
+    bool rcd_triggered;
+    bool ventilation_not_available;
+    bool connector_lock_failed;
+    bool cp_signal_fault;
+} ErrorFlags;
+
+typedef struct _PowerMeter {
+    uint32_t time_stamp;
+    float vrmsL1;
+    float vrmsL2;
+    float vrmsL3;
+    float irmsL1;
+    float irmsL2;
+    float irmsL3;
+    float irmsN;
+    float wattHrL1;
+    float wattHrL2;
+    float wattHrL3;
+    float totalWattHr;
+    float tempL1;
+    float tempL2;
+    float tempL3;
+    float tempN;
+    float wattL1;
+    float wattL2;
+    float wattL3;
+    float freqL1;
+    float freqL2;
+    float freqL3;
+    bool phaseSeqError;
+} PowerMeter;
+
+/* This container message is send from Lo To Hi and may contain any allowed message in that direction. */
+typedef struct _LoToHi {
+    pb_size_t which_payload;
+    union {
+        uint32_t time_stamp;
+        bool relais_state; /* false: relais are off, true: relais are on */
+        ErrorFlags error_flags;
+        CpState cp_state;
+        PpState pp_state;
+        uint32_t max_charging_current;
+        uint32_t max_grid_current;
+        LockState lock_state;
+        PowerMeter power_meter;
+    } payload;
+} LoToHi;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Helper constants for enums */
+#define _CpState_MIN CpState_EVSE_STATE_A
+#define _CpState_MAX CpState_EVSE_STATE_F
+#define _CpState_ARRAYSIZE ((CpState)(CpState_EVSE_STATE_F+1))
+
+#define _PpState_MIN PpState_STATE_NC
+#define _PpState_MAX PpState_STATE_FAULT
+#define _PpState_ARRAYSIZE ((PpState)(PpState_STATE_FAULT+1))
+
+#define _LockState_MIN LockState_UNDEFINED
+#define _LockState_MAX LockState_LOCKED
+#define _LockState_ARRAYSIZE ((LockState)(LockState_LOCKED+1))
+
+#define LoToHi_payload_cp_state_ENUMTYPE CpState
+#define LoToHi_payload_pp_state_ENUMTYPE PpState
+#define LoToHi_payload_lock_state_ENUMTYPE LockState
+
+
+
+
+/* Initializer values for message structs */
+#define LoToHi_init_default                      {0, {0}}
+#define ErrorFlags_init_default                  {0, 0, 0, 0, 0, 0}
+#define PowerMeter_init_default                  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+#define LoToHi_init_zero                         {0, {0}}
+#define ErrorFlags_init_zero                     {0, 0, 0, 0, 0, 0}
+#define PowerMeter_init_zero                     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define ErrorFlags_diode_fault_tag               1
+#define ErrorFlags_rcd_selftest_failed_tag       2
+#define ErrorFlags_rcd_triggered_tag             3
+#define ErrorFlags_ventilation_not_available_tag 4
+#define ErrorFlags_connector_lock_failed_tag     5
+#define ErrorFlags_cp_signal_fault_tag           6
+#define PowerMeter_time_stamp_tag                1
+#define PowerMeter_vrmsL1_tag                    2
+#define PowerMeter_vrmsL2_tag                    3
+#define PowerMeter_vrmsL3_tag                    4
+#define PowerMeter_irmsL1_tag                    5
+#define PowerMeter_irmsL2_tag                    6
+#define PowerMeter_irmsL3_tag                    7
+#define PowerMeter_irmsN_tag                     8
+#define PowerMeter_wattHrL1_tag                  9
+#define PowerMeter_wattHrL2_tag                  10
+#define PowerMeter_wattHrL3_tag                  11
+#define PowerMeter_totalWattHr_tag               12
+#define PowerMeter_tempL1_tag                    13
+#define PowerMeter_tempL2_tag                    14
+#define PowerMeter_tempL3_tag                    15
+#define PowerMeter_tempN_tag                     16
+#define PowerMeter_wattL1_tag                    17
+#define PowerMeter_wattL2_tag                    18
+#define PowerMeter_wattL3_tag                    19
+#define PowerMeter_freqL1_tag                    20
+#define PowerMeter_freqL2_tag                    21
+#define PowerMeter_freqL3_tag                    22
+#define PowerMeter_phaseSeqError_tag             23
+#define LoToHi_time_stamp_tag                    1
+#define LoToHi_relais_state_tag                  2
+#define LoToHi_error_flags_tag                   3
+#define LoToHi_cp_state_tag                      4
+#define LoToHi_pp_state_tag                      5
+#define LoToHi_max_charging_current_tag          6
+#define LoToHi_max_grid_current_tag              7
+#define LoToHi_lock_state_tag                    8
+#define LoToHi_power_meter_tag                   9
+
+/* Struct field encoding specification for nanopb */
+#define LoToHi_FIELDLIST(X, a) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,time_stamp,payload.time_stamp),   1) \
+X(a, STATIC,   ONEOF,    BOOL,     (payload,relais_state,payload.relais_state),   2) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,error_flags,payload.error_flags),   3) \
+X(a, STATIC,   ONEOF,    UENUM,    (payload,cp_state,payload.cp_state),   4) \
+X(a, STATIC,   ONEOF,    UENUM,    (payload,pp_state,payload.pp_state),   5) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,max_charging_current,payload.max_charging_current),   6) \
+X(a, STATIC,   ONEOF,    UINT32,   (payload,max_grid_current,payload.max_grid_current),   7) \
+X(a, STATIC,   ONEOF,    UENUM,    (payload,lock_state,payload.lock_state),   8) \
+X(a, STATIC,   ONEOF,    MESSAGE,  (payload,power_meter,payload.power_meter),   9)
+#define LoToHi_CALLBACK NULL
+#define LoToHi_DEFAULT NULL
+#define LoToHi_payload_error_flags_MSGTYPE ErrorFlags
+#define LoToHi_payload_power_meter_MSGTYPE PowerMeter
+
+#define ErrorFlags_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, BOOL,     diode_fault,       1) \
+X(a, STATIC,   SINGULAR, BOOL,     rcd_selftest_failed,   2) \
+X(a, STATIC,   SINGULAR, BOOL,     rcd_triggered,     3) \
+X(a, STATIC,   SINGULAR, BOOL,     ventilation_not_available,   4) \
+X(a, STATIC,   SINGULAR, BOOL,     connector_lock_failed,   5) \
+X(a, STATIC,   SINGULAR, BOOL,     cp_signal_fault,   6)
+#define ErrorFlags_CALLBACK NULL
+#define ErrorFlags_DEFAULT NULL
+
+#define PowerMeter_FIELDLIST(X, a) \
+X(a, STATIC,   SINGULAR, UINT32,   time_stamp,        1) \
+X(a, STATIC,   SINGULAR, FLOAT,    vrmsL1,            2) \
+X(a, STATIC,   SINGULAR, FLOAT,    vrmsL2,            3) \
+X(a, STATIC,   SINGULAR, FLOAT,    vrmsL3,            4) \
+X(a, STATIC,   SINGULAR, FLOAT,    irmsL1,            5) \
+X(a, STATIC,   SINGULAR, FLOAT,    irmsL2,            6) \
+X(a, STATIC,   SINGULAR, FLOAT,    irmsL3,            7) \
+X(a, STATIC,   SINGULAR, FLOAT,    irmsN,             8) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattHrL1,          9) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattHrL2,         10) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattHrL3,         11) \
+X(a, STATIC,   SINGULAR, FLOAT,    totalWattHr,      12) \
+X(a, STATIC,   SINGULAR, FLOAT,    tempL1,           13) \
+X(a, STATIC,   SINGULAR, FLOAT,    tempL2,           14) \
+X(a, STATIC,   SINGULAR, FLOAT,    tempL3,           15) \
+X(a, STATIC,   SINGULAR, FLOAT,    tempN,            16) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattL1,           17) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattL2,           18) \
+X(a, STATIC,   SINGULAR, FLOAT,    wattL3,           19) \
+X(a, STATIC,   SINGULAR, FLOAT,    freqL1,           20) \
+X(a, STATIC,   SINGULAR, FLOAT,    freqL2,           21) \
+X(a, STATIC,   SINGULAR, FLOAT,    freqL3,           22) \
+X(a, STATIC,   SINGULAR, BOOL,     phaseSeqError,    23)
+#define PowerMeter_CALLBACK NULL
+#define PowerMeter_DEFAULT NULL
+
+extern const pb_msgdesc_t LoToHi_msg;
+extern const pb_msgdesc_t ErrorFlags_msg;
+extern const pb_msgdesc_t PowerMeter_msg;
+
+/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
+#define LoToHi_fields &LoToHi_msg
+#define ErrorFlags_fields &ErrorFlags_msg
+#define PowerMeter_fields &PowerMeter_msg
+
+/* Maximum encoded size of messages (where known) */
+#define ErrorFlags_size                          12
+#define LOTOHI_PB_H_MAX_SIZE                     LoToHi_size
+#define LoToHi_size                              123
+#define PowerMeter_size                          121
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

components/serial_sync/protobuf/LoToHi.proto

@@ -0,0 +1,80 @@
+syntax = "proto3";
+
+/*
+ This container message is send from Lo To Hi and may contain any allowed message in that direction.
+*/
+message LoToHi {
+ oneof payload {
+  uint32 time_stamp = 1;
+  bool relais_state = 2; // false: relais are off, true: relais are on
+  ErrorFlags error_flags = 3;
+  CpState cp_state = 4;
+  PpState pp_state = 5;
+  uint32 max_charging_current = 6;
+  uint32 max_grid_current = 7;
+  LockState lock_state = 8;
+  PowerMeter power_meter = 9;
+ }
+}
+
+message ErrorFlags {
+  bool diode_fault = 1;
+  bool rcd_selftest_failed = 2;
+  bool rcd_triggered = 3;
+  bool ventilation_not_available = 4;
+  bool connector_lock_failed = 5;
+  bool cp_signal_fault = 6;
+}
+
+enum CpState {
+  EVSE_STATE_A = 0;
+  EVSE_STATE_B1 = 1;
+  EVSE_STATE_B2 = 2;
+  EVSE_STATE_C1 = 3;
+  EVSE_STATE_C2 = 4;
+  EVSE_STATE_D1 = 5;
+  EVSE_STATE_D2 = 6;
+  EVSE_STATE_E = 7;
+  EVSE_STATE_F = 8;
+}
+
+enum PpState {
+  STATE_NC = 0;
+  STATE_13A = 1;
+  STATE_20A = 2;
+  STATE_32A = 3;
+  STATE_70A = 4;
+  STATE_FAULT = 5;
+}
+
+enum LockState {
+  UNDEFINED = 0;
+  UNLOCKED = 1;
+  LOCKED = 2;
+}
+
+message PowerMeter {
+  uint32 time_stamp = 1;
+  float vrmsL1 = 2;
+  float vrmsL2 = 3;
+  float vrmsL3 = 4;
+  float irmsL1 = 5;
+  float irmsL2 = 6;
+  float irmsL3 = 7;
+  float irmsN = 8;
+  float wattHrL1 = 9;
+  float wattHrL2 = 10;
+  float wattHrL3 = 11;
+  float totalWattHr = 12;
+  float tempL1 = 13;
+  float tempL2 = 14;
+  float tempL3 = 15;
+  float tempN = 16;
+  float wattL1 = 17;
+  float wattL2 = 18;
+  float wattL3 = 19;
+  float freqL1 = 20;
+  float freqL2 = 21;
+  float freqL3 = 22;
+  bool phaseSeqError = 23;
+}

components/serial_sync/protobuf/generate_nanopb.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+/home/ricar/Transferências/nanopb-master/generator/nanopb_generator.py -L "#include <nanopb/%s>" -I . -D . LoToHi.proto HiToLo.proto

components/serial_sync/protobuf/generate_version_h.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+VERSION=$(git describe --dirty --always --tags)
+echo "#ifndef _VERSION_AUTOGEN_H_" > ../Yeti/Inc/version_autogen.h
+echo "#define _VERSION_AUTOGEN_H_" >> ../Yeti/Inc/version_autogen.h
+echo "#define VERSION_STRING \"$VERSION\"" >> ../Yeti/Inc/version_autogen.h
+echo "#endif" >> ../Yeti/Inc/version_autogen.h

components/serial_sync/protobuf/nanopb/pb.h

@@ -0,0 +1,875 @@
+/* Common parts of the nanopb library. Most of these are quite low-level
+ * stuff. For the high-level interface, see pb_encode.h and pb_decode.h.
+ */
+
+#ifndef PB_H_INCLUDED
+#define PB_H_INCLUDED
+
+/*****************************************************************
+ * Nanopb compilation time options. You can change these here by *
+ * uncommenting the lines, or on the compiler command line.      *
+ *****************************************************************/
+
+/* Enable support for dynamically allocated fields */
+/* #define PB_ENABLE_MALLOC 1 */
+
+/* Define this if your CPU / compiler combination does not support
+ * unaligned memory access to packed structures. */
+/* #define PB_NO_PACKED_STRUCTS 1 */
+
+/* Increase the number of required fields that are tracked.
+ * A compiler warning will tell if you need this. */
+/* #define PB_MAX_REQUIRED_FIELDS 256 */
+
+/* Add support for tag numbers > 65536 and fields larger than 65536 bytes. */
+/* #define PB_FIELD_32BIT 1 */
+
+/* Disable support for error messages in order to save some code space. */
+/* #define PB_NO_ERRMSG 1 */
+
+/* Disable support for custom streams (support only memory buffers). */
+/* #define PB_BUFFER_ONLY 1 */
+
+/* Disable support for 64-bit datatypes, for compilers without int64_t
+   or to save some code space. */
+/* #define PB_WITHOUT_64BIT 1 */
+
+/* Don't encode scalar arrays as packed. This is only to be used when
+ * the decoder on the receiving side cannot process packed scalar arrays.
+ * Such example is older protobuf.js. */
+/* #define PB_ENCODE_ARRAYS_UNPACKED 1 */
+
+/* Enable conversion of doubles to floats for platforms that do not
+ * support 64-bit doubles. Most commonly AVR. */
+/* #define PB_CONVERT_DOUBLE_FLOAT 1 */
+
+/* Check whether incoming strings are valid UTF-8 sequences. Slows down
+ * the string processing slightly and slightly increases code size. */
+/* #define PB_VALIDATE_UTF8 1 */
+
+/******************************************************************
+ * You usually don't need to change anything below this line.     *
+ * Feel free to look around and use the defined macros, though.   *
+ ******************************************************************/
+
+
+/* Version of the nanopb library. Just in case you want to check it in
+ * your own program. */
+#define NANOPB_VERSION nanopb-0.4.5
+
+/* Include all the system headers needed by nanopb. You will need the
+ * definitions of the following:
+ * - strlen, memcpy, memset functions
+ * - [u]int_least8_t, uint_fast8_t, [u]int_least16_t, [u]int32_t, [u]int64_t
+ * - size_t
+ * - bool
+ *
+ * If you don't have the standard header files, you can instead provide
+ * a custom header that defines or includes all this. In that case,
+ * define PB_SYSTEM_HEADER to the path of this file.
+ */
+#ifdef PB_SYSTEM_HEADER
+#include PB_SYSTEM_HEADER
+#else
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <string.h>
+#include <limits.h>
+
+#ifdef PB_ENABLE_MALLOC
+#include <stdlib.h>
+#endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Macro for defining packed structures (compiler dependent).
+ * This just reduces memory requirements, but is not required.
+ */
+#if defined(PB_NO_PACKED_STRUCTS)
+    /* Disable struct packing */
+#   define PB_PACKED_STRUCT_START
+#   define PB_PACKED_STRUCT_END
+#   define pb_packed
+#elif defined(__GNUC__) || defined(__clang__)
+    /* For GCC and clang */
+#   define PB_PACKED_STRUCT_START
+#   define PB_PACKED_STRUCT_END
+#   define pb_packed __attribute__((packed))
+#elif defined(__ICCARM__) || defined(__CC_ARM)
+    /* For IAR ARM and Keil MDK-ARM compilers */
+#   define PB_PACKED_STRUCT_START _Pragma("pack(push, 1)")
+#   define PB_PACKED_STRUCT_END _Pragma("pack(pop)")
+#   define pb_packed
+#elif defined(_MSC_VER) && (_MSC_VER >= 1500)
+    /* For Microsoft Visual C++ */
+#   define PB_PACKED_STRUCT_START __pragma(pack(push, 1))
+#   define PB_PACKED_STRUCT_END __pragma(pack(pop))
+#   define pb_packed
+#else
+    /* Unknown compiler */
+#   define PB_PACKED_STRUCT_START
+#   define PB_PACKED_STRUCT_END
+#   define pb_packed
+#endif
+
+/* Handly macro for suppressing unreferenced-parameter compiler warnings. */
+#ifndef PB_UNUSED
+#define PB_UNUSED(x) (void)(x)
+#endif
+
+/* Harvard-architecture processors may need special attributes for storing
+ * field information in program memory. */
+#ifndef PB_PROGMEM
+#ifdef __AVR__
+#include <avr/pgmspace.h>
+#define PB_PROGMEM             PROGMEM
+#define PB_PROGMEM_READU32(x)  pgm_read_dword(&x)
+#else
+#define PB_PROGMEM
+#define PB_PROGMEM_READU32(x)  (x)
+#endif
+#endif
+
+/* Compile-time assertion, used for checking compatible compilation options.
+ * If this does not work properly on your compiler, use
+ * #define PB_NO_STATIC_ASSERT to disable it.
+ *
+ * But before doing that, check carefully the error message / place where it
+ * comes from to see if the error has a real cause. Unfortunately the error
+ * message is not always very clear to read, but you can see the reason better
+ * in the place where the PB_STATIC_ASSERT macro was called.
+ */
+#ifndef PB_NO_STATIC_ASSERT
+#  ifndef PB_STATIC_ASSERT
+#    if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+       /* C11 standard _Static_assert mechanism */
+#      define PB_STATIC_ASSERT(COND,MSG) _Static_assert(COND,#MSG);
+#    else
+       /* Classic negative-size-array static assert mechanism */
+#      define PB_STATIC_ASSERT(COND,MSG) typedef char PB_STATIC_ASSERT_MSG(MSG, __LINE__, __COUNTER__)[(COND)?1:-1];
+#      define PB_STATIC_ASSERT_MSG(MSG, LINE, COUNTER) PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER)
+#      define PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER) pb_static_assertion_##MSG##_##LINE##_##COUNTER
+#    endif
+#  endif
+#else
+   /* Static asserts disabled by PB_NO_STATIC_ASSERT */
+#  define PB_STATIC_ASSERT(COND,MSG)
+#endif
+
+/* Number of required fields to keep track of. */
+#ifndef PB_MAX_REQUIRED_FIELDS
+#define PB_MAX_REQUIRED_FIELDS 64
+#endif
+
+#if PB_MAX_REQUIRED_FIELDS < 64
+#error You should not lower PB_MAX_REQUIRED_FIELDS from the default value (64).
+#endif
+
+#ifdef PB_WITHOUT_64BIT
+#ifdef PB_CONVERT_DOUBLE_FLOAT
+/* Cannot use doubles without 64-bit types */
+#undef PB_CONVERT_DOUBLE_FLOAT
+#endif
+#endif
+
+/* List of possible field types. These are used in the autogenerated code.
+ * Least-significant 4 bits tell the scalar type
+ * Most-significant 4 bits specify repeated/required/packed etc.
+ */
+
+typedef uint_least8_t pb_type_t;
+
+/**** Field data types ****/
+
+/* Numeric types */
+#define PB_LTYPE_BOOL    0x00U /* bool */
+#define PB_LTYPE_VARINT  0x01U /* int32, int64, enum, bool */
+#define PB_LTYPE_UVARINT 0x02U /* uint32, uint64 */
+#define PB_LTYPE_SVARINT 0x03U /* sint32, sint64 */
+#define PB_LTYPE_FIXED32 0x04U /* fixed32, sfixed32, float */
+#define PB_LTYPE_FIXED64 0x05U /* fixed64, sfixed64, double */
+
+/* Marker for last packable field type. */
+#define PB_LTYPE_LAST_PACKABLE 0x05U
+
+/* Byte array with pre-allocated buffer.
+ * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
+#define PB_LTYPE_BYTES 0x06U
+
+/* String with pre-allocated buffer.
+ * data_size is the maximum length. */
+#define PB_LTYPE_STRING 0x07U
+
+/* Submessage
+ * submsg_fields is pointer to field descriptions */
+#define PB_LTYPE_SUBMESSAGE 0x08U
+
+/* Submessage with pre-decoding callback
+ * The pre-decoding callback is stored as pb_callback_t right before pSize.
+ * submsg_fields is pointer to field descriptions */
+#define PB_LTYPE_SUBMSG_W_CB 0x09U
+
+/* Extension pseudo-field
+ * The field contains a pointer to pb_extension_t */
+#define PB_LTYPE_EXTENSION 0x0AU
+
+/* Byte array with inline, pre-allocated byffer.
+ * data_size is the length of the inline, allocated buffer.
+ * This differs from PB_LTYPE_BYTES by defining the element as
+ * pb_byte_t[data_size] rather than pb_bytes_array_t. */
+#define PB_LTYPE_FIXED_LENGTH_BYTES 0x0BU
+
+/* Number of declared LTYPES */
+#define PB_LTYPES_COUNT 0x0CU
+#define PB_LTYPE_MASK 0x0FU
+
+/**** Field repetition rules ****/
+
+#define PB_HTYPE_REQUIRED 0x00U
+#define PB_HTYPE_OPTIONAL 0x10U
+#define PB_HTYPE_SINGULAR 0x10U
+#define PB_HTYPE_REPEATED 0x20U
+#define PB_HTYPE_FIXARRAY 0x20U
+#define PB_HTYPE_ONEOF    0x30U
+#define PB_HTYPE_MASK     0x30U
+
+/**** Field allocation types ****/
+ 
+#define PB_ATYPE_STATIC   0x00U
+#define PB_ATYPE_POINTER  0x80U
+#define PB_ATYPE_CALLBACK 0x40U
+#define PB_ATYPE_MASK     0xC0U
+
+#define PB_ATYPE(x) ((x) & PB_ATYPE_MASK)
+#define PB_HTYPE(x) ((x) & PB_HTYPE_MASK)
+#define PB_LTYPE(x) ((x) & PB_LTYPE_MASK)
+#define PB_LTYPE_IS_SUBMSG(x) (PB_LTYPE(x) == PB_LTYPE_SUBMESSAGE || \
+                               PB_LTYPE(x) == PB_LTYPE_SUBMSG_W_CB)
+
+/* Data type used for storing sizes of struct fields
+ * and array counts.
+ */
+#if defined(PB_FIELD_32BIT)
+    typedef uint32_t pb_size_t;
+    typedef int32_t pb_ssize_t;
+#else
+    typedef uint_least16_t pb_size_t;
+    typedef int_least16_t pb_ssize_t;
+#endif
+#define PB_SIZE_MAX ((pb_size_t)-1)
+
+/* Data type for storing encoded data and other byte streams.
+ * This typedef exists to support platforms where uint8_t does not exist.
+ * You can regard it as equivalent on uint8_t on other platforms.
+ */
+typedef uint_least8_t pb_byte_t;
+
+/* Forward declaration of struct types */
+typedef struct pb_istream_s pb_istream_t;
+typedef struct pb_ostream_s pb_ostream_t;
+typedef struct pb_field_iter_s pb_field_iter_t;
+
+/* This structure is used in auto-generated constants
+ * to specify struct fields.
+ */
+typedef struct pb_msgdesc_s pb_msgdesc_t;
+struct pb_msgdesc_s {
+    const uint32_t *field_info;
+    const pb_msgdesc_t * const * submsg_info;
+    const pb_byte_t *default_value;
+
+    bool (*field_callback)(pb_istream_t *istream, pb_ostream_t *ostream, const pb_field_iter_t *field);
+
+    pb_size_t field_count;
+    pb_size_t required_field_count;
+    pb_size_t largest_tag;
+};
+
+/* Iterator for message descriptor */
+struct pb_field_iter_s {
+    const pb_msgdesc_t *descriptor;  /* Pointer to message descriptor constant */
+    void *message;                   /* Pointer to start of the structure */
+
+    pb_size_t index;                 /* Index of the field */
+    pb_size_t field_info_index;      /* Index to descriptor->field_info array */
+    pb_size_t required_field_index;  /* Index that counts only the required fields */
+    pb_size_t submessage_index;      /* Index that counts only submessages */
+
+    pb_size_t tag;                   /* Tag of current field */
+    pb_size_t data_size;             /* sizeof() of a single item */
+    pb_size_t array_size;            /* Number of array entries */
+    pb_type_t type;                  /* Type of current field */
+
+    void *pField;                    /* Pointer to current field in struct */
+    void *pData;                     /* Pointer to current data contents. Different than pField for arrays and pointers. */
+    void *pSize;                     /* Pointer to count/has field */
+
+    const pb_msgdesc_t *submsg_desc; /* For submessage fields, pointer to field descriptor for the submessage. */
+};
+
+/* For compatibility with legacy code */
+typedef pb_field_iter_t pb_field_t;
+
+/* Make sure that the standard integer types are of the expected sizes.
+ * Otherwise fixed32/fixed64 fields can break.
+ *
+ * If you get errors here, it probably means that your stdint.h is not
+ * correct for your platform.
+ */
+#ifndef PB_WITHOUT_64BIT
+PB_STATIC_ASSERT(sizeof(int64_t) == 2 * sizeof(int32_t), INT64_T_WRONG_SIZE)
+PB_STATIC_ASSERT(sizeof(uint64_t) == 2 * sizeof(uint32_t), UINT64_T_WRONG_SIZE)
+#endif
+
+/* This structure is used for 'bytes' arrays.
+ * It has the number of bytes in the beginning, and after that an array.
+ * Note that actual structs used will have a different length of bytes array.
+ */
+#define PB_BYTES_ARRAY_T(n) struct { pb_size_t size; pb_byte_t bytes[n]; }
+#define PB_BYTES_ARRAY_T_ALLOCSIZE(n) ((size_t)n + offsetof(pb_bytes_array_t, bytes))
+
+struct pb_bytes_array_s {
+    pb_size_t size;
+    pb_byte_t bytes[1];
+};
+typedef struct pb_bytes_array_s pb_bytes_array_t;
+
+/* This structure is used for giving the callback function.
+ * It is stored in the message structure and filled in by the method that
+ * calls pb_decode.
+ *
+ * The decoding callback will be given a limited-length stream
+ * If the wire type was string, the length is the length of the string.
+ * If the wire type was a varint/fixed32/fixed64, the length is the length
+ * of the actual value.
+ * The function may be called multiple times (especially for repeated types,
+ * but also otherwise if the message happens to contain the field multiple
+ * times.)
+ *
+ * The encoding callback will receive the actual output stream.
+ * It should write all the data in one call, including the field tag and
+ * wire type. It can write multiple fields.
+ *
+ * The callback can be null if you want to skip a field.
+ */
+typedef struct pb_callback_s pb_callback_t;
+struct pb_callback_s {
+    /* Callback functions receive a pointer to the arg field.
+     * You can access the value of the field as *arg, and modify it if needed.
+     */
+    union {
+        bool (*decode)(pb_istream_t *stream, const pb_field_t *field, void **arg);
+        bool (*encode)(pb_ostream_t *stream, const pb_field_t *field, void * const *arg);
+    } funcs;
+    
+    /* Free arg for use by callback */
+    void *arg;
+};
+
+extern bool pb_default_field_callback(pb_istream_t *istream, pb_ostream_t *ostream, const pb_field_t *field);
+
+/* Wire types. Library user needs these only in encoder callbacks. */
+typedef enum {
+    PB_WT_VARINT = 0,
+    PB_WT_64BIT  = 1,
+    PB_WT_STRING = 2,
+    PB_WT_32BIT  = 5
+} pb_wire_type_t;
+
+/* Structure for defining the handling of unknown/extension fields.
+ * Usually the pb_extension_type_t structure is automatically generated,
+ * while the pb_extension_t structure is created by the user. However,
+ * if you want to catch all unknown fields, you can also create a custom
+ * pb_extension_type_t with your own callback.
+ */
+typedef struct pb_extension_type_s pb_extension_type_t;
+typedef struct pb_extension_s pb_extension_t;
+struct pb_extension_type_s {
+    /* Called for each unknown field in the message.
+     * If you handle the field, read off all of its data and return true.
+     * If you do not handle the field, do not read anything and return true.
+     * If you run into an error, return false.
+     * Set to NULL for default handler.
+     */
+    bool (*decode)(pb_istream_t *stream, pb_extension_t *extension,
+                   uint32_t tag, pb_wire_type_t wire_type);
+    
+    /* Called once after all regular fields have been encoded.
+     * If you have something to write, do so and return true.
+     * If you do not have anything to write, just return true.
+     * If you run into an error, return false.
+     * Set to NULL for default handler.
+     */
+    bool (*encode)(pb_ostream_t *stream, const pb_extension_t *extension);
+    
+    /* Free field for use by the callback. */
+    const void *arg;
+};
+
+struct pb_extension_s {
+    /* Type describing the extension field. Usually you'll initialize
+     * this to a pointer to the automatically generated structure. */
+    const pb_extension_type_t *type;
+    
+    /* Destination for the decoded data. This must match the datatype
+     * of the extension field. */
+    void *dest;
+    
+    /* Pointer to the next extension handler, or NULL.
+     * If this extension does not match a field, the next handler is
+     * automatically called. */
+    pb_extension_t *next;
+
+    /* The decoder sets this to true if the extension was found.
+     * Ignored for encoding. */
+    bool found;
+};
+
+#define pb_extension_init_zero {NULL,NULL,NULL,false}
+
+/* Memory allocation functions to use. You can define pb_realloc and
+ * pb_free to custom functions if you want. */
+#ifdef PB_ENABLE_MALLOC
+#   ifndef pb_realloc
+#       define pb_realloc(ptr, size) realloc(ptr, size)
+#   endif
+#   ifndef pb_free
+#       define pb_free(ptr) free(ptr)
+#   endif
+#endif
+
+/* This is used to inform about need to regenerate .pb.h/.pb.c files. */
+#define PB_PROTO_HEADER_VERSION 40
+
+/* These macros are used to declare pb_field_t's in the constant array. */
+/* Size of a structure member, in bytes. */
+#define pb_membersize(st, m) (sizeof ((st*)0)->m)
+/* Number of entries in an array. */
+#define pb_arraysize(st, m) (pb_membersize(st, m) / pb_membersize(st, m[0]))
+/* Delta from start of one member to the start of another member. */
+#define pb_delta(st, m1, m2) ((int)offsetof(st, m1) - (int)offsetof(st, m2))
+
+/* Force expansion of macro value */
+#define PB_EXPAND(x) x
+
+/* Binding of a message field set into a specific structure */
+#define PB_BIND(msgname, structname, width) \
+    const uint32_t structname ## _field_info[] PB_PROGMEM = \
+    { \
+        msgname ## _FIELDLIST(PB_GEN_FIELD_INFO_ ## width, structname) \
+        0 \
+    }; \
+    const pb_msgdesc_t* const structname ## _submsg_info[] = \
+    { \
+        msgname ## _FIELDLIST(PB_GEN_SUBMSG_INFO, structname) \
+        NULL \
+    }; \
+    const pb_msgdesc_t structname ## _msg = \
+    { \
+       structname ## _field_info, \
+       structname ## _submsg_info, \
+       msgname ## _DEFAULT, \
+       msgname ## _CALLBACK, \
+       0 msgname ## _FIELDLIST(PB_GEN_FIELD_COUNT, structname), \
+       0 msgname ## _FIELDLIST(PB_GEN_REQ_FIELD_COUNT, structname), \
+       0 msgname ## _FIELDLIST(PB_GEN_LARGEST_TAG, structname), \
+    }; \
+    msgname ## _FIELDLIST(PB_GEN_FIELD_INFO_ASSERT_ ## width, structname)
+
+#define PB_GEN_FIELD_COUNT(structname, atype, htype, ltype, fieldname, tag) +1
+#define PB_GEN_REQ_FIELD_COUNT(structname, atype, htype, ltype, fieldname, tag) \
+    + (PB_HTYPE_ ## htype == PB_HTYPE_REQUIRED)
+#define PB_GEN_LARGEST_TAG(structname, atype, htype, ltype, fieldname, tag) \
+    * 0 + tag
+
+/* X-macro for generating the entries in struct_field_info[] array. */
+#define PB_GEN_FIELD_INFO_1(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_1(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_2(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_2(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_4(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_4(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_8(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_8(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_AUTO(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_AUTO2(PB_FIELDINFO_WIDTH_AUTO(_PB_ATYPE_ ## atype, _PB_HTYPE_ ## htype, _PB_LTYPE_ ## ltype), \
+                   tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_FIELDINFO_AUTO2(width, tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_FIELDINFO_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size)
+
+#define PB_FIELDINFO_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_FIELDINFO_ ## width(tag, type, data_offset, data_size, size_offset, array_size)
+
+/* X-macro for generating asserts that entries fit in struct_field_info[] array.
+ * The structure of macros here must match the structure above in PB_GEN_FIELD_INFO_x(),
+ * but it is not easily reused because of how macro substitutions work. */
+#define PB_GEN_FIELD_INFO_ASSERT_1(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_ASSERT_1(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_ASSERT_2(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_ASSERT_2(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_ASSERT_4(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_ASSERT_4(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_ASSERT_8(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_ASSERT_8(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_GEN_FIELD_INFO_ASSERT_AUTO(structname, atype, htype, ltype, fieldname, tag) \
+    PB_FIELDINFO_ASSERT_AUTO2(PB_FIELDINFO_WIDTH_AUTO(_PB_ATYPE_ ## atype, _PB_HTYPE_ ## htype, _PB_LTYPE_ ## ltype), \
+                   tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
+                   PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
+                   PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
+
+#define PB_FIELDINFO_ASSERT_AUTO2(width, tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_FIELDINFO_ASSERT_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size)
+
+#define PB_FIELDINFO_ASSERT_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_FIELDINFO_ASSERT_ ## width(tag, type, data_offset, data_size, size_offset, array_size)
+
+#define PB_DATA_OFFSET_STATIC(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
+#define PB_DATA_OFFSET_POINTER(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
+#define PB_DATA_OFFSET_CALLBACK(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
+#define PB_DO_PB_HTYPE_REQUIRED(structname, fieldname) offsetof(structname, fieldname)
+#define PB_DO_PB_HTYPE_SINGULAR(structname, fieldname) offsetof(structname, fieldname)
+#define PB_DO_PB_HTYPE_ONEOF(structname, fieldname) offsetof(structname, PB_ONEOF_NAME(FULL, fieldname))
+#define PB_DO_PB_HTYPE_OPTIONAL(structname, fieldname) offsetof(structname, fieldname)
+#define PB_DO_PB_HTYPE_REPEATED(structname, fieldname) offsetof(structname, fieldname)
+#define PB_DO_PB_HTYPE_FIXARRAY(structname, fieldname) offsetof(structname, fieldname)
+
+#define PB_SIZE_OFFSET_STATIC(htype, structname, fieldname) PB_SO ## htype(structname, fieldname)
+#define PB_SIZE_OFFSET_POINTER(htype, structname, fieldname) PB_SO_PTR ## htype(structname, fieldname)
+#define PB_SIZE_OFFSET_CALLBACK(htype, structname, fieldname) PB_SO_CB ## htype(structname, fieldname)
+#define PB_SO_PB_HTYPE_REQUIRED(structname, fieldname) 0
+#define PB_SO_PB_HTYPE_SINGULAR(structname, fieldname) 0
+#define PB_SO_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF2(structname, PB_ONEOF_NAME(FULL, fieldname), PB_ONEOF_NAME(UNION, fieldname))
+#define PB_SO_PB_HTYPE_ONEOF2(structname, fullname, unionname) PB_SO_PB_HTYPE_ONEOF3(structname, fullname, unionname)
+#define PB_SO_PB_HTYPE_ONEOF3(structname, fullname, unionname) pb_delta(structname, fullname, which_ ## unionname)
+#define PB_SO_PB_HTYPE_OPTIONAL(structname, fieldname) pb_delta(structname, fieldname, has_ ## fieldname)
+#define PB_SO_PB_HTYPE_REPEATED(structname, fieldname) pb_delta(structname, fieldname, fieldname ## _count)
+#define PB_SO_PB_HTYPE_FIXARRAY(structname, fieldname) 0
+#define PB_SO_PTR_PB_HTYPE_REQUIRED(structname, fieldname) 0
+#define PB_SO_PTR_PB_HTYPE_SINGULAR(structname, fieldname) 0
+#define PB_SO_PTR_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF(structname, fieldname)
+#define PB_SO_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) 0
+#define PB_SO_PTR_PB_HTYPE_REPEATED(structname, fieldname) PB_SO_PB_HTYPE_REPEATED(structname, fieldname)
+#define PB_SO_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) 0
+#define PB_SO_CB_PB_HTYPE_REQUIRED(structname, fieldname) 0
+#define PB_SO_CB_PB_HTYPE_SINGULAR(structname, fieldname) 0
+#define PB_SO_CB_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF(structname, fieldname)
+#define PB_SO_CB_PB_HTYPE_OPTIONAL(structname, fieldname) 0
+#define PB_SO_CB_PB_HTYPE_REPEATED(structname, fieldname) 0
+#define PB_SO_CB_PB_HTYPE_FIXARRAY(structname, fieldname) 0
+
+#define PB_ARRAY_SIZE_STATIC(htype, structname, fieldname) PB_AS ## htype(structname, fieldname)
+#define PB_ARRAY_SIZE_POINTER(htype, structname, fieldname) PB_AS_PTR ## htype(structname, fieldname)
+#define PB_ARRAY_SIZE_CALLBACK(htype, structname, fieldname) 1
+#define PB_AS_PB_HTYPE_REQUIRED(structname, fieldname) 1
+#define PB_AS_PB_HTYPE_SINGULAR(structname, fieldname) 1
+#define PB_AS_PB_HTYPE_OPTIONAL(structname, fieldname) 1
+#define PB_AS_PB_HTYPE_ONEOF(structname, fieldname) 1
+#define PB_AS_PB_HTYPE_REPEATED(structname, fieldname) pb_arraysize(structname, fieldname)
+#define PB_AS_PB_HTYPE_FIXARRAY(structname, fieldname) pb_arraysize(structname, fieldname)
+#define PB_AS_PTR_PB_HTYPE_REQUIRED(structname, fieldname) 1
+#define PB_AS_PTR_PB_HTYPE_SINGULAR(structname, fieldname) 1
+#define PB_AS_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) 1
+#define PB_AS_PTR_PB_HTYPE_ONEOF(structname, fieldname) 1
+#define PB_AS_PTR_PB_HTYPE_REPEATED(structname, fieldname) 1
+#define PB_AS_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) pb_arraysize(structname, fieldname[0])
+
+#define PB_DATA_SIZE_STATIC(htype, structname, fieldname) PB_DS ## htype(structname, fieldname)
+#define PB_DATA_SIZE_POINTER(htype, structname, fieldname) PB_DS_PTR ## htype(structname, fieldname)
+#define PB_DATA_SIZE_CALLBACK(htype, structname, fieldname) PB_DS_CB ## htype(structname, fieldname)
+#define PB_DS_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname))
+#define PB_DS_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PTR_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PTR_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PTR_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname)[0])
+#define PB_DS_PTR_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname[0])
+#define PB_DS_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname[0][0])
+#define PB_DS_CB_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_CB_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_CB_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_CB_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname))
+#define PB_DS_CB_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname)
+#define PB_DS_CB_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname)
+
+#define PB_ONEOF_NAME(type, tuple) PB_EXPAND(PB_ONEOF_NAME_ ## type tuple)
+#define PB_ONEOF_NAME_UNION(unionname,membername,fullname) unionname
+#define PB_ONEOF_NAME_MEMBER(unionname,membername,fullname) membername
+#define PB_ONEOF_NAME_FULL(unionname,membername,fullname) fullname
+
+#define PB_GEN_SUBMSG_INFO(structname, atype, htype, ltype, fieldname, tag) \
+    PB_SUBMSG_INFO_ ## htype(_PB_LTYPE_ ## ltype, structname, fieldname)
+
+#define PB_SUBMSG_INFO_REQUIRED(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
+#define PB_SUBMSG_INFO_SINGULAR(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
+#define PB_SUBMSG_INFO_OPTIONAL(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
+#define PB_SUBMSG_INFO_ONEOF(ltype, structname, fieldname) PB_SUBMSG_INFO_ONEOF2(ltype, structname, PB_ONEOF_NAME(UNION, fieldname), PB_ONEOF_NAME(MEMBER, fieldname))
+#define PB_SUBMSG_INFO_ONEOF2(ltype, structname, unionname, membername) PB_SUBMSG_INFO_ONEOF3(ltype, structname, unionname, membername)
+#define PB_SUBMSG_INFO_ONEOF3(ltype, structname, unionname, membername) PB_SI ## ltype(structname ## _ ## unionname ## _ ## membername ## _MSGTYPE)
+#define PB_SUBMSG_INFO_REPEATED(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
+#define PB_SUBMSG_INFO_FIXARRAY(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
+#define PB_SI_PB_LTYPE_BOOL(t)
+#define PB_SI_PB_LTYPE_BYTES(t)
+#define PB_SI_PB_LTYPE_DOUBLE(t)
+#define PB_SI_PB_LTYPE_ENUM(t)
+#define PB_SI_PB_LTYPE_UENUM(t)
+#define PB_SI_PB_LTYPE_FIXED32(t)
+#define PB_SI_PB_LTYPE_FIXED64(t)
+#define PB_SI_PB_LTYPE_FLOAT(t)
+#define PB_SI_PB_LTYPE_INT32(t)
+#define PB_SI_PB_LTYPE_INT64(t)
+#define PB_SI_PB_LTYPE_MESSAGE(t)  PB_SUBMSG_DESCRIPTOR(t)
+#define PB_SI_PB_LTYPE_MSG_W_CB(t) PB_SUBMSG_DESCRIPTOR(t)
+#define PB_SI_PB_LTYPE_SFIXED32(t)
+#define PB_SI_PB_LTYPE_SFIXED64(t)
+#define PB_SI_PB_LTYPE_SINT32(t)
+#define PB_SI_PB_LTYPE_SINT64(t)
+#define PB_SI_PB_LTYPE_STRING(t)
+#define PB_SI_PB_LTYPE_UINT32(t)
+#define PB_SI_PB_LTYPE_UINT64(t)
+#define PB_SI_PB_LTYPE_EXTENSION(t)
+#define PB_SI_PB_LTYPE_FIXED_LENGTH_BYTES(t)
+#define PB_SUBMSG_DESCRIPTOR(t)    &(t ## _msg),
+
+/* The field descriptors use a variable width format, with width of either
+ * 1, 2, 4 or 8 of 32-bit words. The two lowest bytes of the first byte always
+ * encode the descriptor size, 6 lowest bits of field tag number, and 8 bits
+ * of the field type.
+ *
+ * Descriptor size is encoded as 0 = 1 word, 1 = 2 words, 2 = 4 words, 3 = 8 words.
+ *
+ * Formats, listed starting with the least significant bit of the first word.
+ * 1 word:  [2-bit len] [6-bit tag] [8-bit type] [8-bit data_offset] [4-bit size_offset] [4-bit data_size]
+ *
+ * 2 words: [2-bit len] [6-bit tag] [8-bit type] [12-bit array_size] [4-bit size_offset]
+ *          [16-bit data_offset] [12-bit data_size] [4-bit tag>>6]
+ *
+ * 4 words: [2-bit len] [6-bit tag] [8-bit type] [16-bit array_size]
+ *          [8-bit size_offset] [24-bit tag>>6]
+ *          [32-bit data_offset]
+ *          [32-bit data_size]
+ *
+ * 8 words: [2-bit len] [6-bit tag] [8-bit type] [16-bit reserved]
+ *          [8-bit size_offset] [24-bit tag>>6]
+ *          [32-bit data_offset]
+ *          [32-bit data_size]
+ *          [32-bit array_size]
+ *          [32-bit reserved]
+ *          [32-bit reserved]
+ *          [32-bit reserved]
+ */
+
+#define PB_FIELDINFO_1(tag, type, data_offset, data_size, size_offset, array_size) \
+    (0 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(data_offset) & 0xFF) << 16) | \
+     (((uint32_t)(size_offset) & 0x0F) << 24) | (((uint32_t)(data_size) & 0x0F) << 28)),
+
+#define PB_FIELDINFO_2(tag, type, data_offset, data_size, size_offset, array_size) \
+    (1 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(array_size) & 0xFFF) << 16) | (((uint32_t)(size_offset) & 0x0F) << 28)), \
+    (((uint32_t)(data_offset) & 0xFFFF) | (((uint32_t)(data_size) & 0xFFF) << 16) | (((uint32_t)(tag) & 0x3c0) << 22)),
+
+#define PB_FIELDINFO_4(tag, type, data_offset, data_size, size_offset, array_size) \
+    (2 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(array_size) & 0xFFFF) << 16)), \
+    ((uint32_t)(int_least8_t)(size_offset) | (((uint32_t)(tag) << 2) & 0xFFFFFF00)), \
+    (data_offset), (data_size),
+
+#define PB_FIELDINFO_8(tag, type, data_offset, data_size, size_offset, array_size) \
+    (3 | (((tag) << 2) & 0xFF) | ((type) << 8)), \
+    ((uint32_t)(int_least8_t)(size_offset) | (((uint32_t)(tag) << 2) & 0xFFFFFF00)), \
+    (data_offset), (data_size), (array_size), 0, 0, 0,
+
+/* These assertions verify that the field information fits in the allocated space.
+ * The generator tries to automatically determine the correct width that can fit all
+ * data associated with a message. These asserts will fail only if there has been a
+ * problem in the automatic logic - this may be worth reporting as a bug. As a workaround,
+ * you can increase the descriptor width by defining PB_FIELDINFO_WIDTH or by setting
+ * descriptorsize option in .options file.
+ */
+#define PB_FITS(value,bits) ((uint32_t)(value) < ((uint32_t)1<<bits))
+#define PB_FIELDINFO_ASSERT_1(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,6) && PB_FITS(data_offset,8) && PB_FITS(size_offset,4) && PB_FITS(data_size,4) && PB_FITS(array_size,1), FIELDINFO_DOES_NOT_FIT_width1_field ## tag)
+
+#define PB_FIELDINFO_ASSERT_2(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,10) && PB_FITS(data_offset,16) && PB_FITS(size_offset,4) && PB_FITS(data_size,12) && PB_FITS(array_size,12), FIELDINFO_DOES_NOT_FIT_width2_field ## tag)
+
+#ifndef PB_FIELD_32BIT
+/* Maximum field sizes are still 16-bit if pb_size_t is 16-bit */
+#define PB_FIELDINFO_ASSERT_4(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,16) && PB_FITS(data_offset,16) && PB_FITS((int_least8_t)size_offset,8) && PB_FITS(data_size,16) && PB_FITS(array_size,16), FIELDINFO_DOES_NOT_FIT_width4_field ## tag)
+
+#define PB_FIELDINFO_ASSERT_8(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,16) && PB_FITS(data_offset,16) && PB_FITS((int_least8_t)size_offset,8) && PB_FITS(data_size,16) && PB_FITS(array_size,16), FIELDINFO_DOES_NOT_FIT_width8_field ## tag)
+#else
+/* Up to 32-bit fields supported.
+ * Note that the checks are against 31 bits to avoid compiler warnings about shift wider than type in the test.
+ * I expect that there is no reasonable use for >2GB messages with nanopb anyway.
+ */
+#define PB_FIELDINFO_ASSERT_4(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,30) && PB_FITS(data_offset,31) && PB_FITS(size_offset,8) && PB_FITS(data_size,31) && PB_FITS(array_size,16), FIELDINFO_DOES_NOT_FIT_width4_field ## tag)
+
+#define PB_FIELDINFO_ASSERT_8(tag, type, data_offset, data_size, size_offset, array_size) \
+    PB_STATIC_ASSERT(PB_FITS(tag,30) && PB_FITS(data_offset,31) && PB_FITS(size_offset,8) && PB_FITS(data_size,31) && PB_FITS(array_size,31), FIELDINFO_DOES_NOT_FIT_width8_field ## tag)
+#endif
+
+
+/* Automatic picking of FIELDINFO width:
+ * Uses width 1 when possible, otherwise resorts to width 2.
+ * This is used when PB_BIND() is called with "AUTO" as the argument.
+ * The generator will give explicit size argument when it knows that a message
+ * structure grows beyond 1-word format limits.
+ */
+#define PB_FIELDINFO_WIDTH_AUTO(atype, htype, ltype) PB_FI_WIDTH ## atype(htype, ltype)
+#define PB_FI_WIDTH_PB_ATYPE_STATIC(htype, ltype) PB_FI_WIDTH ## htype(ltype)
+#define PB_FI_WIDTH_PB_ATYPE_POINTER(htype, ltype) PB_FI_WIDTH ## htype(ltype)
+#define PB_FI_WIDTH_PB_ATYPE_CALLBACK(htype, ltype) 2
+#define PB_FI_WIDTH_PB_HTYPE_REQUIRED(ltype) PB_FI_WIDTH ## ltype
+#define PB_FI_WIDTH_PB_HTYPE_SINGULAR(ltype) PB_FI_WIDTH ## ltype
+#define PB_FI_WIDTH_PB_HTYPE_OPTIONAL(ltype) PB_FI_WIDTH ## ltype
+#define PB_FI_WIDTH_PB_HTYPE_ONEOF(ltype) PB_FI_WIDTH ## ltype
+#define PB_FI_WIDTH_PB_HTYPE_REPEATED(ltype) 2
+#define PB_FI_WIDTH_PB_HTYPE_FIXARRAY(ltype) 2
+#define PB_FI_WIDTH_PB_LTYPE_BOOL      1
+#define PB_FI_WIDTH_PB_LTYPE_BYTES     2
+#define PB_FI_WIDTH_PB_LTYPE_DOUBLE    1
+#define PB_FI_WIDTH_PB_LTYPE_ENUM      1
+#define PB_FI_WIDTH_PB_LTYPE_UENUM     1
+#define PB_FI_WIDTH_PB_LTYPE_FIXED32   1
+#define PB_FI_WIDTH_PB_LTYPE_FIXED64   1
+#define PB_FI_WIDTH_PB_LTYPE_FLOAT     1
+#define PB_FI_WIDTH_PB_LTYPE_INT32     1
+#define PB_FI_WIDTH_PB_LTYPE_INT64     1
+#define PB_FI_WIDTH_PB_LTYPE_MESSAGE   2
+#define PB_FI_WIDTH_PB_LTYPE_MSG_W_CB  2
+#define PB_FI_WIDTH_PB_LTYPE_SFIXED32  1
+#define PB_FI_WIDTH_PB_LTYPE_SFIXED64  1
+#define PB_FI_WIDTH_PB_LTYPE_SINT32    1
+#define PB_FI_WIDTH_PB_LTYPE_SINT64    1
+#define PB_FI_WIDTH_PB_LTYPE_STRING    2
+#define PB_FI_WIDTH_PB_LTYPE_UINT32    1
+#define PB_FI_WIDTH_PB_LTYPE_UINT64    1
+#define PB_FI_WIDTH_PB_LTYPE_EXTENSION 1
+#define PB_FI_WIDTH_PB_LTYPE_FIXED_LENGTH_BYTES 2
+
+/* The mapping from protobuf types to LTYPEs is done using these macros. */
+#define PB_LTYPE_MAP_BOOL               PB_LTYPE_BOOL
+#define PB_LTYPE_MAP_BYTES              PB_LTYPE_BYTES
+#define PB_LTYPE_MAP_DOUBLE             PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_ENUM               PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_UENUM              PB_LTYPE_UVARINT
+#define PB_LTYPE_MAP_FIXED32            PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_FIXED64            PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_FLOAT              PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_INT32              PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_INT64              PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_MESSAGE            PB_LTYPE_SUBMESSAGE
+#define PB_LTYPE_MAP_MSG_W_CB           PB_LTYPE_SUBMSG_W_CB
+#define PB_LTYPE_MAP_SFIXED32           PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_SFIXED64           PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_SINT32             PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_SINT64             PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_STRING             PB_LTYPE_STRING
+#define PB_LTYPE_MAP_UINT32             PB_LTYPE_UVARINT
+#define PB_LTYPE_MAP_UINT64             PB_LTYPE_UVARINT
+#define PB_LTYPE_MAP_EXTENSION          PB_LTYPE_EXTENSION
+#define PB_LTYPE_MAP_FIXED_LENGTH_BYTES PB_LTYPE_FIXED_LENGTH_BYTES
+
+/* These macros are used for giving out error messages.
+ * They are mostly a debugging aid; the main error information
+ * is the true/false return value from functions.
+ * Some code space can be saved by disabling the error
+ * messages if not used.
+ *
+ * PB_SET_ERROR() sets the error message if none has been set yet.
+ *                msg must be a constant string literal.
+ * PB_GET_ERROR() always returns a pointer to a string.
+ * PB_RETURN_ERROR() sets the error and returns false from current
+ *                   function.
+ */
+#ifdef PB_NO_ERRMSG
+#define PB_SET_ERROR(stream, msg) PB_UNUSED(stream)
+#define PB_GET_ERROR(stream) "(errmsg disabled)"
+#else
+#define PB_SET_ERROR(stream, msg) (stream->errmsg = (stream)->errmsg ? (stream)->errmsg : (msg))
+#define PB_GET_ERROR(stream) ((stream)->errmsg ? (stream)->errmsg : "(none)")
+#endif
+
+#define PB_RETURN_ERROR(stream, msg) return PB_SET_ERROR(stream, msg), false
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#ifdef __cplusplus
+#if __cplusplus >= 201103L
+#define PB_CONSTEXPR constexpr
+#else  // __cplusplus >= 201103L
+#define PB_CONSTEXPR
+#endif  // __cplusplus >= 201103L
+
+#if __cplusplus >= 201703L
+#define PB_INLINE_CONSTEXPR inline constexpr
+#else  // __cplusplus >= 201703L
+#define PB_INLINE_CONSTEXPR PB_CONSTEXPR
+#endif  // __cplusplus >= 201703L
+
+namespace nanopb {
+// Each type will be partially specialized by the generator.
+template <typename GenMessageT> struct MessageDescriptor;
+}  // namespace nanopb
+#endif  /* __cplusplus */
+
+#endif
+

components/serial_sync/protobuf/nanopb/pb_common.c

@@ -0,0 +1,388 @@
+/* pb_common.c: Common support functions for pb_encode.c and pb_decode.c.
+ *
+ * 2014 Petteri Aimonen <jpa@kapsi.fi>
+ */
+
+#include "pb_common.h"
+
+static bool load_descriptor_values(pb_field_iter_t *iter)
+{
+    uint32_t word0;
+    uint32_t data_offset;
+    int_least8_t size_offset;
+
+    if (iter->index >= iter->descriptor->field_count)
+        return false;
+
+    word0 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index]);
+    iter->type = (pb_type_t)((word0 >> 8) & 0xFF);
+
+    switch(word0 & 3)
+    {
+        case 0: {
+            /* 1-word format */
+            iter->array_size = 1;
+            iter->tag = (pb_size_t)((word0 >> 2) & 0x3F);
+            size_offset = (int_least8_t)((word0 >> 24) & 0x0F);
+            data_offset = (word0 >> 16) & 0xFF;
+            iter->data_size = (pb_size_t)((word0 >> 28) & 0x0F);
+            break;
+        }
+
+        case 1: {
+            /* 2-word format */
+            uint32_t word1 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 1]);
+
+            iter->array_size = (pb_size_t)((word0 >> 16) & 0x0FFF);
+            iter->tag = (pb_size_t)(((word0 >> 2) & 0x3F) | ((word1 >> 28) << 6));
+            size_offset = (int_least8_t)((word0 >> 28) & 0x0F);
+            data_offset = word1 & 0xFFFF;
+            iter->data_size = (pb_size_t)((word1 >> 16) & 0x0FFF);
+            break;
+        }
+
+        case 2: {
+            /* 4-word format */
+            uint32_t word1 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 1]);
+            uint32_t word2 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 2]);
+            uint32_t word3 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 3]);
+
+            iter->array_size = (pb_size_t)(word0 >> 16);
+            iter->tag = (pb_size_t)(((word0 >> 2) & 0x3F) | ((word1 >> 8) << 6));
+            size_offset = (int_least8_t)(word1 & 0xFF);
+            data_offset = word2;
+            iter->data_size = (pb_size_t)word3;
+            break;
+        }
+
+        default: {
+            /* 8-word format */
+            uint32_t word1 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 1]);
+            uint32_t word2 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 2]);
+            uint32_t word3 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 3]);
+            uint32_t word4 = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index + 4]);
+
+            iter->array_size = (pb_size_t)word4;
+            iter->tag = (pb_size_t)(((word0 >> 2) & 0x3F) | ((word1 >> 8) << 6));
+            size_offset = (int_least8_t)(word1 & 0xFF);
+            data_offset = word2;
+            iter->data_size = (pb_size_t)word3;
+            break;
+        }
+    }
+
+    if (!iter->message)
+    {
+        /* Avoid doing arithmetic on null pointers, it is undefined */
+        iter->pField = NULL;
+        iter->pSize = NULL;
+    }
+    else
+    {
+        iter->pField = (char*)iter->message + data_offset;
+
+        if (size_offset)
+        {
+            iter->pSize = (char*)iter->pField - size_offset;
+        }
+        else if (PB_HTYPE(iter->type) == PB_HTYPE_REPEATED &&
+                 (PB_ATYPE(iter->type) == PB_ATYPE_STATIC ||
+                  PB_ATYPE(iter->type) == PB_ATYPE_POINTER))
+        {
+            /* Fixed count array */
+            iter->pSize = &iter->array_size;
+        }
+        else
+        {
+            iter->pSize = NULL;
+        }
+
+        if (PB_ATYPE(iter->type) == PB_ATYPE_POINTER && iter->pField != NULL)
+        {
+            iter->pData = *(void**)iter->pField;
+        }
+        else
+        {
+            iter->pData = iter->pField;
+        }
+    }
+
+    if (PB_LTYPE_IS_SUBMSG(iter->type))
+    {
+        iter->submsg_desc = iter->descriptor->submsg_info[iter->submessage_index];
+    }
+    else
+    {
+        iter->submsg_desc = NULL;
+    }
+
+    return true;
+}
+
+static void advance_iterator(pb_field_iter_t *iter)
+{
+    iter->index++;
+
+    if (iter->index >= iter->descriptor->field_count)
+    {
+        /* Restart */
+        iter->index = 0;
+        iter->field_info_index = 0;
+        iter->submessage_index = 0;
+        iter->required_field_index = 0;
+    }
+    else
+    {
+        /* Increment indexes based on previous field type.
+         * All field info formats have the following fields:
+         * - lowest 2 bits tell the amount of words in the descriptor (2^n words)
+         * - bits 2..7 give the lowest bits of tag number.
+         * - bits 8..15 give the field type.
+         */
+        uint32_t prev_descriptor = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index]);
+        pb_type_t prev_type = (prev_descriptor >> 8) & 0xFF;
+        pb_size_t descriptor_len = (pb_size_t)(1 << (prev_descriptor & 3));
+
+        /* Add to fields.
+         * The cast to pb_size_t is needed to avoid -Wconversion warning.
+         * Because the data is is constants from generator, there is no danger of overflow.
+         */
+        iter->field_info_index = (pb_size_t)(iter->field_info_index + descriptor_len);
+        iter->required_field_index = (pb_size_t)(iter->required_field_index + (PB_HTYPE(prev_type) == PB_HTYPE_REQUIRED));
+        iter->submessage_index = (pb_size_t)(iter->submessage_index + PB_LTYPE_IS_SUBMSG(prev_type));
+    }
+}
+
+bool pb_field_iter_begin(pb_field_iter_t *iter, const pb_msgdesc_t *desc, void *message)
+{
+    memset(iter, 0, sizeof(*iter));
+
+    iter->descriptor = desc;
+    iter->message = message;
+
+    return load_descriptor_values(iter);
+}
+
+bool pb_field_iter_begin_extension(pb_field_iter_t *iter, pb_extension_t *extension)
+{
+    const pb_msgdesc_t *msg = (const pb_msgdesc_t*)extension->type->arg;
+    bool status;
+
+    uint32_t word0 = PB_PROGMEM_READU32(msg->field_info[0]);
+    if (PB_ATYPE(word0 >> 8) == PB_ATYPE_POINTER)
+    {
+        /* For pointer extensions, the pointer is stored directly
+         * in the extension structure. This avoids having an extra
+         * indirection. */
+        status = pb_field_iter_begin(iter, msg, &extension->dest);
+    }
+    else
+    {
+        status = pb_field_iter_begin(iter, msg, extension->dest);
+    }
+
+    iter->pSize = &extension->found;
+    return status;
+}
+
+bool pb_field_iter_next(pb_field_iter_t *iter)
+{
+    advance_iterator(iter);
+    (void)load_descriptor_values(iter);
+    return iter->index != 0;
+}
+
+bool pb_field_iter_find(pb_field_iter_t *iter, uint32_t tag)
+{
+    if (iter->tag == tag)
+    {
+        return true; /* Nothing to do, correct field already. */
+    }
+    else if (tag > iter->descriptor->largest_tag)
+    {
+        return false;
+    }
+    else
+    {
+        pb_size_t start = iter->index;
+        uint32_t fieldinfo;
+
+        if (tag < iter->tag)
+        {
+            /* Fields are in tag number order, so we know that tag is between
+             * 0 and our start position. Setting index to end forces
+             * advance_iterator() call below to restart from beginning. */
+            iter->index = iter->descriptor->field_count;
+        }
+
+        do
+        {
+            /* Advance iterator but don't load values yet */
+            advance_iterator(iter);
+
+            /* Do fast check for tag number match */
+            fieldinfo = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index]);
+
+            if (((fieldinfo >> 2) & 0x3F) == (tag & 0x3F))
+            {
+                /* Good candidate, check further */
+                (void)load_descriptor_values(iter);
+
+                if (iter->tag == tag &&
+                    PB_LTYPE(iter->type) != PB_LTYPE_EXTENSION)
+                {
+                    /* Found it */
+                    return true;
+                }
+            }
+        } while (iter->index != start);
+
+        /* Searched all the way back to start, and found nothing. */
+        (void)load_descriptor_values(iter);
+        return false;
+    }
+}
+
+bool pb_field_iter_find_extension(pb_field_iter_t *iter)
+{
+    if (PB_LTYPE(iter->type) == PB_LTYPE_EXTENSION)
+    {
+        return true;
+    }
+    else
+    {
+        pb_size_t start = iter->index;
+        uint32_t fieldinfo;
+
+        do
+        {
+            /* Advance iterator but don't load values yet */
+            advance_iterator(iter);
+
+            /* Do fast check for field type */
+            fieldinfo = PB_PROGMEM_READU32(iter->descriptor->field_info[iter->field_info_index]);
+
+            if (PB_LTYPE((fieldinfo >> 8) & 0xFF) == PB_LTYPE_EXTENSION)
+            {
+                return load_descriptor_values(iter);
+            }
+        } while (iter->index != start);
+
+        /* Searched all the way back to start, and found nothing. */
+        (void)load_descriptor_values(iter);
+        return false;
+    }
+}
+
+static void *pb_const_cast(const void *p)
+{
+    /* Note: this casts away const, in order to use the common field iterator
+     * logic for both encoding and decoding. The cast is done using union
+     * to avoid spurious compiler warnings. */
+    union {
+        void *p1;
+        const void *p2;
+    } t;
+    t.p2 = p;
+    return t.p1;
+}
+
+bool pb_field_iter_begin_const(pb_field_iter_t *iter, const pb_msgdesc_t *desc, const void *message)
+{
+    return pb_field_iter_begin(iter, desc, pb_const_cast(message));
+}
+
+bool pb_field_iter_begin_extension_const(pb_field_iter_t *iter, const pb_extension_t *extension)
+{
+    return pb_field_iter_begin_extension(iter, (pb_extension_t*)pb_const_cast(extension));
+}
+
+bool pb_default_field_callback(pb_istream_t *istream, pb_ostream_t *ostream, const pb_field_t *field)
+{
+    if (field->data_size == sizeof(pb_callback_t))
+    {
+        pb_callback_t *pCallback = (pb_callback_t*)field->pData;
+
+        if (pCallback != NULL)
+        {
+            if (istream != NULL && pCallback->funcs.decode != NULL)
+            {
+                return pCallback->funcs.decode(istream, field, &pCallback->arg);
+            }
+
+            if (ostream != NULL && pCallback->funcs.encode != NULL)
+            {
+                return pCallback->funcs.encode(ostream, field, &pCallback->arg);
+            }
+        }
+    }
+
+    return true; /* Success, but didn't do anything */
+
+}
+
+#ifdef PB_VALIDATE_UTF8
+
+/* This function checks whether a string is valid UTF-8 text.
+ *
+ * Algorithm is adapted from https://www.cl.cam.ac.uk/~mgk25/ucs/utf8_check.c
+ * Original copyright: Markus Kuhn <http://www.cl.cam.ac.uk/~mgk25/> 2005-03-30
+ * Licensed under "Short code license", which allows use under MIT license or
+ * any compatible with it.
+ */
+
+bool pb_validate_utf8(const char *str)
+{
+    const pb_byte_t *s = (const pb_byte_t*)str;
+    while (*s)
+    {
+        if (*s < 0x80)
+        {
+            /* 0xxxxxxx */
+            s++;
+        }
+        else if ((s[0] & 0xe0) == 0xc0)
+        {
+            /* 110XXXXx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[0] & 0xfe) == 0xc0)                        /* overlong? */
+                return false;
+            else
+                s += 2;
+        }
+        else if ((s[0] & 0xf0) == 0xe0)
+        {
+            /* 1110XXXX 10Xxxxxx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[2] & 0xc0) != 0x80 ||
+                (s[0] == 0xe0 && (s[1] & 0xe0) == 0x80) ||    /* overlong? */
+                (s[0] == 0xed && (s[1] & 0xe0) == 0xa0) ||    /* surrogate? */
+                (s[0] == 0xef && s[1] == 0xbf &&
+                (s[2] & 0xfe) == 0xbe))                 /* U+FFFE or U+FFFF? */
+                return false;
+            else
+                s += 3;
+        }
+        else if ((s[0] & 0xf8) == 0xf0)
+        {
+            /* 11110XXX 10XXxxxx 10xxxxxx 10xxxxxx */
+            if ((s[1] & 0xc0) != 0x80 ||
+                (s[2] & 0xc0) != 0x80 ||
+                (s[3] & 0xc0) != 0x80 ||
+                (s[0] == 0xf0 && (s[1] & 0xf0) == 0x80) ||    /* overlong? */
+                (s[0] == 0xf4 && s[1] > 0x8f) || s[0] > 0xf4) /* > U+10FFFF? */
+                return false;
+            else
+                s += 4;
+        }
+        else
+        {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+#endif
+

components/serial_sync/protobuf/nanopb/pb_common.h

@@ -0,0 +1,49 @@
+/* pb_common.h: Common support functions for pb_encode.c and pb_decode.c.
+ * These functions are rarely needed by applications directly.
+ */
+
+#ifndef PB_COMMON_H_INCLUDED
+#define PB_COMMON_H_INCLUDED
+
+#include "pb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Initialize the field iterator structure to beginning.
+ * Returns false if the message type is empty. */
+bool pb_field_iter_begin(pb_field_iter_t *iter, const pb_msgdesc_t *desc, void *message);
+
+/* Get a field iterator for extension field. */
+bool pb_field_iter_begin_extension(pb_field_iter_t *iter, pb_extension_t *extension);
+
+/* Same as pb_field_iter_begin(), but for const message pointer.
+ * Note that the pointers in pb_field_iter_t will be non-const but shouldn't
+ * be written to when using these functions. */
+bool pb_field_iter_begin_const(pb_field_iter_t *iter, const pb_msgdesc_t *desc, const void *message);
+bool pb_field_iter_begin_extension_const(pb_field_iter_t *iter, const pb_extension_t *extension);
+
+/* Advance the iterator to the next field.
+ * Returns false when the iterator wraps back to the first field. */
+bool pb_field_iter_next(pb_field_iter_t *iter);
+
+/* Advance the iterator until it points at a field with the given tag.
+ * Returns false if no such field exists. */
+bool pb_field_iter_find(pb_field_iter_t *iter, uint32_t tag);
+
+/* Find a field with type PB_LTYPE_EXTENSION, or return false if not found.
+ * There can be only one extension range field per message. */
+bool pb_field_iter_find_extension(pb_field_iter_t *iter);
+
+#ifdef PB_VALIDATE_UTF8
+/* Validate UTF-8 text string */
+bool pb_validate_utf8(const char *s);
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
+

components/serial_sync/protobuf/nanopb/pb_decode.h

@@ -0,0 +1,199 @@
+/* pb_decode.h: Functions to decode protocol buffers. Depends on pb_decode.c.
+ * The main function is pb_decode. You also need an input stream, and the
+ * field descriptions created by nanopb_generator.py.
+ */
+
+#ifndef PB_DECODE_H_INCLUDED
+#define PB_DECODE_H_INCLUDED
+
+#include "pb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Structure for defining custom input streams. You will need to provide
+ * a callback function to read the bytes from your storage, which can be
+ * for example a file or a network socket.
+ * 
+ * The callback must conform to these rules:
+ *
+ * 1) Return false on IO errors. This will cause decoding to abort.
+ * 2) You can use state to store your own data (e.g. buffer pointer),
+ *    and rely on pb_read to verify that no-body reads past bytes_left.
+ * 3) Your callback may be used with substreams, in which case bytes_left
+ *    is different than from the main stream. Don't use bytes_left to compute
+ *    any pointers.
+ */
+struct pb_istream_s
+{
+#ifdef PB_BUFFER_ONLY
+    /* Callback pointer is not used in buffer-only configuration.
+     * Having an int pointer here allows binary compatibility but
+     * gives an error if someone tries to assign callback function.
+     */
+    int *callback;
+#else
+    bool (*callback)(pb_istream_t *stream, pb_byte_t *buf, size_t count);
+#endif
+
+    void *state; /* Free field for use by callback implementation */
+    size_t bytes_left;
+    
+#ifndef PB_NO_ERRMSG
+    const char *errmsg;
+#endif
+};
+
+#ifndef PB_NO_ERRMSG
+#define PB_ISTREAM_EMPTY {0,0,0,0}
+#else
+#define PB_ISTREAM_EMPTY {0,0,0}
+#endif
+
+/***************************
+ * Main decoding functions *
+ ***************************/
+ 
+/* Decode a single protocol buffers message from input stream into a C structure.
+ * Returns true on success, false on any failure.
+ * The actual struct pointed to by dest must match the description in fields.
+ * Callback fields of the destination structure must be initialized by caller.
+ * All other fields will be initialized by this function.
+ *
+ * Example usage:
+ *    MyMessage msg = {};
+ *    uint8_t buffer[64];
+ *    pb_istream_t stream;
+ *    
+ *    // ... read some data into buffer ...
+ *
+ *    stream = pb_istream_from_buffer(buffer, count);
+ *    pb_decode(&stream, MyMessage_fields, &msg);
+ */
+bool pb_decode(pb_istream_t *stream, const pb_msgdesc_t *fields, void *dest_struct);
+
+/* Extended version of pb_decode, with several options to control
+ * the decoding process:
+ *
+ * PB_DECODE_NOINIT:         Do not initialize the fields to default values.
+ *                           This is slightly faster if you do not need the default
+ *                           values and instead initialize the structure to 0 using
+ *                           e.g. memset(). This can also be used for merging two
+ *                           messages, i.e. combine already existing data with new
+ *                           values.
+ *
+ * PB_DECODE_DELIMITED:      Input message starts with the message size as varint.
+ *                           Corresponds to parseDelimitedFrom() in Google's
+ *                           protobuf API.
+ *
+ * PB_DECODE_NULLTERMINATED: Stop reading when field tag is read as 0. This allows
+ *                           reading null terminated messages.
+ *                           NOTE: Until nanopb-0.4.0, pb_decode() also allows
+ *                           null-termination. This behaviour is not supported in
+ *                           most other protobuf implementations, so PB_DECODE_DELIMITED
+ *                           is a better option for compatibility.
+ *
+ * Multiple flags can be combined with bitwise or (| operator)
+ */
+#define PB_DECODE_NOINIT          0x01U
+#define PB_DECODE_DELIMITED       0x02U
+#define PB_DECODE_NULLTERMINATED  0x04U
+bool pb_decode_ex(pb_istream_t *stream, const pb_msgdesc_t *fields, void *dest_struct, unsigned int flags);
+
+/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
+#define pb_decode_noinit(s,f,d) pb_decode_ex(s,f,d, PB_DECODE_NOINIT)
+#define pb_decode_delimited(s,f,d) pb_decode_ex(s,f,d, PB_DECODE_DELIMITED)
+#define pb_decode_delimited_noinit(s,f,d) pb_decode_ex(s,f,d, PB_DECODE_DELIMITED | PB_DECODE_NOINIT)
+#define pb_decode_nullterminated(s,f,d) pb_decode_ex(s,f,d, PB_DECODE_NULLTERMINATED)
+
+#ifdef PB_ENABLE_MALLOC
+/* Release any allocated pointer fields. If you use dynamic allocation, you should
+ * call this for any successfully decoded message when you are done with it. If
+ * pb_decode() returns with an error, the message is already released.
+ */
+void pb_release(const pb_msgdesc_t *fields, void *dest_struct);
+#else
+/* Allocation is not supported, so release is no-op */
+#define pb_release(fields, dest_struct) PB_UNUSED(fields); PB_UNUSED(dest_struct);
+#endif
+
+
+/**************************************
+ * Functions for manipulating streams *
+ **************************************/
+
+/* Create an input stream for reading from a memory buffer.
+ *
+ * msglen should be the actual length of the message, not the full size of
+ * allocated buffer.
+ *
+ * Alternatively, you can use a custom stream that reads directly from e.g.
+ * a file or a network socket.
+ */
+pb_istream_t pb_istream_from_buffer(const pb_byte_t *buf, size_t msglen);
+
+/* Function to read from a pb_istream_t. You can use this if you need to
+ * read some custom header data, or to read data in field callbacks.
+ */
+bool pb_read(pb_istream_t *stream, pb_byte_t *buf, size_t count);
+
+
+/************************************************
+ * Helper functions for writing field callbacks *
+ ************************************************/
+
+/* Decode the tag for the next field in the stream. Gives the wire type and
+ * field tag. At end of the message, returns false and sets eof to true. */
+bool pb_decode_tag(pb_istream_t *stream, pb_wire_type_t *wire_type, uint32_t *tag, bool *eof);
+
+/* Skip the field payload data, given the wire type. */
+bool pb_skip_field(pb_istream_t *stream, pb_wire_type_t wire_type);
+
+/* Decode an integer in the varint format. This works for enum, int32,
+ * int64, uint32 and uint64 field types. */
+#ifndef PB_WITHOUT_64BIT
+bool pb_decode_varint(pb_istream_t *stream, uint64_t *dest);
+#else
+#define pb_decode_varint pb_decode_varint32
+#endif
+
+/* Decode an integer in the varint format. This works for enum, int32,
+ * and uint32 field types. */
+bool pb_decode_varint32(pb_istream_t *stream, uint32_t *dest);
+
+/* Decode a bool value in varint format. */
+bool pb_decode_bool(pb_istream_t *stream, bool *dest);
+
+/* Decode an integer in the zig-zagged svarint format. This works for sint32
+ * and sint64. */
+#ifndef PB_WITHOUT_64BIT
+bool pb_decode_svarint(pb_istream_t *stream, int64_t *dest);
+#else
+bool pb_decode_svarint(pb_istream_t *stream, int32_t *dest);
+#endif
+
+/* Decode a fixed32, sfixed32 or float value. You need to pass a pointer to
+ * a 4-byte wide C variable. */
+bool pb_decode_fixed32(pb_istream_t *stream, void *dest);
+
+#ifndef PB_WITHOUT_64BIT
+/* Decode a fixed64, sfixed64 or double value. You need to pass a pointer to
+ * a 8-byte wide C variable. */
+bool pb_decode_fixed64(pb_istream_t *stream, void *dest);
+#endif
+
+#ifdef PB_CONVERT_DOUBLE_FLOAT
+/* Decode a double value into float variable. */
+bool pb_decode_double_as_float(pb_istream_t *stream, float *dest);
+#endif
+
+/* Make a limited-length substream for reading a PB_WT_STRING field. */
+bool pb_make_string_substream(pb_istream_t *stream, pb_istream_t *substream);
+bool pb_close_string_substream(pb_istream_t *stream, pb_istream_t *substream);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

components/serial_sync/protobuf/nanopb/pb_encode.c

@@ -0,0 +1,987 @@
+/* pb_encode.c -- encode a protobuf using minimal resources
+ *
+ * 2011 Petteri Aimonen <jpa@kapsi.fi>
+ */
+
+#include "pb.h"
+#include "pb_encode.h"
+#include "pb_common.h"
+
+/* Use the GCC warn_unused_result attribute to check that all return values
+ * are propagated correctly. On other compilers and gcc before 3.4.0 just
+ * ignore the annotation.
+ */
+#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
+    #define checkreturn
+#else
+    #define checkreturn __attribute__((warn_unused_result))
+#endif
+
+/**************************************
+ * Declarations internal to this file *
+ **************************************/
+static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count);
+static bool checkreturn encode_array(pb_ostream_t *stream, pb_field_iter_t *field);
+static bool checkreturn pb_check_proto3_default_value(const pb_field_iter_t *field);
+static bool checkreturn encode_basic_field(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn encode_callback_field(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn encode_field(pb_ostream_t *stream, pb_field_iter_t *field);
+static bool checkreturn encode_extension_field(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn default_extension_encoder(pb_ostream_t *stream, const pb_extension_t *extension);
+static bool checkreturn pb_encode_varint_32(pb_ostream_t *stream, uint32_t low, uint32_t high);
+static bool checkreturn pb_enc_bool(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_fixed(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_iter_t *field);
+static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_iter_t *field);
+
+#ifdef PB_WITHOUT_64BIT
+#define pb_int64_t int32_t
+#define pb_uint64_t uint32_t
+#else
+#define pb_int64_t int64_t
+#define pb_uint64_t uint64_t
+#endif
+
+/*******************************
+ * pb_ostream_t implementation *
+ *******************************/
+
+static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count)
+{
+    size_t i;
+    pb_byte_t *dest = (pb_byte_t*)stream->state;
+    stream->state = dest + count;
+    
+    for (i = 0; i < count; i++)
+        dest[i] = buf[i];
+    
+    return true;
+}
+
+pb_ostream_t pb_ostream_from_buffer(pb_byte_t *buf, size_t bufsize)
+{
+    pb_ostream_t stream;
+#ifdef PB_BUFFER_ONLY
+    stream.callback = (void*)1; /* Just a marker value */
+#else
+    stream.callback = &buf_write;
+#endif
+    stream.state = buf;
+    stream.max_size = bufsize;
+    stream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+    stream.errmsg = NULL;
+#endif
+    return stream;
+}
+
+bool checkreturn pb_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count)
+{
+    if (count > 0 && stream->callback != NULL)
+    {
+        if (stream->bytes_written + count < stream->bytes_written ||
+            stream->bytes_written + count > stream->max_size)
+        {
+            PB_RETURN_ERROR(stream, "stream full");
+        }
+
+#ifdef PB_BUFFER_ONLY
+        if (!buf_write(stream, buf, count))
+            PB_RETURN_ERROR(stream, "io error");
+#else        
+        if (!stream->callback(stream, buf, count))
+            PB_RETURN_ERROR(stream, "io error");
+#endif
+    }
+    
+    stream->bytes_written += count;
+    return true;
+}
+
+/*************************
+ * Encode a single field *
+ *************************/
+
+/* Read a bool value without causing undefined behavior even if the value
+ * is invalid. See issue #434 and
+ * https://stackoverflow.com/questions/27661768/weird-results-for-conditional
+ */
+static bool safe_read_bool(const void *pSize)
+{
+    const char *p = (const char *)pSize;
+    size_t i;
+    for (i = 0; i < sizeof(bool); i++)
+    {
+        if (p[i] != 0)
+            return true;
+    }
+    return false;
+}
+
+/* Encode a static array. Handles the size calculations and possible packing. */
+static bool checkreturn encode_array(pb_ostream_t *stream, pb_field_iter_t *field)
+{
+    pb_size_t i;
+    pb_size_t count;
+#ifndef PB_ENCODE_ARRAYS_UNPACKED
+    size_t size;
+#endif
+
+    count = *(pb_size_t*)field->pSize;
+
+    if (count == 0)
+        return true;
+
+    if (PB_ATYPE(field->type) != PB_ATYPE_POINTER && count > field->array_size)
+        PB_RETURN_ERROR(stream, "array max size exceeded");
+    
+#ifndef PB_ENCODE_ARRAYS_UNPACKED
+    /* We always pack arrays if the datatype allows it. */
+    if (PB_LTYPE(field->type) <= PB_LTYPE_LAST_PACKABLE)
+    {
+        if (!pb_encode_tag(stream, PB_WT_STRING, field->tag))
+            return false;
+        
+        /* Determine the total size of packed array. */
+        if (PB_LTYPE(field->type) == PB_LTYPE_FIXED32)
+        {
+            size = 4 * (size_t)count;
+        }
+        else if (PB_LTYPE(field->type) == PB_LTYPE_FIXED64)
+        {
+            size = 8 * (size_t)count;
+        }
+        else
+        { 
+            pb_ostream_t sizestream = PB_OSTREAM_SIZING;
+            void *pData_orig = field->pData;
+            for (i = 0; i < count; i++)
+            {
+                if (!pb_enc_varint(&sizestream, field))
+                    PB_RETURN_ERROR(stream, PB_GET_ERROR(&sizestream));
+                field->pData = (char*)field->pData + field->data_size;
+            }
+            field->pData = pData_orig;
+            size = sizestream.bytes_written;
+        }
+        
+        if (!pb_encode_varint(stream, (pb_uint64_t)size))
+            return false;
+        
+        if (stream->callback == NULL)
+            return pb_write(stream, NULL, size); /* Just sizing.. */
+        
+        /* Write the data */
+        for (i = 0; i < count; i++)
+        {
+            if (PB_LTYPE(field->type) == PB_LTYPE_FIXED32 || PB_LTYPE(field->type) == PB_LTYPE_FIXED64)
+            {
+                if (!pb_enc_fixed(stream, field))
+                    return false;
+            }
+            else
+            {
+                if (!pb_enc_varint(stream, field))
+                    return false;
+            }
+
+            field->pData = (char*)field->pData + field->data_size;
+        }
+    }
+    else /* Unpacked fields */
+#endif
+    {
+        for (i = 0; i < count; i++)
+        {
+            /* Normally the data is stored directly in the array entries, but
+             * for pointer-type string and bytes fields, the array entries are
+             * actually pointers themselves also. So we have to dereference once
+             * more to get to the actual data. */
+            if (PB_ATYPE(field->type) == PB_ATYPE_POINTER &&
+                (PB_LTYPE(field->type) == PB_LTYPE_STRING ||
+                 PB_LTYPE(field->type) == PB_LTYPE_BYTES))
+            {
+                bool status;
+                void *pData_orig = field->pData;
+                field->pData = *(void* const*)field->pData;
+
+                if (!field->pData)
+                {
+                    /* Null pointer in array is treated as empty string / bytes */
+                    status = pb_encode_tag_for_field(stream, field) &&
+                             pb_encode_varint(stream, 0);
+                }
+                else
+                {
+                    status = encode_basic_field(stream, field);
+                }
+
+                field->pData = pData_orig;
+
+                if (!status)
+                    return false;
+            }
+            else
+            {
+                if (!encode_basic_field(stream, field))
+                    return false;
+            }
+            field->pData = (char*)field->pData + field->data_size;
+        }
+    }
+    
+    return true;
+}
+
+/* In proto3, all fields are optional and are only encoded if their value is "non-zero".
+ * This function implements the check for the zero value. */
+static bool checkreturn pb_check_proto3_default_value(const pb_field_iter_t *field)
+{
+    pb_type_t type = field->type;
+
+    if (PB_ATYPE(type) == PB_ATYPE_STATIC)
+    {
+        if (PB_HTYPE(type) == PB_HTYPE_REQUIRED)
+        {
+            /* Required proto2 fields inside proto3 submessage, pretty rare case */
+            return false;
+        }
+        else if (PB_HTYPE(type) == PB_HTYPE_REPEATED)
+        {
+            /* Repeated fields inside proto3 submessage: present if count != 0 */
+            return *(const pb_size_t*)field->pSize == 0;
+        }
+        else if (PB_HTYPE(type) == PB_HTYPE_ONEOF)
+        {
+            /* Oneof fields */
+            return *(const pb_size_t*)field->pSize == 0;
+        }
+        else if (PB_HTYPE(type) == PB_HTYPE_OPTIONAL && field->pSize != NULL)
+        {
+            /* Proto2 optional fields inside proto3 message, or proto3
+             * submessage fields. */
+            return safe_read_bool(field->pSize) == false;
+        }
+        else if (field->descriptor->default_value)
+        {
+            /* Proto3 messages do not have default values, but proto2 messages
+             * can contain optional fields without has_fields (generator option 'proto3').
+             * In this case they must always be encoded, to make sure that the
+             * non-zero default value is overwritten.
+             */
+            return false;
+        }
+
+        /* Rest is proto3 singular fields */
+        if (PB_LTYPE(type) <= PB_LTYPE_LAST_PACKABLE)
+        {
+            /* Simple integer / float fields */
+            pb_size_t i;
+            const char *p = (const char*)field->pData;
+            for (i = 0; i < field->data_size; i++)
+            {
+                if (p[i] != 0)
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+        else if (PB_LTYPE(type) == PB_LTYPE_BYTES)
+        {
+            const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)field->pData;
+            return bytes->size == 0;
+        }
+        else if (PB_LTYPE(type) == PB_LTYPE_STRING)
+        {
+            return *(const char*)field->pData == '\0';
+        }
+        else if (PB_LTYPE(type) == PB_LTYPE_FIXED_LENGTH_BYTES)
+        {
+            /* Fixed length bytes is only empty if its length is fixed
+             * as 0. Which would be pretty strange, but we can check
+             * it anyway. */
+            return field->data_size == 0;
+        }
+        else if (PB_LTYPE_IS_SUBMSG(type))
+        {
+            /* Check all fields in the submessage to find if any of them
+             * are non-zero. The comparison cannot be done byte-per-byte
+             * because the C struct may contain padding bytes that must
+             * be skipped. Note that usually proto3 submessages have
+             * a separate has_field that is checked earlier in this if.
+             */
+            pb_field_iter_t iter;
+            if (pb_field_iter_begin(&iter, field->submsg_desc, field->pData))
+            {
+                do
+                {
+                    if (!pb_check_proto3_default_value(&iter))
+                    {
+                        return false;
+                    }
+                } while (pb_field_iter_next(&iter));
+            }
+            return true;
+        }
+    }
+    else if (PB_ATYPE(type) == PB_ATYPE_POINTER)
+    {
+        return field->pData == NULL;
+    }
+    else if (PB_ATYPE(type) == PB_ATYPE_CALLBACK)
+    {
+        if (PB_LTYPE(type) == PB_LTYPE_EXTENSION)
+        {
+            const pb_extension_t *extension = *(const pb_extension_t* const *)field->pData;
+            return extension == NULL;
+        }
+        else if (field->descriptor->field_callback == pb_default_field_callback)
+        {
+            pb_callback_t *pCallback = (pb_callback_t*)field->pData;
+            return pCallback->funcs.encode == NULL;
+        }
+        else
+        {
+            return field->descriptor->field_callback == NULL;
+        }
+    }
+
+    return false; /* Not typically reached, safe default for weird special cases. */
+}
+
+/* Encode a field with static or pointer allocation, i.e. one whose data
+ * is available to the encoder directly. */
+static bool checkreturn encode_basic_field(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    if (!field->pData)
+    {
+        /* Missing pointer field */
+        return true;
+    }
+
+    if (!pb_encode_tag_for_field(stream, field))
+        return false;
+
+    switch (PB_LTYPE(field->type))
+    {
+        case PB_LTYPE_BOOL:
+            return pb_enc_bool(stream, field);
+
+        case PB_LTYPE_VARINT:
+        case PB_LTYPE_UVARINT:
+        case PB_LTYPE_SVARINT:
+            return pb_enc_varint(stream, field);
+
+        case PB_LTYPE_FIXED32:
+        case PB_LTYPE_FIXED64:
+            return pb_enc_fixed(stream, field);
+
+        case PB_LTYPE_BYTES:
+            return pb_enc_bytes(stream, field);
+
+        case PB_LTYPE_STRING:
+            return pb_enc_string(stream, field);
+
+        case PB_LTYPE_SUBMESSAGE:
+        case PB_LTYPE_SUBMSG_W_CB:
+            return pb_enc_submessage(stream, field);
+
+        case PB_LTYPE_FIXED_LENGTH_BYTES:
+            return pb_enc_fixed_length_bytes(stream, field);
+
+        default:
+            PB_RETURN_ERROR(stream, "invalid field type");
+    }
+}
+
+/* Encode a field with callback semantics. This means that a user function is
+ * called to provide and encode the actual data. */
+static bool checkreturn encode_callback_field(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    if (field->descriptor->field_callback != NULL)
+    {
+        if (!field->descriptor->field_callback(NULL, stream, field))
+            PB_RETURN_ERROR(stream, "callback error");
+    }
+    return true;
+}
+
+/* Encode a single field of any callback, pointer or static type. */
+static bool checkreturn encode_field(pb_ostream_t *stream, pb_field_iter_t *field)
+{
+    /* Check field presence */
+    if (PB_HTYPE(field->type) == PB_HTYPE_ONEOF)
+    {
+        if (*(const pb_size_t*)field->pSize != field->tag)
+        {
+            /* Different type oneof field */
+            return true;
+        }
+    }
+    else if (PB_HTYPE(field->type) == PB_HTYPE_OPTIONAL)
+    {
+        if (field->pSize)
+        {
+            if (safe_read_bool(field->pSize) == false)
+            {
+                /* Missing optional field */
+                return true;
+            }
+        }
+        else if (PB_ATYPE(field->type) == PB_ATYPE_STATIC)
+        {
+            /* Proto3 singular field */
+            if (pb_check_proto3_default_value(field))
+                return true;
+        }
+    }
+
+    if (!field->pData)
+    {
+        if (PB_HTYPE(field->type) == PB_HTYPE_REQUIRED)
+            PB_RETURN_ERROR(stream, "missing required field");
+
+        /* Pointer field set to NULL */
+        return true;
+    }
+
+    /* Then encode field contents */
+    if (PB_ATYPE(field->type) == PB_ATYPE_CALLBACK)
+    {
+        return encode_callback_field(stream, field);
+    }
+    else if (PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
+    {
+        return encode_array(stream, field);
+    }
+    else
+    {
+        return encode_basic_field(stream, field);
+    }
+}
+
+/* Default handler for extension fields. Expects to have a pb_msgdesc_t
+ * pointer in the extension->type->arg field, pointing to a message with
+ * only one field in it.  */
+static bool checkreturn default_extension_encoder(pb_ostream_t *stream, const pb_extension_t *extension)
+{
+    pb_field_iter_t iter;
+
+    if (!pb_field_iter_begin_extension_const(&iter, extension))
+        PB_RETURN_ERROR(stream, "invalid extension");
+
+    return encode_field(stream, &iter);
+}
+
+
+/* Walk through all the registered extensions and give them a chance
+ * to encode themselves. */
+static bool checkreturn encode_extension_field(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    const pb_extension_t *extension = *(const pb_extension_t* const *)field->pData;
+
+    while (extension)
+    {
+        bool status;
+        if (extension->type->encode)
+            status = extension->type->encode(stream, extension);
+        else
+            status = default_extension_encoder(stream, extension);
+
+        if (!status)
+            return false;
+        
+        extension = extension->next;
+    }
+    
+    return true;
+}
+
+/*********************
+ * Encode all fields *
+ *********************/
+
+bool checkreturn pb_encode(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct)
+{
+    pb_field_iter_t iter;
+    if (!pb_field_iter_begin_const(&iter, fields, src_struct))
+        return true; /* Empty message type */
+    
+    do {
+        if (PB_LTYPE(iter.type) == PB_LTYPE_EXTENSION)
+        {
+            /* Special case for the extension field placeholder */
+            if (!encode_extension_field(stream, &iter))
+                return false;
+        }
+        else
+        {
+            /* Regular field */
+            if (!encode_field(stream, &iter))
+                return false;
+        }
+    } while (pb_field_iter_next(&iter));
+    
+    return true;
+}
+
+bool checkreturn pb_encode_ex(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct, unsigned int flags)
+{
+  if ((flags & PB_ENCODE_DELIMITED) != 0)
+  {
+    return pb_encode_submessage(stream, fields, src_struct);
+  }
+  else if ((flags & PB_ENCODE_NULLTERMINATED) != 0)
+  {
+    const pb_byte_t zero = 0;
+
+    if (!pb_encode(stream, fields, src_struct))
+        return false;
+
+    return pb_write(stream, &zero, 1);
+  }
+  else
+  {
+    return pb_encode(stream, fields, src_struct);
+  }
+}
+
+bool pb_get_encoded_size(size_t *size, const pb_msgdesc_t *fields, const void *src_struct)
+{
+    pb_ostream_t stream = PB_OSTREAM_SIZING;
+    
+    if (!pb_encode(&stream, fields, src_struct))
+        return false;
+    
+    *size = stream.bytes_written;
+    return true;
+}
+
+/********************
+ * Helper functions *
+ ********************/
+
+/* This function avoids 64-bit shifts as they are quite slow on many platforms. */
+static bool checkreturn pb_encode_varint_32(pb_ostream_t *stream, uint32_t low, uint32_t high)
+{
+    size_t i = 0;
+    pb_byte_t buffer[10];
+    pb_byte_t byte = (pb_byte_t)(low & 0x7F);
+    low >>= 7;
+
+    while (i < 4 && (low != 0 || high != 0))
+    {
+        byte |= 0x80;
+        buffer[i++] = byte;
+        byte = (pb_byte_t)(low & 0x7F);
+        low >>= 7;
+    }
+
+    if (high)
+    {
+        byte = (pb_byte_t)(byte | ((high & 0x07) << 4));
+        high >>= 3;
+
+        while (high)
+        {
+            byte |= 0x80;
+            buffer[i++] = byte;
+            byte = (pb_byte_t)(high & 0x7F);
+            high >>= 7;
+        }
+    }
+
+    buffer[i++] = byte;
+
+    return pb_write(stream, buffer, i);
+}
+
+bool checkreturn pb_encode_varint(pb_ostream_t *stream, pb_uint64_t value)
+{
+    if (value <= 0x7F)
+    {
+        /* Fast path: single byte */
+        pb_byte_t byte = (pb_byte_t)value;
+        return pb_write(stream, &byte, 1);
+    }
+    else
+    {
+#ifdef PB_WITHOUT_64BIT
+        return pb_encode_varint_32(stream, value, 0);
+#else
+        return pb_encode_varint_32(stream, (uint32_t)value, (uint32_t)(value >> 32));
+#endif
+    }
+}
+
+bool checkreturn pb_encode_svarint(pb_ostream_t *stream, pb_int64_t value)
+{
+    pb_uint64_t zigzagged;
+    if (value < 0)
+        zigzagged = ~((pb_uint64_t)value << 1);
+    else
+        zigzagged = (pb_uint64_t)value << 1;
+    
+    return pb_encode_varint(stream, zigzagged);
+}
+
+bool checkreturn pb_encode_fixed32(pb_ostream_t *stream, const void *value)
+{
+    uint32_t val = *(const uint32_t*)value;
+    pb_byte_t bytes[4];
+    bytes[0] = (pb_byte_t)(val & 0xFF);
+    bytes[1] = (pb_byte_t)((val >> 8) & 0xFF);
+    bytes[2] = (pb_byte_t)((val >> 16) & 0xFF);
+    bytes[3] = (pb_byte_t)((val >> 24) & 0xFF);
+    return pb_write(stream, bytes, 4);
+}
+
+#ifndef PB_WITHOUT_64BIT
+bool checkreturn pb_encode_fixed64(pb_ostream_t *stream, const void *value)
+{
+    uint64_t val = *(const uint64_t*)value;
+    pb_byte_t bytes[8];
+    bytes[0] = (pb_byte_t)(val & 0xFF);
+    bytes[1] = (pb_byte_t)((val >> 8) & 0xFF);
+    bytes[2] = (pb_byte_t)((val >> 16) & 0xFF);
+    bytes[3] = (pb_byte_t)((val >> 24) & 0xFF);
+    bytes[4] = (pb_byte_t)((val >> 32) & 0xFF);
+    bytes[5] = (pb_byte_t)((val >> 40) & 0xFF);
+    bytes[6] = (pb_byte_t)((val >> 48) & 0xFF);
+    bytes[7] = (pb_byte_t)((val >> 56) & 0xFF);
+    return pb_write(stream, bytes, 8);
+}
+#endif
+
+bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number)
+{
+    pb_uint64_t tag = ((pb_uint64_t)field_number << 3) | wiretype;
+    return pb_encode_varint(stream, tag);
+}
+
+bool pb_encode_tag_for_field ( pb_ostream_t* stream, const pb_field_iter_t* field )
+{
+    pb_wire_type_t wiretype;
+    switch (PB_LTYPE(field->type))
+    {
+        case PB_LTYPE_BOOL:
+        case PB_LTYPE_VARINT:
+        case PB_LTYPE_UVARINT:
+        case PB_LTYPE_SVARINT:
+            wiretype = PB_WT_VARINT;
+            break;
+        
+        case PB_LTYPE_FIXED32:
+            wiretype = PB_WT_32BIT;
+            break;
+        
+        case PB_LTYPE_FIXED64:
+            wiretype = PB_WT_64BIT;
+            break;
+        
+        case PB_LTYPE_BYTES:
+        case PB_LTYPE_STRING:
+        case PB_LTYPE_SUBMESSAGE:
+        case PB_LTYPE_SUBMSG_W_CB:
+        case PB_LTYPE_FIXED_LENGTH_BYTES:
+            wiretype = PB_WT_STRING;
+            break;
+        
+        default:
+            PB_RETURN_ERROR(stream, "invalid field type");
+    }
+    
+    return pb_encode_tag(stream, wiretype, field->tag);
+}
+
+bool checkreturn pb_encode_string(pb_ostream_t *stream, const pb_byte_t *buffer, size_t size)
+{
+    if (!pb_encode_varint(stream, (pb_uint64_t)size))
+        return false;
+    
+    return pb_write(stream, buffer, size);
+}
+
+bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct)
+{
+    /* First calculate the message size using a non-writing substream. */
+    pb_ostream_t substream = PB_OSTREAM_SIZING;
+    size_t size;
+    bool status;
+    
+    if (!pb_encode(&substream, fields, src_struct))
+    {
+#ifndef PB_NO_ERRMSG
+        stream->errmsg = substream.errmsg;
+#endif
+        return false;
+    }
+    
+    size = substream.bytes_written;
+    
+    if (!pb_encode_varint(stream, (pb_uint64_t)size))
+        return false;
+    
+    if (stream->callback == NULL)
+        return pb_write(stream, NULL, size); /* Just sizing */
+    
+    if (stream->bytes_written + size > stream->max_size)
+        PB_RETURN_ERROR(stream, "stream full");
+        
+    /* Use a substream to verify that a callback doesn't write more than
+     * what it did the first time. */
+    substream.callback = stream->callback;
+    substream.state = stream->state;
+    substream.max_size = size;
+    substream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+    substream.errmsg = NULL;
+#endif
+    
+    status = pb_encode(&substream, fields, src_struct);
+    
+    stream->bytes_written += substream.bytes_written;
+    stream->state = substream.state;
+#ifndef PB_NO_ERRMSG
+    stream->errmsg = substream.errmsg;
+#endif
+    
+    if (substream.bytes_written != size)
+        PB_RETURN_ERROR(stream, "submsg size changed");
+    
+    return status;
+}
+
+/* Field encoders */
+
+static bool checkreturn pb_enc_bool(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    uint32_t value = safe_read_bool(field->pData) ? 1 : 0;
+    PB_UNUSED(field);
+    return pb_encode_varint(stream, value);
+}
+
+static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    if (PB_LTYPE(field->type) == PB_LTYPE_UVARINT)
+    {
+        /* Perform unsigned integer extension */
+        pb_uint64_t value = 0;
+
+        if (field->data_size == sizeof(uint_least8_t))
+            value = *(const uint_least8_t*)field->pData;
+        else if (field->data_size == sizeof(uint_least16_t))
+            value = *(const uint_least16_t*)field->pData;
+        else if (field->data_size == sizeof(uint32_t))
+            value = *(const uint32_t*)field->pData;
+        else if (field->data_size == sizeof(pb_uint64_t))
+            value = *(const pb_uint64_t*)field->pData;
+        else
+            PB_RETURN_ERROR(stream, "invalid data_size");
+
+        return pb_encode_varint(stream, value);
+    }
+    else
+    {
+        /* Perform signed integer extension */
+        pb_int64_t value = 0;
+
+        if (field->data_size == sizeof(int_least8_t))
+            value = *(const int_least8_t*)field->pData;
+        else if (field->data_size == sizeof(int_least16_t))
+            value = *(const int_least16_t*)field->pData;
+        else if (field->data_size == sizeof(int32_t))
+            value = *(const int32_t*)field->pData;
+        else if (field->data_size == sizeof(pb_int64_t))
+            value = *(const pb_int64_t*)field->pData;
+        else
+            PB_RETURN_ERROR(stream, "invalid data_size");
+
+        if (PB_LTYPE(field->type) == PB_LTYPE_SVARINT)
+            return pb_encode_svarint(stream, value);
+#ifdef PB_WITHOUT_64BIT
+        else if (value < 0)
+            return pb_encode_varint_32(stream, (uint32_t)value, (uint32_t)-1);
+#endif
+        else
+            return pb_encode_varint(stream, (pb_uint64_t)value);
+
+    }
+}
+
+static bool checkreturn pb_enc_fixed(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+#ifdef PB_CONVERT_DOUBLE_FLOAT
+    if (field->data_size == sizeof(float) && PB_LTYPE(field->type) == PB_LTYPE_FIXED64)
+    {
+        return pb_encode_float_as_double(stream, *(float*)field->pData);
+    }
+#endif
+
+    if (field->data_size == sizeof(uint32_t))
+    {
+        return pb_encode_fixed32(stream, field->pData);
+    }
+#ifndef PB_WITHOUT_64BIT
+    else if (field->data_size == sizeof(uint64_t))
+    {
+        return pb_encode_fixed64(stream, field->pData);
+    }
+#endif
+    else
+    {
+        PB_RETURN_ERROR(stream, "invalid data_size");
+    }
+}
+
+static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    const pb_bytes_array_t *bytes = NULL;
+
+    bytes = (const pb_bytes_array_t*)field->pData;
+    
+    if (bytes == NULL)
+    {
+        /* Treat null pointer as an empty bytes field */
+        return pb_encode_string(stream, NULL, 0);
+    }
+    
+    if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
+        bytes->size > field->data_size - offsetof(pb_bytes_array_t, bytes))
+    {
+        PB_RETURN_ERROR(stream, "bytes size exceeded");
+    }
+    
+    return pb_encode_string(stream, bytes->bytes, (size_t)bytes->size);
+}
+
+static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    size_t size = 0;
+    size_t max_size = (size_t)field->data_size;
+    const char *str = (const char*)field->pData;
+    
+    if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
+    {
+        max_size = (size_t)-1;
+    }
+    else
+    {
+        /* pb_dec_string() assumes string fields end with a null
+         * terminator when the type isn't PB_ATYPE_POINTER, so we
+         * shouldn't allow more than max-1 bytes to be written to
+         * allow space for the null terminator.
+         */
+        if (max_size == 0)
+            PB_RETURN_ERROR(stream, "zero-length string");
+
+        max_size -= 1;
+    }
+
+
+    if (str == NULL)
+    {
+        size = 0; /* Treat null pointer as an empty string */
+    }
+    else
+    {
+        const char *p = str;
+
+        /* strnlen() is not always available, so just use a loop */
+        while (size < max_size && *p != '\0')
+        {
+            size++;
+            p++;
+        }
+
+        if (*p != '\0')
+        {
+            PB_RETURN_ERROR(stream, "unterminated string");
+        }
+    }
+
+#ifdef PB_VALIDATE_UTF8
+    if (!pb_validate_utf8(str))
+        PB_RETURN_ERROR(stream, "invalid utf8");
+#endif
+
+    return pb_encode_string(stream, (const pb_byte_t*)str, size);
+}
+
+static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    if (field->submsg_desc == NULL)
+        PB_RETURN_ERROR(stream, "invalid field descriptor");
+
+    if (PB_LTYPE(field->type) == PB_LTYPE_SUBMSG_W_CB && field->pSize != NULL)
+    {
+        /* Message callback is stored right before pSize. */
+        pb_callback_t *callback = (pb_callback_t*)field->pSize - 1;
+        if (callback->funcs.encode)
+        {
+            if (!callback->funcs.encode(stream, field, &callback->arg))
+                return false;
+        }
+    }
+    
+    return pb_encode_submessage(stream, field->submsg_desc, field->pData);
+}
+
+static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_iter_t *field)
+{
+    return pb_encode_string(stream, (const pb_byte_t*)field->pData, (size_t)field->data_size);
+}
+
+#ifdef PB_CONVERT_DOUBLE_FLOAT
+bool pb_encode_float_as_double(pb_ostream_t *stream, float value)
+{
+    union { float f; uint32_t i; } in;
+    uint_least8_t sign;
+    int exponent;
+    uint64_t mantissa;
+
+    in.f = value;
+
+    /* Decompose input value */
+    sign = (uint_least8_t)((in.i >> 31) & 1);
+    exponent = (int)((in.i >> 23) & 0xFF) - 127;
+    mantissa = in.i & 0x7FFFFF;
+
+    if (exponent == 128)
+    {
+        /* Special value (NaN etc.) */
+        exponent = 1024;
+    }
+    else if (exponent == -127)
+    {
+        if (!mantissa)
+        {
+            /* Zero */
+            exponent = -1023;
+        }
+        else
+        {
+            /* Denormalized */
+            mantissa <<= 1;
+            while (!(mantissa & 0x800000))
+            {
+                mantissa <<= 1;
+                exponent--;
+            }
+            mantissa &= 0x7FFFFF;
+        }
+    }
+
+    /* Combine fields */
+    mantissa <<= 29;
+    mantissa |= (uint64_t)(exponent + 1023) << 52;
+    mantissa |= (uint64_t)sign << 63;
+
+    return pb_encode_fixed64(stream, &mantissa);
+}
+#endif

components/serial_sync/protobuf/nanopb/pb_encode.h

@@ -0,0 +1,185 @@
+/* pb_encode.h: Functions to encode protocol buffers. Depends on pb_encode.c.
+ * The main function is pb_encode. You also need an output stream, and the
+ * field descriptions created by nanopb_generator.py.
+ */
+
+#ifndef PB_ENCODE_H_INCLUDED
+#define PB_ENCODE_H_INCLUDED
+
+#include "pb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Structure for defining custom output streams. You will need to provide
+ * a callback function to write the bytes to your storage, which can be
+ * for example a file or a network socket.
+ *
+ * The callback must conform to these rules:
+ *
+ * 1) Return false on IO errors. This will cause encoding to abort.
+ * 2) You can use state to store your own data (e.g. buffer pointer).
+ * 3) pb_write will update bytes_written after your callback runs.
+ * 4) Substreams will modify max_size and bytes_written. Don't use them
+ *    to calculate any pointers.
+ */
+struct pb_ostream_s
+{
+#ifdef PB_BUFFER_ONLY
+    /* Callback pointer is not used in buffer-only configuration.
+     * Having an int pointer here allows binary compatibility but
+     * gives an error if someone tries to assign callback function.
+     * Also, NULL pointer marks a 'sizing stream' that does not
+     * write anything.
+     */
+    int *callback;
+#else
+    bool (*callback)(pb_ostream_t *stream, const pb_byte_t *buf, size_t count);
+#endif
+    void *state;          /* Free field for use by callback implementation. */
+    size_t max_size;      /* Limit number of output bytes written (or use SIZE_MAX). */
+    size_t bytes_written; /* Number of bytes written so far. */
+    
+#ifndef PB_NO_ERRMSG
+    const char *errmsg;
+#endif
+};
+
+/***************************
+ * Main encoding functions *
+ ***************************/
+
+/* Encode a single protocol buffers message from C structure into a stream.
+ * Returns true on success, false on any failure.
+ * The actual struct pointed to by src_struct must match the description in fields.
+ * All required fields in the struct are assumed to have been filled in.
+ *
+ * Example usage:
+ *    MyMessage msg = {};
+ *    uint8_t buffer[64];
+ *    pb_ostream_t stream;
+ *
+ *    msg.field1 = 42;
+ *    stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+ *    pb_encode(&stream, MyMessage_fields, &msg);
+ */
+bool pb_encode(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct);
+
+/* Extended version of pb_encode, with several options to control the
+ * encoding process:
+ *
+ * PB_ENCODE_DELIMITED:      Prepend the length of message as a varint.
+ *                           Corresponds to writeDelimitedTo() in Google's
+ *                           protobuf API.
+ *
+ * PB_ENCODE_NULLTERMINATED: Append a null byte to the message for termination.
+ *                           NOTE: This behaviour is not supported in most other
+ *                           protobuf implementations, so PB_ENCODE_DELIMITED
+ *                           is a better option for compatibility.
+ */
+#define PB_ENCODE_DELIMITED       0x02U
+#define PB_ENCODE_NULLTERMINATED  0x04U
+bool pb_encode_ex(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct, unsigned int flags);
+
+/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
+#define pb_encode_delimited(s,f,d) pb_encode_ex(s,f,d, PB_ENCODE_DELIMITED)
+#define pb_encode_nullterminated(s,f,d) pb_encode_ex(s,f,d, PB_ENCODE_NULLTERMINATED)
+
+/* Encode the message to get the size of the encoded data, but do not store
+ * the data. */
+bool pb_get_encoded_size(size_t *size, const pb_msgdesc_t *fields, const void *src_struct);
+
+/**************************************
+ * Functions for manipulating streams *
+ **************************************/
+
+/* Create an output stream for writing into a memory buffer.
+ * The number of bytes written can be found in stream.bytes_written after
+ * encoding the message.
+ *
+ * Alternatively, you can use a custom stream that writes directly to e.g.
+ * a file or a network socket.
+ */
+pb_ostream_t pb_ostream_from_buffer(pb_byte_t *buf, size_t bufsize);
+
+/* Pseudo-stream for measuring the size of a message without actually storing
+ * the encoded data.
+ * 
+ * Example usage:
+ *    MyMessage msg = {};
+ *    pb_ostream_t stream = PB_OSTREAM_SIZING;
+ *    pb_encode(&stream, MyMessage_fields, &msg);
+ *    printf("Message size is %d\n", stream.bytes_written);
+ */
+#ifndef PB_NO_ERRMSG
+#define PB_OSTREAM_SIZING {0,0,0,0,0}
+#else
+#define PB_OSTREAM_SIZING {0,0,0,0}
+#endif
+
+/* Function to write into a pb_ostream_t stream. You can use this if you need
+ * to append or prepend some custom headers to the message.
+ */
+bool pb_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count);
+
+
+/************************************************
+ * Helper functions for writing field callbacks *
+ ************************************************/
+
+/* Encode field header based on type and field number defined in the field
+ * structure. Call this from the callback before writing out field contents. */
+bool pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_iter_t *field);
+
+/* Encode field header by manually specifying wire type. You need to use this
+ * if you want to write out packed arrays from a callback field. */
+bool pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number);
+
+/* Encode an integer in the varint format.
+ * This works for bool, enum, int32, int64, uint32 and uint64 field types. */
+#ifndef PB_WITHOUT_64BIT
+bool pb_encode_varint(pb_ostream_t *stream, uint64_t value);
+#else
+bool pb_encode_varint(pb_ostream_t *stream, uint32_t value);
+#endif
+
+/* Encode an integer in the zig-zagged svarint format.
+ * This works for sint32 and sint64. */
+#ifndef PB_WITHOUT_64BIT
+bool pb_encode_svarint(pb_ostream_t *stream, int64_t value);
+#else
+bool pb_encode_svarint(pb_ostream_t *stream, int32_t value);
+#endif
+
+/* Encode a string or bytes type field. For strings, pass strlen(s) as size. */
+bool pb_encode_string(pb_ostream_t *stream, const pb_byte_t *buffer, size_t size);
+
+/* Encode a fixed32, sfixed32 or float value.
+ * You need to pass a pointer to a 4-byte wide C variable. */
+bool pb_encode_fixed32(pb_ostream_t *stream, const void *value);
+
+#ifndef PB_WITHOUT_64BIT
+/* Encode a fixed64, sfixed64 or double value.
+ * You need to pass a pointer to a 8-byte wide C variable. */
+bool pb_encode_fixed64(pb_ostream_t *stream, const void *value);
+#endif
+
+#ifdef PB_CONVERT_DOUBLE_FLOAT
+/* Encode a float value so that it appears like a double in the encoded
+ * message. */
+bool pb_encode_float_as_double(pb_ostream_t *stream, float value);
+#endif
+
+/* Encode a submessage field.
+ * You need to pass the pb_field_t array and pointer to struct, just like
+ * with pb_encode(). This internally encodes the submessage twice, first to
+ * calculate message size and then to actually write it out.
+ */
+bool pb_encode_submessage(pb_ostream_t *stream, const pb_msgdesc_t *fields, const void *src_struct);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif

components/serial_sync/src/sync_master.c

@@ -0,0 +1,443 @@
+
+/* UART asynchronous example, that uses separate RX and TX tasks
+ */
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_system.h"
+#include "esp_log.h"
+#include "esp_timer.h"
+#include "driver/uart.h"
+#include "string.h"
+#include "driver/gpio.h"
+
+#include "nanopb/pb_decode.h"
+#include "nanopb/pb_encode.h"
+#include "nanopb/pb_common.h"
+
+#include "LoToHi.pb.h"
+#include "HiToLo.pb.h"
+// #include "inc/version_autogen.h"
+#include "sync_master.h"
+#include "evse_api.h"
+
+#define VERSION_STRING "2.2"
+
+static const int RX_BUF_SIZE = 1024;
+
+#define TXD_PIN (GPIO_NUM_27)
+#define RXD_PIN (GPIO_NUM_26)
+
+static uint8_t msg[2048];
+static uint8_t code;
+static uint8_t block;
+static uint8_t *decode;
+
+static const char *TAG = "MASTER_TASK";
+
+void cobsDecodeReset()
+{
+    code = 0xff;
+    block = 0;
+    decode = msg;
+}
+
+void handlePacket(uint8_t *buf, int len);
+
+void init(void)
+{
+    const uart_config_t uart_config = {
+        .baud_rate = 115200,
+        .data_bits = UART_DATA_8_BITS,
+        .parity = UART_PARITY_DISABLE,
+        .stop_bits = UART_STOP_BITS_1,
+        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+        .source_clk = UART_SCLK_DEFAULT,
+    };
+    // We won't use a buffer for sending data.
+    uart_driver_install(UART_NUM_2, RX_BUF_SIZE * 2, 0, 0, NULL, 0);
+    uart_param_config(UART_NUM_2, &uart_config);
+    uart_set_pin(UART_NUM_2, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
+
+    cobsDecodeReset();
+}
+
+uint32_t crc32(uint8_t *buf, int len)
+{
+    int i, j;
+    uint32_t b, crc, msk;
+
+    i = 0;
+    crc = 0xFFFFFFFF;
+    while (i < len)
+    {
+        b = buf[i];
+        crc = crc ^ b;
+        for (j = 7; j >= 0; j--)
+        {
+            msk = -(crc & 1);
+            crc = (crc >> 1) ^ (0xEDB88320 & msk);
+        }
+        i = i + 1;
+    }
+    // printf("%X",crc);
+    return crc;
+}
+
+void cobsDecodeByte(uint8_t byte)
+{
+
+    // ESP_LOGI("RX_TASK", "init cobsDecodeByte");
+    // ESP_LOGI("RX_TASK", "Read bytes: '%02X'", byte);
+
+    // check max length
+    if ((decode - msg == 2048 - 1) && byte != 0x00)
+    {
+        ESP_LOGI(TAG, "cobsDecode: Buffer overflow");
+        cobsDecodeReset();
+    }
+
+    if (block)
+    {
+        // ESP_LOGI("RX_TASK", "block");
+        //  we're currently decoding and should not get a 0
+        if (byte == 0x00)
+        {
+            // probably found some garbage -> reset
+            ESP_LOGI("RX_TASK", "cobsDecode: Garbage detected");
+            cobsDecodeReset();
+            return;
+        }
+        *decode++ = byte;
+    }
+    else
+    {
+        // ESP_LOGI("RX_TASK", "not block");
+        if (code != 0xff)
+        {
+            *decode++ = 0;
+        }
+        block = code = byte;
+        if (code == 0x00)
+        {
+            // we're finished, reset everything and commit
+            if (decode == msg)
+            {
+                // we received nothing, just a 0x00
+                ESP_LOGI("RX_TASK", "cobsDecode: Received nothing");
+            }
+            else
+            {
+                // set back decode with one, as it gets post-incremented
+                handlePacket(msg, decode - 1 - msg);
+            }
+            cobsDecodeReset();
+            return; // need to return here, because of block--
+        }
+    }
+    block--;
+}
+
+void cobsDecode(uint8_t *buf, int len)
+{
+    for (int i = 0; i < len; i++)
+    {
+        cobsDecodeByte(buf[i]);
+    }
+}
+
+size_t cobsEncode(const void *data, size_t length, uint8_t *buffer)
+{
+    uint8_t *encode = buffer;  // Encoded byte pointer
+    uint8_t *codep = encode++; // Output code pointer
+    uint8_t code = 1;          // Code value
+
+    for (const uint8_t *byte = (const uint8_t *)data; length--; ++byte)
+    {
+        if (*byte) // Byte not zero, write it
+            *encode++ = *byte, ++code;
+
+        if (!*byte || code == 0xff) // Input is zero or block completed, restart
+        {
+            *codep = code, code = 1, codep = encode;
+            if (!*byte || length)
+                ++encode;
+        }
+    }
+    *codep = code; // Write final code value
+
+    // add final 0
+    *encode++ = 0x00;
+
+    return encode - buffer;
+}
+
+int linkWrite(HiToLo *m)
+{
+
+    ESP_LOGI(TAG, "linkWrite");
+    uint8_t tx_packet_buf[200];
+    uint8_t encode_buf[208];
+    pb_ostream_t ostream = pb_ostream_from_buffer(tx_packet_buf, sizeof(tx_packet_buf) - 4);
+    bool status = pb_encode(&ostream, HiToLo_fields, m);
+
+    if (!status)
+    {
+        // couldn't encode
+        return false;
+    }
+
+    size_t tx_payload_len = ostream.bytes_written;
+
+    // add crc32 (CRC-32/JAMCRC)
+    uint32_t crc = crc32(tx_packet_buf, tx_payload_len);
+
+    for (int byte_pos = 0; byte_pos < 4; ++byte_pos)
+    {
+        tx_packet_buf[tx_payload_len] = (uint8_t)crc & 0xFF;
+        crc = crc >> 8;
+        tx_payload_len++;
+    }
+    size_t tx_encode_len = cobsEncode(tx_packet_buf, tx_payload_len, encode_buf);
+    const int txBytes = uart_write_bytes(UART_NUM_2, encode_buf, tx_encode_len);
+    return txBytes;
+}
+
+void send_time_stamp()
+{
+    ESP_LOGI(TAG, "send_time_stamp");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_time_stamp_tag;
+    msg_out.payload.time_stamp = esp_timer_get_time() / 1000;
+    linkWrite(&msg_out);
+    printf("time stamp sent %i.\n", (int)msg_out.payload.time_stamp);
+}
+
+void send_connector_lock(bool on)
+{
+    ESP_LOGI(TAG, "connector_lock");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_connector_lock_tag;
+    msg_out.payload.connector_lock = on;
+    linkWrite(&msg_out);
+}
+
+void send_max_charging_current(uint32_t max_charging_current)
+{
+    ESP_LOGI(TAG, "send_max_charging_current");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_max_charging_current_tag;
+    msg_out.payload.max_charging_current = max_charging_current;
+    linkWrite(&msg_out);
+}
+
+void send_allow_power_on(bool allow_power_on)
+{
+    ESP_LOGI(TAG, "allow_power_on");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_allow_power_on_tag;
+    msg_out.payload.allow_power_on = allow_power_on;
+    linkWrite(&msg_out);
+}
+
+void send_reset(bool reset)
+{
+    ESP_LOGI(TAG, "reset");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_reset_tag;
+    msg_out.payload.reset = reset;
+    linkWrite(&msg_out);
+}
+
+void send_grid_current(uint32_t grid_current)
+{
+    ESP_LOGI(TAG, "send_grid_current");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_grid_current_tag;
+    msg_out.payload.grid_current = grid_current;
+    linkWrite(&msg_out);
+}
+
+void send_max_grid_current(uint32_t max_grid_current)
+{
+    ESP_LOGI(TAG, "send_max_grid_current");
+    HiToLo msg_out = HiToLo_init_default;
+    msg_out.which_payload = HiToLo_max_grid_current_tag;
+    msg_out.payload.max_grid_current = max_grid_current;
+    linkWrite(&msg_out);
+}
+/*
+const evse_state_t cp_state_to_evse_state(CpState cp_state)
+{
+    switch (state)
+    {
+    case CpState_EVSE_STATE_A:
+        return EVSE_STATE_A;
+    case CpState_EVSE_STATE_B1:
+        return EVSE_STATE_B1;
+    case CpState_EVSE_STATE_B2:
+        return EVSE_STATE_B2;
+    case CpState_EVSE_STATE_C1:
+        return EVSE_STATE_C1;
+    case CpState_EVSE_STATE_C2:
+        return EVSE_STATE_C2;
+    case CpState_EVSE_STATE_D1:
+        return EVSE_STATE_D1;
+    case CpState_EVSE_STATE_D2:
+        return EVSE_STATE_D2;
+    case CpState_EVSE_STATE_E:
+        return EVSE_STATE_E;
+    case CpState_EVSE_STATE_F:
+        return EVSE_STATE_F;
+    default:
+        return EVSE_STATE_F;
+    }
+}
+*/
+
+void handlePacket(uint8_t *buf, int len)
+{
+    // printf ("packet received len %u\n", len);
+
+    // Check CRC32 (last 4 bytes)
+    //  uint32_t crc = calculateCrc(rx_packet_buf, rx_packet_len);
+    if (crc32(buf, len))
+    {
+        printf("CRC mismatch\n");
+        return;
+    }
+
+    len -= 4;
+
+    LoToHi msg_in;
+
+    pb_istream_t istream = pb_istream_from_buffer(buf, len);
+
+    if (pb_decode(&istream, LoToHi_fields, &msg_in))
+    {
+        //printf("LoToHi recvd %i \n", msg_in.which_payload);
+
+        switch (msg_in.which_payload)
+        {
+        case LoToHi_time_stamp_tag:
+            printf("Received time stamp %i\n", (int)msg_in.payload.time_stamp);
+            break;
+        case LoToHi_relais_state_tag:
+            printf("Received relais_state %i\n", (int)msg_in.payload.relais_state);
+            break;
+        case LoToHi_error_flags_tag:
+            // printf("Received error_flags %i\n", (int)msg_in.payload.error_flags);
+            break;
+        case LoToHi_cp_state_tag:
+            printf("Received cp_state %i\n", (int)msg_in.payload.cp_state);
+            // state = cp_state_to_evse_state(msg_in.payload.cp_state);
+            break;
+        case LoToHi_pp_state_tag:
+            printf("Received cp_state %i\n", (int)msg_in.payload.pp_state);
+            break;
+        case LoToHi_max_charging_current_tag:
+            printf("Received max_charging_current %i\n", (int)msg_in.payload.max_charging_current);
+
+            int max_charging_current = (int)msg_in.payload.max_charging_current;
+
+            if (max_charging_current != evse_get_max_charging_current())
+            {
+                send_max_charging_current(evse_get_max_charging_current());
+            }
+            break;
+
+        case LoToHi_max_grid_current_tag:
+            printf("Received max_grid_current %i\n", (int)msg_in.payload.max_grid_current);
+
+            int max_grid_current = (int)msg_in.payload.max_grid_current;
+
+            if (max_grid_current !=  grid_get_max_current())
+            {
+                send_max_grid_current(grid_get_max_current());
+            }
+            break;
+
+        case LoToHi_lock_state_tag:
+            printf("Received lock_state %i\n", (int)msg_in.payload.lock_state);
+            break;
+        case LoToHi_power_meter_tag:
+            printf("Received power_meter %i\n", (int)msg_in.payload.power_meter.time_stamp);
+            break;
+
+        default:
+            printf("Not Found Sync Master recvd %i \n", msg_in.which_payload);
+            break;
+        }
+    }
+}
+
+static void tx_task(void *arg)
+{
+
+    while (1)
+    {
+
+        // send_time_stamp();
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+        // send_connector_lock(true);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        send_max_charging_current(32);
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        // send_allow_power_on(true);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+        // send_reset(true);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+    }
+}
+
+static void rx_task(void *arg)
+{
+    uint8_t *data = (uint8_t *)malloc(RX_BUF_SIZE + 1);
+    while (1)
+    {
+
+        const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 1000 / portTICK_PERIOD_MS);
+        if (rxBytes > 0)
+        {
+            data[rxBytes] = 0;
+            // ESP_LOGI(TAG, "Read %d bytes: '%s'", rxBytes, data);
+            // ESP_LOG_BUFFER_HEXDUMP(TAG, data, rxBytes, ESP_LOG_INFO);
+            cobsDecode(data, rxBytes);
+        }
+    }
+    free(data);
+}
+
+void master_sync_start()
+{
+    ESP_LOGI(TAG, "Master SYNC Serial");
+
+    init();
+    xTaskCreate(rx_task, "uart_rx_task", 1024 * 5, NULL, 5, NULL);
+    //xTaskCreate(tx_task, "uart_tx_task", 1024 * 5, NULL, 5, NULL);
+}
+
+void master_sync_stop(void)
+{
+    /*
+    ESP_LOGI(TAG, "Stopping");
+
+    if (rx_task)
+    {
+        vTaskDelete(rx_task);
+        rx_task = NULL;
+    }
+
+    if (tx_task)
+    {
+        vTaskDelete(tx_task);
+        tx_task = NULL;
+    }
+
+    if (port != -1)
+    {
+        uart_driver_delete(port);
+        port = -1;
+    }*/
+}

components/serial_sync/src/sync_slave.c

@@ -0,0 +1,530 @@
+/* UART asynchronous example, that uses separate RX and TX tasks sync_slave
+ */
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_system.h"
+#include "esp_log.h"
+#include "esp_timer.h"
+#include "driver/uart.h"
+#include "string.h"
+#include "driver/gpio.h"
+
+#include "nanopb/pb_decode.h"
+#include "nanopb/pb_encode.h"
+#include "nanopb/pb_common.h"
+
+#include "LoToHi.pb.h"
+#include "HiToLo.pb.h"
+// #include "inc/version_autogen.h"
+
+#include "sync_slave.h"
+#include "currentshaper.h"
+#include "evse_api.h"
+
+#define VERSION_STRING "2.2"
+
+static const int RX_BUF_SIZE = 1024;
+
+#define TXD_PIN (GPIO_NUM_27)
+#define RXD_PIN (GPIO_NUM_26)
+
+static uint8_t msg[2048];
+static uint8_t code;
+static uint8_t block;
+static uint8_t *decode;
+// static ErrorFlags error_flags;
+
+static const char *TAG = "SLAVE";
+
+void cobsDecodeReset()
+{
+    code = 0xff;
+    block = 0;
+    decode = msg;
+}
+
+void handlePacket(uint8_t *buf, int len);
+
+void init(void)
+{
+    const uart_config_t uart_config = {
+        .baud_rate = 115200,
+        .data_bits = UART_DATA_8_BITS,
+        .parity = UART_PARITY_DISABLE,
+        .stop_bits = UART_STOP_BITS_1,
+        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+        .source_clk = UART_SCLK_DEFAULT,
+    };
+    // We won't use a buffer for sending data.
+    uart_driver_install(UART_NUM_2, RX_BUF_SIZE * 2, 0, 0, NULL, 0);
+    uart_param_config(UART_NUM_2, &uart_config);
+    uart_set_pin(UART_NUM_2, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
+
+    cobsDecodeReset();
+}
+
+uint32_t crc32(uint8_t *buf, int len)
+{
+    int i, j;
+    uint32_t b, crc, msk;
+
+    i = 0;
+    crc = 0xFFFFFFFF;
+    while (i < len)
+    {
+        b = buf[i];
+        crc = crc ^ b;
+        for (j = 7; j >= 0; j--)
+        {
+            msk = -(crc & 1);
+            crc = (crc >> 1) ^ (0xEDB88320 & msk);
+        }
+        i = i + 1;
+    }
+    // printf("%X",crc);
+    return crc;
+}
+
+void cobsDecodeByte(uint8_t byte)
+{
+
+    // ESP_LOGI("RX_TASK", "init cobsDecodeByte");
+    // ESP_LOGI("RX_TASK", "Read bytes: '%02X'", byte);
+
+    // check max length
+    if ((decode - msg == 2048 - 1) && byte != 0x00)
+    {
+        ESP_LOGI(TAG, "cobsDecode: Buffer overflow");
+        cobsDecodeReset();
+    }
+
+    if (block)
+    {
+        // ESP_LOGI("RX_TASK", "block");
+        //  we're currently decoding and should not get a 0
+        if (byte == 0x00)
+        {
+            // probably found some garbage -> reset
+            ESP_LOGI(TAG, "cobsDecode: Garbage detected");
+            cobsDecodeReset();
+            return;
+        }
+        *decode++ = byte;
+    }
+    else
+    {
+        // ESP_LOGI("RX_TASK", "not block");
+        if (code != 0xff)
+        {
+            *decode++ = 0;
+        }
+        block = code = byte;
+        if (code == 0x00)
+        {
+            // we're finished, reset everything and commit
+            if (decode == msg)
+            {
+                // we received nothing, just a 0x00
+                ESP_LOGI(TAG, "cobsDecode: Received nothing");
+            }
+            else
+            {
+                // set back decode with one, as it gets post-incremented
+                handlePacket(msg, decode - 1 - msg);
+            }
+            cobsDecodeReset();
+            return; // need to return here, because of block--
+        }
+    }
+    block--;
+}
+
+void cobsDecode(uint8_t *buf, int len)
+{
+    for (int i = 0; i < len; i++)
+    {
+        cobsDecodeByte(buf[i]);
+    }
+}
+
+size_t cobsEncode(const void *data, size_t length, uint8_t *buffer)
+{
+    uint8_t *encode = buffer;  // Encoded byte pointer
+    uint8_t *codep = encode++; // Output code pointer
+    uint8_t code = 1;          // Code value
+
+    for (const uint8_t *byte = (const uint8_t *)data; length--; ++byte)
+    {
+        if (*byte) // Byte not zero, write it
+            *encode++ = *byte, ++code;
+
+        if (!*byte || code == 0xff) // Input is zero or block completed, restart
+        {
+            *codep = code, code = 1, codep = encode;
+            if (!*byte || length)
+                ++encode;
+        }
+    }
+    *codep = code; // Write final code value
+
+    // add final 0
+    *encode++ = 0x00;
+
+    return encode - buffer;
+}
+
+int linkWrite(LoToHi *m)
+{
+
+    ESP_LOGI(TAG, "linkWrite");
+    uint8_t tx_packet_buf[200];
+    uint8_t encode_buf[208];
+    pb_ostream_t ostream = pb_ostream_from_buffer(tx_packet_buf, sizeof(tx_packet_buf) - 4);
+    bool status = pb_encode(&ostream, LoToHi_fields, m);
+
+    if (!status)
+    {
+        // couldn't encode
+        return false;
+    }
+
+    size_t tx_payload_len = ostream.bytes_written;
+
+    // add crc32 (CRC-32/JAMCRC)
+    uint32_t crc = crc32(tx_packet_buf, tx_payload_len);
+
+    for (int byte_pos = 0; byte_pos < 4; ++byte_pos)
+    {
+        tx_packet_buf[tx_payload_len] = (uint8_t)crc & 0xFF;
+        crc = crc >> 8;
+        tx_payload_len++;
+    }
+    size_t tx_encode_len = cobsEncode(tx_packet_buf, tx_payload_len, encode_buf);
+    const int txBytes = uart_write_bytes(UART_NUM_2, encode_buf, tx_encode_len);
+    return txBytes;
+}
+
+void send_time_stamp()
+{
+    ESP_LOGI(TAG, "send_time_stamp");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_time_stamp_tag;
+    msg_out.payload.time_stamp = esp_timer_get_time() / 1000;
+    linkWrite(&msg_out);
+    printf("time stamp sent %i.\n", (int)msg_out.payload.time_stamp);
+}
+
+void send_relais_state(bool on)
+{
+    ESP_LOGI(TAG, "send_relais_state");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_relais_state_tag;
+    msg_out.payload.relais_state = on;
+    linkWrite(&msg_out);
+}
+
+void send_error_flags(ErrorFlags e)
+{
+    ESP_LOGI(TAG, "send_error_flags");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_error_flags_tag;
+    msg_out.payload.error_flags = e;
+    linkWrite(&msg_out);
+}
+
+void send_cp_state(CpState cp_state)
+{
+    ESP_LOGI(TAG, "send_cp_state");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_cp_state_tag;
+    msg_out.payload.cp_state = cp_state;
+    linkWrite(&msg_out);
+}
+
+void send_pp_state(PpState pp_state)
+{
+    ESP_LOGI(TAG, "send_pp_state");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_pp_state_tag;
+    msg_out.payload.pp_state = pp_state;
+    linkWrite(&msg_out);
+}
+
+void send_max_charging_current(uint32_t max_charging_current)
+{
+    ESP_LOGI(TAG, "send_max_charging_current");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_max_charging_current_tag;
+    msg_out.payload.max_charging_current = max_charging_current;
+    linkWrite(&msg_out);
+}
+
+void send_max_grid_current(uint32_t max_grid_current)
+{
+    ESP_LOGI(TAG, "send_max_grid_current");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_max_grid_current_tag;
+    msg_out.payload.max_grid_current = max_grid_current;
+    linkWrite(&msg_out);
+}
+
+void send_lock_state(LockState lock_state)
+{
+    ESP_LOGI(TAG, "send_lock_state");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_lock_state_tag;
+    msg_out.payload.lock_state = lock_state;
+    linkWrite(&msg_out);
+}
+
+void send_power_meter(PowerMeter p)
+{
+    ESP_LOGI(TAG, "send_power_meter");
+    LoToHi msg_out = LoToHi_init_default;
+    msg_out.which_payload = LoToHi_power_meter_tag;
+    msg_out.payload.power_meter = p;
+    linkWrite(&msg_out);
+}
+
+void handlePacket(uint8_t *buf, int len)
+{
+    // Check CRC32 (last 4 bytes)
+    //  uint32_t crc = calculateCrc(rx_packet_buf, rx_packet_len);
+    if (crc32(buf, len))
+    {
+        printf("CRC mismatch\n");
+        return;
+    }
+
+    len -= 4;
+
+    HiToLo msg_in;
+
+    pb_istream_t istream = pb_istream_from_buffer(buf, len);
+
+    if (pb_decode(&istream, HiToLo_fields, &msg_in))
+    {
+        // printf("RemoteControl recvd %i \n", msg_in.which_payload);
+
+        switch (msg_in.which_payload)
+        {
+        case HiToLo_time_stamp_tag:
+            printf("Received time stamp tag \n");
+            break;
+        case HiToLo_connector_lock_tag:
+            printf("Received connector_lock %i\n", (int)msg_in.payload.connector_lock);
+            break;
+        case HiToLo_max_charging_current_tag:
+            printf("Received max_charging_current %i\n",
+                   (int)msg_in.payload.max_charging_current);
+            evse_set_max_charging_current((int)msg_in.payload.max_charging_current);
+            break;
+        case HiToLo_max_grid_current_tag:
+            printf("Received max_grid_current %i\n",
+                   (int)msg_in.payload.max_grid_current);
+            grid_set_max_current((int)msg_in.payload.max_grid_current);
+            break;
+        case HiToLo_allow_power_on_tag:
+            printf("Received allow_poweron %i\n",
+                   (int)msg_in.payload.allow_power_on);
+            break;
+        case HiToLo_reset_tag:
+            printf("Received reset\n");
+            break;
+        case HiToLo_grid_current_tag:
+            printf("Received grid_current %i\n",
+                   (int)msg_in.payload.grid_current);
+
+            setMaxGridCurrent(grid_get_max_current() * 10);
+            setLiveGridCurrent((int)msg_in.payload.grid_current);
+
+            break;
+        default:
+            // printf("not found");
+            printf("Not Found RemoteControl recvd %i \n", msg_in.which_payload);
+            break;
+        }
+    }
+}
+
+/*
+const int evse_state_to_int(evse_state_t state)
+{
+    switch (state)
+    {
+    case EVSE_STATE_A:
+        return 1;
+    case EVSE_STATE_B1:
+        return 2;
+    case EVSE_STATE_B2:
+        return 3;
+    case EVSE_STATE_C1:
+        return 4;
+    case EVSE_STATE_C2:
+        return 5;
+    case EVSE_STATE_D1:
+        return 6;
+    case EVSE_STATE_D2:
+        return 7;
+    case EVSE_STATE_E:
+        return 8;
+    case EVSE_STATE_F:
+        return 9;
+    default:
+        return 9;
+    }
+}
+*/
+
+CpState evse_state_to_cpState(evse_state_t state)
+{
+    switch (state)
+    {
+    case EVSE_STATE_A:
+        return CpState_EVSE_STATE_A;
+    case EVSE_STATE_B1:
+        return CpState_EVSE_STATE_B1;
+    case EVSE_STATE_B2:
+        return CpState_EVSE_STATE_B2;
+    case EVSE_STATE_C1:
+        return CpState_EVSE_STATE_C1;
+    case EVSE_STATE_C2:
+        return CpState_EVSE_STATE_C2;
+    case EVSE_STATE_D1:
+        return CpState_EVSE_STATE_D1;
+    case EVSE_STATE_D2:
+        return CpState_EVSE_STATE_D2;
+    case EVSE_STATE_E:
+        return CpState_EVSE_STATE_E;
+    case EVSE_STATE_F:
+        return CpState_EVSE_STATE_F;
+    default:
+        return CpState_EVSE_STATE_F;
+    }
+}
+
+static void tx_task(void *arg)
+{
+
+    /*
+    error_flags.connector_lock_failed = false;
+    error_flags.cp_signal_fault = false;
+    error_flags.diode_fault = false;
+    error_flags.rcd_selftest_failed = false;
+    error_flags.rcd_triggered = false;
+    error_flags.ventilation_not_available = false;
+    */
+
+    while (1)
+    {
+        // send_time_stamp();
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        // send_relais_state(false);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        // send_error_flags(error_flags);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        send_cp_state(evse_state_to_cpState(evse_get_state()));
+        vTaskDelay(5000 / portTICK_PERIOD_MS);
+
+        // send_pp_state(PpState_STATE_32A);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        send_max_charging_current(evse_get_max_charging_current());
+        vTaskDelay(5000 / portTICK_PERIOD_MS);
+
+
+        send_max_grid_current(grid_get_max_current());
+        vTaskDelay(5000 / portTICK_PERIOD_MS);
+
+        // send_lock_state(false);
+        // vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        /*
+                PowerMeter p;
+                p.vrmsL1 = 230;
+                p.vrmsL2 = 230;
+                p.vrmsL3 = 230;
+                p.irmsL1 = 0;
+                p.irmsL2 = 0;
+                p.irmsL3 = 0;
+                p.irmsN = 0;
+                p.wattHrL1 = 0;
+                p.wattHrL2 = 0;
+                p.wattHrL3 = 0;
+                p.totalWattHr = 0;
+
+                p.tempL1 = 20;
+                p.tempL2 = 20;
+                p.tempL3 = 20;
+                p.tempN = 20;
+
+                p.wattL1 = 0;
+                p.wattL2 = 0;
+                p.wattL3 = 0;
+
+                p.freqL1 = 50;
+                p.freqL2 = 50;
+                p.freqL3 = 50;
+
+                p.phaseSeqError = 0;
+
+                // send_power_meter(p);
+                // vTaskDelay(1000 / portTICK_PERIOD_MS);
+                */
+    }
+}
+
+static void rx_task(void *arg)
+{
+    uint8_t *data = (uint8_t *)malloc(RX_BUF_SIZE + 1);
+    while (1)
+    {
+        const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 1000 / portTICK_PERIOD_MS);
+        if (rxBytes > 0)
+        {
+            data[rxBytes] = 0;
+            // ESP_LOGI(TAG, "Read %d bytes: '%s'", rxBytes, data);
+            // ESP_LOG_BUFFER_HEXDUMP(TAG, data, rxBytes, ESP_LOG_INFO);
+            cobsDecode(data, rxBytes);
+        }
+    }
+    free(data);
+}
+
+void slave_sync_start()
+{
+
+    ESP_LOGI(TAG, "Starting SYNC Serial");
+
+    init();
+    xTaskCreate(rx_task, "uart_rx_task", 1024 * 5, NULL, 5, NULL);
+    xTaskCreate(tx_task, "uart_tx_task", 1024 * 5, NULL, 5, NULL);
+}
+
+void slave_sync_stop(void)
+{
+
+    /*
+    ESP_LOGI(TAG, "Stopping");
+
+    if (rx_task)
+    {
+        vTaskDelete(rx_task);
+        rx_task = NULL;
+    }
+
+    if (tx_task)
+    {
+        vTaskDelete(tx_task);
+        tx_task = NULL;
+    }
+
+    if (port != -1)
+    {
+        uart_driver_delete(port);
+        port = -1;
+    }*/
+}