STM32F7xx外设驱动4-timer（寄存器）

//源文件

void TimerPhyConfig()
{
   RCC->APB1ENR |= (1<<1);    //使能Timer3
	
	 TIM3->ARR = arr;
	 TIM3->PSC = psc;
	 TIM3->DIER = (1<<0);    //Update interrupt enabled
	 TIM3->CR1 |= (1<<0);    //Counter enabled
	 TIM3->CR1 &= ~(1<<4);   //Counter used as upcounter

	 HAL_NVIC_EnableIRQ(TIM3_IRQn);
}

void TIM3_IRQHandler(void)
{
	if(TIM3->SR&0X0001)//溢出中断
	{
		 LD1_TURN;
		 LD2_TURN;
		 LD3_TURN;
	}
	TIM3->SR&=~(1<<0);//清除中断标志位
}


//头文件
/*****************************timer************************************/
#define SET500MS

#ifdef  SET500MS
	#define 	arr   (5000-1)
	#define  	psc   (10800-1)
#endif
#ifdef  SET1000MS
	#define 	arr   (5000-1)
	#define  	psc   (10800-1)
#endif

void TimerPhyConfig();
/**********************************************************************/