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