esp-idf/components/freemodbus/port/porttimer.c

128 lines
4.3 KiB
C

/*
* 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
}