STM32F407正点原子提供的配套代码为什么使用库函数，就无法进入中断？？求解析

[Luke_Lx]

void LED_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);
//GPIOF9,F10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOF, &GPIO_InitStructure);
GPIO_SetBits(GPIOF,GPIO_Pin_9 | GPIO_Pin_10);

}

void TIM3_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler=psc;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);

TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
TIM_Cmd(TIM3,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x03;
NVIC_Init(&NVIC_InitStructure);

}

//定时器处理代码
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET)
{
GPIO_SetBits(GPIOF, GPIO_Pin_10);
}
TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
}

int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
// delay_init(168);
LED_Init();

TIM3_Int_Init(5000-1,8400-1);
while(1)
{
GPIO_ResetBits(GPIOF, GPIO_Pin_10);
};
}

[Aexisun]

请问你时钟树配置好了吗?PPL 时钟源 用人家代码就都用,

[zh59100058]

系统的时钟设置，NVIC的分组也要设置, 测试中断时，最好用PF10引脚的取反来做