/* * 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 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 }