ST意法半导体中文论坛外部中断只能响应一次，求大神指点！

外部中断只能响应一次，求大神指点！

eason1931 提问时间：2014-11-25 10:48 /

问答
是否解决:

使用PB12,PB13,PE14,PE15作为外部中断，PE14，PE15响应正常，但PB12,PB13无法正常进入中断，代码如下，求指点。。

void EXTI15_10_IRQHandler(void)
{

//KEY_OK
if(EXTI_GetITStatus(EXTI_Line14)==SET)
{
IO_OutputData(0x00);
delay_us(10);
EXTI_ClearITPendingBit(EXTI_Line14);
}

//KEY_UP
if(EXTI_GetITStatus(EXTI_Line15)==SET)
{
IO_OutputData(0xff);
delay_us(10);
EXTI_ClearITPendingBit(EXTI_Line15);
}
//KEY_DOWN
if(EXTI_GetITStatus(EXTI_Line12)==SET)
{

IO_OutputData(0xff);
delay_us(10);
EXTI_ClearITPendingBit(EXTI_Line12);
}

//KEY_CANCEL
if(EXTI_GetITStatus(EXTI_Line13)==SET)
{
IO_OutputData(0x00);
delay_us(10);
EXTI_ClearITPendingBit(EXTI_Line13);
}
}

----------------------------------------------------------------------
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

--------------------------------------------------------------------------------------
void KEY_config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = KEY_OK | KEY_UP;
GPIO_Init(GPIOE, &GPIO_InitStructure);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = KEY_DOWN | KEY_CANCEL;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource14);
EXTI_InitStructure.EXTI_Line = EXTI_Line14 ;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource15);
EXTI_InitStructure.EXTI_Line = EXTI_Line15 ;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource12);
EXTI_InitStructure.EXTI_Line = EXTI_Line12 ;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource13);
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

EXTI_ClearITPendingBit(EXTI_Line12);
EXTI_ClearITPendingBit(EXTI_Line13);
EXTI_ClearITPendingBit(EXTI_Line14);
EXTI_ClearITPendingBit(EXTI_Line15);

}

赞收藏评论7 发布时间：2014-11-25 10:48

7个回答

巅峰残狼回答时间：2014-11-25 11:33:03

在EXTI_ClearITPendingBit(EXTI_Line12);之前加一句EXTI_ClearFlag(EXTI_Line12);试试

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eason1931 回答时间：2014-11-25 13:05:47

巅峰残狼发表于 2014-11-25 11:33
在EXTI_ClearITPendingBit(EXTI_Line12);之前加一句EXTI_ClearFlag(EXTI_Line12);试试

试了，没能解决问题，这两个函数是一样的吧

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bbstr 回答时间：2014-11-26 08:04:01

如果12，13可以进入一次的话，可能配置没啥问题，将你的IO_OutputData贴出来看看，是不是在里面修改了12，13管脚的属性了

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eason1931 回答时间：2014-11-26 08:47:37

bbstr 发表于 2014-11-26 08:04
如果12，13可以进入一次的话，可能配置没啥问题，将你的IO_OutputData贴出来看看，是不是在里面修改了12，1 ...

void IO_OutputData(u8 DATA)
{
u8 IO_E,IO_B_L,IO_B_H;
IO_E = ((DATA&0x01)<<1)|((DATA&0x02)>>1);
IO_B_H = ((DATA&0x04)>>1)|((DATA&0x08)>>3);
IO_B_L = ((DATA&0x10)<<2)|((DATA&0x40)>>2)|(DATA&0x20)|((DATA&0x80)>>4);
GPIOE->BSRR = (IO_E & 0xff) | (~IO_E & 0xff)<<16;
GPIOB->BSRR = (IO_B_L & 0xff) | (IO_B_H & 0xff)<<8 | (~IO_B_L & 0xff)<<16 | (~IO_B_H & 0xff)<<24;
}

求大神指点

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无-387726 回答时间：2014-11-26 09:33:09

是不是不能在中断中有延时？为什么在中断中延时delay_us(10)？

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eason1931 回答时间：2014-11-26 09:41:46

bbstr 发表于 2014-11-26 08:04
如果12，13可以进入一次的话，可能配置没啥问题，将你的IO_OutputData贴出来看看，是不是在里面修改了12，1 ...

已解决，果然是 IO_OutputData的问题
void IO_OutputData(u8 DATA)
{
u8 IO_E,IO_B_L,IO_B_H;
IO_E = ((DATA&0x01)<<1)|((DATA&0x02)>>1);
IO_B_H = ((DATA&0x04)>>1)|((DATA&0x08)>>3);
IO_B_L = ((DATA&0x10)<<2)|((DATA&0x40)>>2)|(DATA&0x20)|((DATA&0x80)>>4);
GPIOE->BSRR = (IO_E & 0xff) | (~IO_E & 0xff)<<16;
GPIOB->BSRR = (IO_B_L & 0xff) | (~IO_B_L & 0xff)<<16 | (IO_B_H & 0x03)<<8 | (~IO_B_H & 0x03)<<24;

}

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bbstr 回答时间：2015-2-17 16:29:26

eason1931 发表于 2014-11-26 09:41
已解决，果然是 IO_OutputData的问题
void IO_OutputData(u8 DATA)
{

兄弟，如果解决了问题，把我的回复设为最佳答案啊，这样咱俩都有金币得了

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外部中断只能响应一次，求大神指点！

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