[嵌入式]STM32f407zgt6定时器9初始化

void TIM9_Int_Init(u16 arr,u16 psc)
{
	 TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9,ENABLE);  
	
  TIM_TimeBaseInitStructure.TIM_Period = arr; 	
	TIM_TimeBaseInitStructure.TIM_Prescaler=psc;  
	TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;
	TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1; 
	TIM_TimeBaseInit(TIM9,&TIM_TimeBaseInitStructure);
	
	TIM_ITConfig(TIM9,TIM_IT_Update,ENABLE); 
	TIM_Cmd(TIM9,ENABLE); 
	
	NVIC_InitStructure.NVIC_IRQChannel=TIM1_BRK_TIM9_IRQn; 
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x00; 
	NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x03; 
	NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	
}

void TIM1_BRK_TIM9_IRQHandler(void)
{
	if(TIM_GetITStatus(TIM9,TIM_IT_Update)==SET)
	{
		 LED0=!LED0;
	}
	TIM_ClearITPendingBit(TIM9,TIM_IT_Update);  
}