player/Project/Src/Drive/Source/tim.c

#include "base.h"
#include "timer.h"





static TIMER_UserStruct g_timer[9]={0};










/*
@初始化通用定时器
@TIM2\TIM3\TIM4\TIM5\TIM6\TIM7\TIM12\TIM13\TIM14
*/
int TIMER_InitNormal (TIMER_InitStruct *init)
{
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	u16 arr;u16 psc;
	if (init==0) return -1;
	if (init->Cycle>60000)//定时时间大于60毫秒
	{
		//psc=84*500-1;			//每100us计数器加1
		psc=90*100-1;
		arr=init->Cycle/100-1;
	}
	else 
	{
		//u16 t=60000/(init->Cycle*84)+1;
		//psc=84/t-1;
		u16 t=60000/(init->Cycle*90)+1;
		psc=90/t-1;
		arr=t*init->Cycle-1;
	}
	
	u32 timer=(u32)(init->Tim-TIM2)/(TIM3-TIM2);
	if (init->UpdataCall)
	{
		g_timer[timer].UpdataCall=init->UpdataCall;
		g_timer[timer].Inited=1;
	}
	
	RCC_APB1PeriphClockCmd(1<<timer,ENABLE); 
	
  TIM_TimeBaseInitStructure.TIM_Period = arr; 	//自动重装载值
	TIM_TimeBaseInitStructure.TIM_Prescaler=psc;  //定时器分频
	TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数模式
	TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1; 
	
	TIM_TimeBaseInit(init->Tim,&TIM_TimeBaseInitStructure);//初始化TIM
	
	TIM_ITConfig(init->Tim,TIM_IT_Update,ENABLE); //允许定时器更新中断
	TIM_Cmd(init->Tim,ENABLE); //使能定时器3
	
	u8 irq_num=0;
	if (init->Tim==TIM2)
	{
		irq_num=TIM2_IRQn;
	}
	else if (init->Tim==TIM3)
	{
		irq_num=TIM3_IRQn;
	}
	else if (init->Tim==TIM4)
	{
		irq_num=TIM4_IRQn;
	}
	else if (init->Tim==TIM5)
	{
		irq_num=TIM5_IRQn;
	}
	else if (init->Tim==TIM6)
	{
		//irq_num=TIM6_IRQn;
	}
	else if (init->Tim==TIM7)
	{
		irq_num=TIM7_IRQn;
	}
	else if (init->Tim==TIM12)
	{
		//irq_num=TIM12_IRQn;
	}
	else if (init->Tim==TIM13)
	{
		//irq_num=TIM13_IRQn;
	}
	else if (init->Tim==TIM14)
	{
		//irq_num=TIM14_IRQn;
	}
	
	
	
	NVIC_InitStructure.NVIC_IRQChannel=irq_num; //定时器中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x01; //抢占优先级1
	NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x03; //子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	return 0;
}




void TIMER_DeInit (TIM_TypeDef* TIMx)
{
	TIM_DeInit (TIMx);
	u32 timer=(u32)(TIMx-TIM2)/(TIM3-TIM2);
	
	RCC_APB1PeriphClockCmd(1<<timer,DISABLE); 
	g_timer[timer].UpdataCall=0;
	g_timer[timer].Inited=0;
}







void TIM2_IRQHandler (void)
{
	const TIM_TypeDef *timer=TIM2;
	const u8 timer_num=0;
	if(TIM_GetITStatus((TIM_TypeDef *)timer,TIM_IT_Update)==SET) //溢出中断
	{
		if (g_timer[timer_num].Inited==1)
		{
			g_timer[timer_num].UpdataCall();
		}
		TIM_ClearITPendingBit((TIM_TypeDef *)timer,TIM_IT_Update);  //清除中断标志位
	}
	
}
void TIM3_IRQHandler (void)
{
	const TIM_TypeDef *timer=TIM3;
	const u8 timer_num=1;
	if(TIM_GetITStatus((TIM_TypeDef *)timer,TIM_IT_Update)==SET) //溢出中断
	{
		if (g_timer[timer_num].Inited==1)
		{
			g_timer[timer_num].UpdataCall();
		}
		TIM_ClearITPendingBit((TIM_TypeDef *)timer,TIM_IT_Update);  //清除中断标志位
	}
}
void TIM4_IRQHandler (void)
{
	const TIM_TypeDef *timer=TIM4;
	const u8 timer_num=2;
	if(TIM_GetITStatus((TIM_TypeDef *)timer,TIM_IT_Update)==SET) //溢出中断
	{
		if (g_timer[timer_num].Inited==1)
		{
			g_timer[timer_num].UpdataCall();
		}
		TIM_ClearITPendingBit((TIM_TypeDef *)timer,TIM_IT_Update);  //清除中断标志位
	}
}
void TIM5_IRQHandler (void)
{
	const TIM_TypeDef *timer=TIM5;
	const u8 timer_num=3;
	if(TIM_GetITStatus((TIM_TypeDef *)timer,TIM_IT_Update)==SET) //溢出中断
	{
		if (g_timer[timer_num].Inited==1)
		{
			g_timer[timer_num].UpdataCall();
		}
		TIM_ClearITPendingBit((TIM_TypeDef *)timer,TIM_IT_Update);  //清除中断标志位
	}
}
void TIM7_IRQHandler (void)
{
	const TIM_TypeDef *timer=TIM7;
	const u8 timer_num=5;
	if(TIM_GetITStatus((TIM_TypeDef *)timer,TIM_IT_Update)==SET) //溢出中断
	{
		if (g_timer[timer_num].Inited==1)
		{
			g_timer[timer_num].UpdataCall();
		}
		TIM_ClearITPendingBit((TIM_TypeDef *)timer,TIM_IT_Update);  //清除中断标志位
	}
}