STM32进不去外部中断
void device_init()
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//GPIO_SetBits(GPIOB, GPIO_Pin_15);
}
void EXTIX_Init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
device_init(); // 初始化IO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟
//GPIOB.15 中断线以及中断初始化配置 下降沿触发
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource15);
EXTI_InitStructure.EXTI_Line=EXTI_Line15;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; //中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2,
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure);
}
void EXTI15_10_IRQHandler()
{
if(EXTI_GetITStatus(EXTI_Line15)!=RESET)
{
delay_ms(10);//消抖
if(DEVIN==0) //
{
printf("sus");
}
EXTI_ClearITPendingBit(EXTI_Line15); //清除LINE15上的中断标志位
}
}
一下午没找到原因,外部中断进不去,是需要设置那里吗,STM32F103C8 28引脚。