STM32外部中断无法触发 - - Powered by Discuz!

以下是我外部中断的函数我就想问为什么外部中断无法触发呢我直接都把引脚接3.3V了还是无法触发我IO口PDin4和5配置的都是下拉 PBin12和13配置的是上拉。请问为什么触发不成功啊。。求教求教
void EXTI0_IRQHandler(void)
{
delay_ms(10); //消抖
if(PDin(4)==1)
{
left();
}
EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位
}
//外部中断2服务程序
void EXTI2_IRQHandler(void)
{
delay_ms(10); //消抖
if(PDin(5)==1)
{
right();
}
EXTI_ClearITPendingBit(EXTI_Line2);//清除LINE2上的中断标志位
}
//外部中断3服务程序
void EXTI3_IRQHandler(void)
{
delay_ms(10); //消抖
if(PBin(12)==0)
{
stop();
chuansongdai_work(1);
if(PBin(13)==0)
{
chuansongdai_work(3); //传送带停
}
}
EXTI_ClearITPendingBit(EXTI_Line3); //清除LINE3上的中断标志位
}
//外部中断4服务程序
void EXTI4_IRQHandler(void)
{
delay_ms(10); //消抖
EXTI_ClearITPendingBit(EXTI_Line4);//清除LINE4上的中断标志位
}
//外部中断初始化程序
//初始化PE2~4,PA0为中断输入.
void EXTIX_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
//KEY_Init(); //按键对应的IO口初始化
hongwai_init();
huidu_init();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//使能SYSCFG时钟
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource12);//PE2 连接到中断线2
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource13);//PE3 连接到中断线3
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource5);//PE4 连接到中断线4
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource4);//PA0 连接到中断线0
/* 配置EXTI_Line0 */
EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line4;//LINE0
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //上升沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;//使能LINE0
EXTI_Init(&EXTI_InitStructure);//配置
/* 配置EXTI_Line2,3,4 */
EXTI_InitStructure.EXTI_Line = EXTI_Line2 | EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;//中断线使能
EXTI_Init(&EXTI_InitStructure);//配置
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;//外部中断0
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;//抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;//外部中断2
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;//抢占优先级0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;//外部中断3
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;//抢占优先1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;//外部中断4
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;//抢占优先级1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
}

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