timer.c

STM32单片机IAP程序

#include "timer.h"

static Timer_typedef TimerList[10];

void TIMER_TimerInitialisation(void)
{
	u8 i = 0;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    
    TIM_DeInit(TIM2);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
	
    TIM_TimeBaseStructure.TIM_Period = 2;                        	// 最大计数值,根据设定的分频，time=1即为0.5ms      
    TIM_TimeBaseStructure.TIM_Prescaler = 36000-1;                  // 分频36000
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;         // 时钟分割  
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;     // 计数方向向上计数
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

	TIM_SetAutoreload(TIM2, 2); 
	TIM_ARRPreloadConfig(TIM2, ENABLE); 

    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);  
    TIM_Cmd(TIM2, ENABLE);	
	
	for(i = 0; i < 10; i++)
	{
		TimerList[i].Timeoutcnt = 1000001;
		TimerList[i].Timeout = 1000001;
		TimerList[i].Timeoutfuc = (void*)0;
		TimerList[i].Parameter = (void*)0;
	} 
}


void TIMER_TimerStart(u8 TimerIdent, u32 TimeOut, void (*Timeoutfuc)(void* parameter), void* parameter, u8 flag)
{
	if(TimerIdent > 9)
	{
		return;
	}
	
	__disable_irq();
	
	TimerList[TimerIdent].Timeoutcnt = TimeOut;
	TimerList[TimerIdent].Timeout = TimeOut;
	TimerList[TimerIdent].Timeoutfuc = Timeoutfuc;
	TimerList[TimerIdent].Parameter = parameter;
	TimerList[TimerIdent].Timerflag = flag;
	
	__enable_irq();
}


void TIMER_Execute(void)
{
	u8 i = 0;															
	for(i = 0; i < 10; i++)												
	{
		if((TimerList[i].Timeoutcnt != 0) && (TimerList[i].Timeoutcnt <= 1000000))
		{
			TimerList[i].Timeoutcnt--;										
			if(TimerList[i].Timeoutcnt == 0)								
			{
				if(TimerList[i].Timerflag != TIMER_PERIOD)				
				{
					TimerList[i].Timeoutcnt = 1000001;						
				}
				else
				{
					TimerList[i].Timeoutcnt = TimerList[i].Timeout;			
				}
				TimerList[i].Timeoutfuc(TimerList[i].Parameter);				
			}
		}
	}
}