porttimer_m.c
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/*
* FreeModbus Libary: RT-Thread Port
* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* File: $Id: porttimer_m.c,v 1.60 2013/08/13 15:07:05 Armink add Master Functions$
*/
/* ----------------------- Platform includes --------------------------------*/
#include "port.h"
/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mb_m.h"
#include "mbport.h"
#include "mbconfig.h"
#if MB_MASTER_RTU_ENABLED > 0 || MB_MASTER_ASCII_ENABLED > 0
/* ----------------------- Variables ----------------------------------------*/
//static USHORT usT35TimeOut50us;
//static struct rt_timer timer;
//static void prvvTIMERExpiredISR(void);
//static void timer_timeout_ind(void* parameter);
/* ----------------------- static functions ---------------------------------*/
static void prvvTIMERExpiredISR(void);
/* ----------------------- Start implementation -----------------------------*/
BOOL xMBMasterPortTimersInit(USHORT usTimeOut50us)
{
int Period,prescaler;
if(usTimeOut50us == 0) //做主机
{
Period = 200;
prescaler = 21000 - 1;
}
else //做从机
{
Period = 20;
prescaler = 2100 - 1;
}
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = Period;//20;
//100ms计时一次
TIM_TimeBaseStructure.TIM_Prescaler = prescaler;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ARRPreloadConfig(TIM2, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 11; //优先级要比串口低
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
TIM_Cmd(TIM2, ENABLE);
return TRUE;
}
void vMBMasterPortTimersT35Enable()
{
// u32 timer_tick = (50 * usT35TimeOut50us)
// / (1000 * 1000 / RT_TICK_PER_SECOND);
/* Set current timer mode, don't change it.*/
vMBMasterSetCurTimerMode(MB_TMODE_T35);
/* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_SetCounter(TIM2, 0);
//TIM_Cmd(TIM2, ENABLE);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
// rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
// rt_timer_start(&timer);
}
void vMBMasterPortTimersConvertDelayEnable()
{
// rt_tick_t timer_tick = MB_MASTER_DELAY_MS_CONVERT * RT_TICK_PER_SECOND / 1000;
// /* Set current timer mode, don't change it.*/
vMBMasterSetCurTimerMode(MB_TMODE_CONVERT_DELAY);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_SetCounter(TIM2, 0);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
// rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
// rt_timer_start(&timer);
}
void vMBMasterPortTimersRespondTimeoutEnable()
{
// rt_tick_t timer_tick = MB_MASTER_TIMEOUT_MS_RESPOND * RT_TICK_PER_SECOND / 1000;
// /* Set current timer mode, don't change it.*/
vMBMasterSetCurTimerMode(MB_TMODE_RESPOND_TIMEOUT);
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
TIM_SetCounter(TIM2, 0);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
// rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
// rt_timer_start(&timer);
}
void vMBMasterPortTimersDisable()
{
/* Disable any pending timers. */
TIM_SetCounter(TIM2, 0);
//TIM_Cmd(TIM2, DISABLE);
TIM_ITConfig(TIM2, TIM_IT_Update, DISABLE);
//rt_timer_stop(&timer);
}
void prvvTIMERExpiredISR(void)
{
(void) pxMBMasterPortCBTimerExpired();
}
static void timer_timeout_ind(void* parameter)
{
prvvTIMERExpiredISR();
}
//定时器2 中断函数
void TIM2_IRQHandler(void)
{
CPU_SR_ALLOC();
CPU_CRITICAL_ENTER();
OSIntEnter();
CPU_CRITICAL_EXIT();
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
prvvTIMERExpiredISR();
}
OSIntExit();
}
#endif