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stm32f407igt6 PH10配置成了外部中断不能进入中断,可以普通io输入输出正常,还有TIM5 ETR也不能使用,请问有懂得吗?
void EXTIX_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOH, ENABLE);//使能GPIO时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//使能SYSCFG时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //KEY0 KEY1 KEY2对应引脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOH, &GPIO_InitStructure);//初始化GPIOE2,3,4
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOH, EXTI_PinSource10);//PE2 连接到中断线2
EXTI_ClearITPendingBit(EXTI_Line10);
/* 配置EXTI_Line10 */
EXTI_InitStructure.EXTI_Line = EXTI_Line10;//LINE0
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //上升沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;//使能LINE0
EXTI_Init(&EXTI_InitStructure);//配置
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;//外部中断4
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;//抢占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;//子优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
NVIC_Init(&NVIC_InitStructure);//配置
}
//外部中断10服务程序
void EXTI15_10_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line10) != RESET )
{
printf("外部中断10\r\n");
}
EXTI_ClearITPendingBit(EXTI_Line10);//清除中断标志位
} |
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