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RT 此处要利用PD7做为外部中断入口,判断其电平。但是运行时发现PD15(初始化配置为I/O开关输出)也可以进入EXIT9_5中断,电路上PD7和PD15隔离的没有回路,并且PD15和PD7互不影响对方电平。不知该如何解决。
void EXTIX_Init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //使能复用功能时钟
//GPIOD.7 中断线以及中断初始化配置 下降沿触发
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD,GPIO_PinSource7);
EXTI_InitStructure.EXTI_Line=EXTI_Line7; //PD7
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //中断线5-9,共用中断函数
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级2,
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //子优先级1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
}
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line7)!=RESET)
{
EXTI_InitTypeDef EXTI_InitStructure;
delay_ms(10);//消抖
open_close++;
if(open_close==1)
{
USART1_Write_ButtonStatus(203,0xFF,0x00);delay_ms(5);
printf("开门\r\n");
EXTI_InitStructure.EXTI_Line=EXTI_Line7; //PD7
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
}
if(open_close==2)
{
USART1_Write_ButtonStatus(204,0xFF,0x00);delay_ms(5);
printf("关门\r\n");
EXTI_InitStructure.EXTI_Line=EXTI_Line7; //PD7
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器
open_close=0;
}
EXTI_ClearITPendingBit(EXTI_Line7); //清除LINE0上的中断标志位
}
} |
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