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问题具体情况为：在gpio_init初始化函数中，初始化两个外部中断，分别在PC1、PC2口上，但是在第一个NVIC_Init(&NVIC_InitStructure)处
就执行不下去了，如果屏蔽第一个NVIC_Init(&NVIC_InitStructure); 程序可以继续执行。
代码如下：void Gpio_Init()
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA
|RCC_APB2Periph_GPIOB
|RCC_APB2Periph_GPIOC
|RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_7);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_1);
EXTI_ClearITPendingBit(EXTI_Line1);
EXTI_InitStructure.EXTI_Line = EXTI_Line1;
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_PortSourceGPIOC, GPIO_PinSource1);
EXTI_GenerateSWInterrupt(EXTI_Line1);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); //在此处跑飞，如果屏蔽这一句，就可以正常运行下去
/*********************ÅäÖÃ C2￡¬ía2¿ÖD¶Ï′￥·￠LD3320*********************************/
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC,&GPIO_InitStructure);
EXTI_ClearITPendingBit(EXTI_Line2);
EXTI_InitStructure.EXTI_Line = EXTI_Line2;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource2);
EXTI_GenerateSWInterrupt(EXTI_Line2);
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
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最佳答案
查看完整内容[请看2#楼]
多谢老铁，问题解决了，但是感觉也是莫名其妙的就好了，可能是因为几条主要的命令顺序问题， EXTI_GenerateSWInterrupt(EXTI_Line1); EXTI_ClearFlag(EXTI_Line1); GPIO_SetBits(GPIOC,GPIO_Pin_1); 就是这三条命令，具体原因还是不清楚，再次感谢
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( 粤ICP备12000418号-1 )
发表于 2017-7-17 15:50:16
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