独立按键实验（用外部中断控制的）

赵赶驴

#include<stm32f10x.h>

void GPIO_Configuration(void);

void RCC_Configuration(void);

void NVIC_Configuration(void);

static LED_Delay(uint32_t nCount);

void EXTI_Configuration(void);

int main(void)

{

RCC_Configuration();

GPIO_Configuration();

NVIC_Configuration();

    EXTI_Configuration();

while(1)

{

;

}

}

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;

GPIO_Init(GPIOE,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;

GPIO_Init(GPIOC,&GPIO_InitStructure);

}

void RCC_Configuration(void)

{

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

}

void EXTI_Configuration(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource6);

EXTI_InitStructure.EXTI_Line = EXTI_Line6;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; 

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_LineCmd = ENABLE; 

EXTI_Init(&EXTI_InitStructure);  

}

 void NVIC_Configuration(void)

 {

  NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel=EXTI9_5_IRQn; //irqn

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

 

 }

 void EXTI9_5_IRQHandler(void)

 {

  if(EXTI_GetITStatus(EXTI_Line6)==SET)

{

GPIO_WriteBit(GPIOE,GPIO_Pin_2,(BitAction)(1-GPIO_ReadOutputDataBit(GPIOE,GPIO_Pin_2)));

}

 }

按键按下后不灭，但是稍微变暗，为什么啊？前面的配置估计没啥为题，可能是中断处理函数有问题。另外当写EXTI_ClearITpendingBit(EXTI_Line6);时会出现这种错误：.axf: Error: L6218E: Undefined symbol EXTI_ClearITpendingBit (referred from main.o).

正点原子

回复【楼主位】赵赶驴:
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参考下我们战舰板的例子吧.