大学生
最后登录1970-1-1
在线时间 小时
注册时间2014-10-7
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#include "stm32f10x.h"
uint8_t flag=0;
void EXTI_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
GPIO_Init(GPIOA,&GPIO_InitStructure);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
NVIC_InitStructure.NVIC_IRQChannel=EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_Init(&NVIC_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line=EXTI_Line0;
EXTI_InitStructure.EXTI_LineCmd=ENABLE;
EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure);
}
int main(void)
{
EXTI_Config();
while(flag)
{
flag=0;
GPIOB->ODR^=1ul;
}
}
void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0)==SET)
{
flag=1;
// GPIOB->ODR^=1ul;
EXTI_ClearITPendingBit(EXTI_Line0);
}
}
如果直接在中断函数里面翻转LED就能行的.
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