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mian.c代码如下:
#include "stm32f10x.h"
#include <stdio.h>
void GPIO_Configuration(void);
void EXTI_Configuration(void);
void Delay(__IO uint32_t nCount);
void NVIC_Configuration(void);
int main(void)
{
SystemInit(); /*此函数在Libraries\CMSIS\Core\CM3\system_stm32f10x.c中*/
NVIC_Configuration();
GPIO_Configuration();
EXTI_Configuration();
GPIO_ResetBits(GPIOF, GPIO_Pin_6|GPIO_Pin_7);
while (1);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //指定中断源
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 7;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIOG | RCC_APB2Periph_GPIOF ,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOG, &GPIO_InitStructure); /* PG8 */
GPIO_SetBits(GPIOF, GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOF, &GPIO_InitStructure);
}
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_ClearITPendingBit(EXTI_Line8);
EXTI_InitStructure.EXTI_Line=EXTI_Line8;
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_PortSourceGPIOG, GPIO_PinSource8);
}
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
中断函数中添加函数如下:
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line8)!= RESET)
{
GPIO_ResetBits(GPIOF,GPIO_Pin_8);
EXTI_ClearFlag(EXTI_Line8);
EXTI_ClearITPendingBit(EXTI_Line8);
}
}
是用板上的USER键(GPIOG,Pin8)控制中断的,但没反应,不知道什么问题 |
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