在线时间2 小时
UID3661538
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- 2020-12-7
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跪求大神帮忙看看,是不是配置的代码错误了。仿真时外部给低电平不进中断服务函数。
以下是我写的代码
void EXTIX_Init(void)
{
EXTI_InitTypeDef EXTI_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;
GPIO_InitTypeDef GPIO_InitStructure;
// OC_Init(); //¹âñî³õʼ»¯
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//ʹÄÜSYSCFGʱÖÓ
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_Init(GPIOA, &GPIO_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);//PA0 Á¬½Óµ½ÖжÏÏß0
EXTI_InitStruct.EXTI_Line = EXTI_Line0;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;//ÖжÏʼþ
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling; //ÉÏÉýÑØ´¥·¢
EXTI_InitStruct.EXTI_LineCmd = ENABLE;//ÖжÏÏßʹÄÜ
EXTI_Init(&EXTI_InitStruct);
NVIC_InitStruct.NVIC_IRQChannel = EXTI0_1_IRQn;//ÍⲿÖжÏ0
NVIC_InitStruct.NVIC_IRQChannelPriority = 0x04;//ÇÀÕ¼ÓÅÏȼ¶2
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
EXTI_ClearITPendingBit(EXTI_Line0);
}
void EXTI0_1_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0)!= RESET )
{
EXTI_ClearITPendingBit(EXTI_Line0);
}
// if((EXTI->R & EXTI_Line0) !=(uint32_t)RESET)
// {
// EXTI_ClearITPendingBit(EXTI_Line0);
//
// }
}
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