stm32f0 进入中断后不能调用函数但是设置标志位却可以，求解

电纸人 · 发表于 2014-11-7 23:21:19

用stm32f0 的PB2引脚作为外部中断源输入引脚，设置为下拉模式配置中断时设置为上升沿中断，但是不能进入中断，设置下降沿可以进入中断但是中断在中断函数里面调用函数缺没有执行，在中断函数里置标志位却可以不知道怎么回事！

void Paper_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

GPIO_InitStruct.GPIO_Pin = PAPER; //PB2
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStruct.GPIO_Speed =GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct);
}

void Exti_Init(void)
{
EXTI_InitTypeDef EXTI_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;

Paper_Init();

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

NVIC_InitStruct.NVIC_IRQChannel = EXTI2_3_IRQn; //EXTI Line 2 and 3 Interrupts
NVIC_InitStruct.NVIC_IRQChannelPriority = 1;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);

SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource2);
EXTI_InitStruct.EXTI_Line = EXTI_Line2;
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStruct.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStruct);
}

void EXTI2_3_IRQHandler(void)
{
if(EXTI->

R &(EXTI_Line2))
{

aper_Flag = 1;
EXTI->

R |= (1 << 2);
}
}