配置LED灯

//PC13

void LED_Init(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

配置定时器1

void TIM2_Init(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

//使能定时器1的时钟

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

TIM_TimeBaseStructure.TIM_Period = (10000-1);//ARR

TIM_TimeBaseStructure.TIM_Prescaler = (7200-1);//PSC

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM1, & TIM_TimeBaseStructure);

//使能定时器1的中断

TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);

//配置定时器1的中断优先等级

NVIC_InitStructure.NVIC_IRQChannel = TIM1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

//使能定时器1

TIM_Cmd(TIM1,ENABLE);

}

主函数

int main(void)

{

NVIC_Configuration();

LED_Init();

TIM2_Init();

while(1)

{

}

}

void TIM1_UP_IRQHandler(void)

{

TIM_ClearFlag(TIM1,TIM_FLAG_Update);

LED = ~LED;

}