STM32外部中断进不去

只看该作者 · 2015-1-23 14:47

stm32外部中断，配置完全看不出有什么问题，可是中断就是触发不了，用EXTI_GenerateSWInterrupt(EXTI_Line0);软件触发也不行，求大家帮看看，以下是配置程序：
//时钟配置
void RCC_Configuration(void)
{
  ErrorStatus HSEStartUpStatus;
  RCC_DeInit();
  RCC_HSEConfig(RCC_HSE_ON);
  HSEStartUpStatus = RCC_WaitForHSEStartUp();
  if(HSEStartUpStatus == SUCCESS)
  {
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
FLASH_SetLatency(FLASH_Latency_2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08)
{
}
  }
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_I2C1 | RCC_APB1Periph_CAN1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB  | RCC_APB2Periph_AFIO, ENABLE);
}
//IO口配置
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void EXTI_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);

EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

}

int main()
{
RCC_Configuration();
GPIO_Configuration();
EXTI_Config();
      EXTI_GenerateSWInterrupt(EXTI_Line0);
while(1)
{
LEDRED_onoff(ON);
Delay_ms(500);
LEDRED_onoff(OFF);
Delay_ms(500);
}
}

void EXTI0_IRQHandler(void)
{
   if(EXTI_GetITStatus(EXTI_Line9)!= RESET)
{
               EXTI_ClearITPendingBit(EXTI_Line4);
               LEDGREEN_onoff(ON);
      }
}

只看该作者 · 2015-1-23 16:11

NVIC没有配置
类似如下:

/* 使能中断线并配置中断优先级 */
NVIC_InitStructure.NVIC_IRQChannel = NRF24L01_IRQ_EXTI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);