STM32F103芯片,做按键功能,不一样的端口(PORTA,PORTC),引脚都是pin8,我软件配置了,
却发现只能进一个中断,不知道为啥,电路都是一样的,估计是软件没有区分出来,不知道该怎么办,能否指导一下?,谢谢代码 如下
void Button_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource8);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource8);
EXTI_InitTypeDef EXTI_InitStructure;
EXTI_InitStructure.EXTI_Line =EXTI_Line8;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line8) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line8);
}
if(EXTI_GetITStatus(EXTI_Line8) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line8);
}
} |
进中断之后再判断一次IO的状态,其实没必要用中断