150 lines
4.7 KiB
C
Executable File
150 lines
4.7 KiB
C
Executable File
#include "evse_api.h"
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#include "evse_state.h"
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#include "evse_events.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/portmacro.h"
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#include "esp_log.h"
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// =========================
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// Internal State Variables
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// =========================
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static evse_state_t current_state = EVSE_STATE_A;
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static bool is_authorized = false;
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static TickType_t session_start_tick = 0;
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static portMUX_TYPE state_mux = portMUX_INITIALIZER_UNLOCKED;
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// =========================
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// Internal Mapping
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// =========================
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static evse_state_event_t map_state_to_event(evse_state_t s) {
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switch (s) {
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case EVSE_STATE_A: return EVSE_STATE_EVENT_IDLE;
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case EVSE_STATE_B1: return EVSE_STATE_EVENT_WAITING;
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case EVSE_STATE_B2:
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case EVSE_STATE_C1:
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case EVSE_STATE_C2: return EVSE_STATE_EVENT_CHARGING;
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case EVSE_STATE_E:
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case EVSE_STATE_F: return EVSE_STATE_EVENT_FAULT;
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default: return EVSE_STATE_EVENT_IDLE;
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}
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}
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// =========================
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// Public API
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// =========================
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void evse_set_state(evse_state_t state) {
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bool changed = false;
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evse_state_t previous_state;
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portENTER_CRITICAL(&state_mux);
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previous_state = current_state;
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if (state != current_state) {
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current_state = state;
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changed = true;
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// When entering a charging state, record the start tick
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if (evse_state_is_charging(state) && !evse_state_is_charging(previous_state)) {
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session_start_tick = xTaskGetTickCount();
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}
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// When exiting a charging state, reset the start tick
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else if (!evse_state_is_charging(state) && evse_state_is_charging(previous_state)) {
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session_start_tick = 0;
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}
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}
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portEXIT_CRITICAL(&state_mux);
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if (changed) {
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ESP_LOGI("EVSE_STATE", "State changed from %s to %s",
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evse_state_to_str(previous_state),
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evse_state_to_str(state));
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evse_state_event_data_t evt = {
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.state = map_state_to_event(state)
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};
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esp_event_post(EVSE_EVENTS,
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EVSE_EVENT_STATE_CHANGED,
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&evt,
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sizeof(evt),
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portMAX_DELAY);
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}
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}
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evse_state_t evse_get_state(void) {
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portENTER_CRITICAL(&state_mux);
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evse_state_t s = current_state;
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portEXIT_CRITICAL(&state_mux);
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return s;
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}
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TickType_t evse_get_session_start(void) {
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portENTER_CRITICAL(&state_mux);
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TickType_t t = session_start_tick;
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portEXIT_CRITICAL(&state_mux);
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return t;
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}
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const char* evse_state_to_str(evse_state_t state) {
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switch (state) {
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case EVSE_STATE_A: return "A - EV Not Connected (12V)";
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case EVSE_STATE_B1: return "B1 - EV Connected (9V, Not Authorized)";
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case EVSE_STATE_B2: return "B2 - EV Connected (9V, Authorized and Ready)";
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case EVSE_STATE_C1: return "C1 - Charging Requested (6V, Relay Off)";
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case EVSE_STATE_C2: return "C2 - Charging Active (6V, Relay On)";
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case EVSE_STATE_D1: return "D1 - Ventilation Required (3V, Relay Off)";
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case EVSE_STATE_D2: return "D2 - Ventilation Active (3V, Relay On)";
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case EVSE_STATE_E: return "E - Error: Control Pilot Shorted to Ground (0V)";
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case EVSE_STATE_F: return "F - Fault: EVSE Unavailable or No Pilot Signal";
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default: return "Unknown State";
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}
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}
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void evse_state_init(void) {
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portENTER_CRITICAL(&state_mux);
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current_state = EVSE_STATE_A;
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session_start_tick = xTaskGetTickCount();
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is_authorized = true;
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portEXIT_CRITICAL(&state_mux);
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ESP_LOGI("EVSE_STATE", "Initialized in state: %s", evse_state_to_str(current_state));
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evse_state_event_data_t evt = {
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.state = map_state_to_event(current_state)
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};
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esp_event_post(EVSE_EVENTS, EVSE_EVENT_INIT, &evt, sizeof(evt), portMAX_DELAY);
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}
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void evse_state_tick(void) {
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// Placeholder for future state logic
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}
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bool evse_state_is_charging(evse_state_t state) {
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return state == EVSE_STATE_C1 || state == EVSE_STATE_C2;
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}
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bool evse_state_is_plugged(evse_state_t state) {
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return state == EVSE_STATE_B1 || state == EVSE_STATE_B2 ||
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state == EVSE_STATE_C1 || state == EVSE_STATE_C2 ||
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state == EVSE_STATE_D1 || state == EVSE_STATE_D2;
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}
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bool evse_state_is_session(evse_state_t state) {
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return state == EVSE_STATE_B2 || state == EVSE_STATE_C1 || state == EVSE_STATE_C2;
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}
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void evse_state_set_authorized(bool authorized) {
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portENTER_CRITICAL(&state_mux);
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is_authorized = authorized;
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portEXIT_CRITICAL(&state_mux);
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}
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bool evse_state_get_authorized(void) {
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portENTER_CRITICAL(&state_mux);
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bool result = is_authorized;
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portEXIT_CRITICAL(&state_mux);
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return result;
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}
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