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managed_components/espressif__esp-modbus/freemodbus/port/porttimer.c

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+/*
+ * SPDX-FileCopyrightText: 2010 Christian Walter
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * SPDX-FileContributor: 2016-2021 Espressif Systems (Shanghai) CO LTD
+ */
+/*
+ * FreeModbus Libary: ESP32 Port Demo Application
+ * Copyright (C) 2010 Christian Walter <cwalter@embedded-solutions.at>
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * IF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * File: $Id: portother.c,v 1.1 2010/06/06 13:07:20 wolti Exp $
+ */
+/* ----------------------- Platform includes --------------------------------*/
+#include "port.h"
+
+/* ----------------------- Modbus includes ----------------------------------*/
+#include "mb.h"
+#include "mbport.h"
+#include "sdkconfig.h"
+
+#if CONFIG_FMB_TIMER_PORT_ENABLED
+
+static const char *TAG = "MBS_TIMER";
+
+static xTimerContext_t* pxTimerContext = NULL;
+
+/* ----------------------- Start implementation -----------------------------*/
+static void IRAM_ATTR vTimerAlarmCBHandler(void *param)
+{
+    pxMBPortCBTimerExpired(); // Timer expired callback function
+    pxTimerContext->xTimerState = TRUE;
+    ESP_EARLY_LOGD(TAG, "Slave timeout triggered.");
+}
+#endif
+
+BOOL xMBPortTimersInit(USHORT usTimeOut50us)
+{
+#if CONFIG_FMB_TIMER_PORT_ENABLED
+    MB_PORT_CHECK((usTimeOut50us > 0), FALSE,
+            "Modbus timeout discreet is incorrect.");
+    MB_PORT_CHECK(!pxTimerContext, FALSE,
+                "Modbus timer is already created.");
+    pxTimerContext = calloc(1, sizeof(xTimerContext_t));
+    if (!pxTimerContext) {
+        return FALSE;
+    }
+    pxTimerContext->xTimerIntHandle = NULL;
+    // Save timer reload value for Modbus T35 period
+    pxTimerContext->usT35Ticks = usTimeOut50us;
+    esp_timer_create_args_t xTimerConf = {
+        .callback = vTimerAlarmCBHandler,
+        .arg = NULL,
+#if (MB_TIMER_SUPPORTS_ISR_DISPATCH_METHOD && CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD)
+        .dispatch_method = ESP_TIMER_ISR,
+#else
+        .dispatch_method = ESP_TIMER_TASK,
+#endif
+        .name = "MBS_T35timer"
+    };
+    // Create Modbus timer
+    esp_err_t xErr = esp_timer_create(&xTimerConf, &(pxTimerContext->xTimerIntHandle));
+    if (xErr) {
+        return FALSE;
+    }
+#endif
+    return TRUE;
+}
+
+void vMBPortTimersEnable(void)
+{
+#if CONFIG_FMB_TIMER_PORT_ENABLED
+    MB_PORT_CHECK((pxTimerContext && pxTimerContext->xTimerIntHandle), ; ,
+                                "timer is not initialized.");
+    uint64_t xToutUs = (pxTimerContext->usT35Ticks * MB_TIMER_TICK_TIME_US);
+    esp_timer_stop(pxTimerContext->xTimerIntHandle);
+    esp_timer_start_once(pxTimerContext->xTimerIntHandle, xToutUs);
+    pxTimerContext->xTimerState = FALSE;
+#endif
+}
+
+void MB_PORT_ISR_ATTR
+vMBPortTimersDisable(void)
+{
+#if CONFIG_FMB_TIMER_PORT_ENABLED
+    // Disable timer alarm
+    esp_timer_stop(pxTimerContext->xTimerIntHandle);
+#endif
+}
+
+void vMBPortTimerClose(void)
+{
+#if CONFIG_FMB_TIMER_PORT_ENABLED
+    // Delete active timer
+    if (pxTimerContext) {
+        if (pxTimerContext->xTimerIntHandle) {
+            esp_timer_stop(pxTimerContext->xTimerIntHandle);
+            esp_timer_delete(pxTimerContext->xTimerIntHandle);
+        }
+        free(pxTimerContext);
+        pxTimerContext = NULL;
+    }
+#endif
+}
+
+void vMBPortTimersDelay(USHORT usTimeOutMS)
+{
+    vTaskDelay(usTimeOutMS / portTICK_PERIOD_MS);
+}