CAN中断无法进入，请大神指点。。。在线等

Flymer · 发表于 2016-1-13 13:36:57

本帖最后由 Flymer 于 2016-1-13 15:42 编辑

我用的是STM32F103C8T6的MCU和SN65HVD230的CAN芯片，只用了一块电路板；中断都配置了，但是无法进去；清=请大神指点
程序GPIO口的配置
static void CAN_GPIO_Config(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

      GPIO_PinRemapConfig(GPIO_Remap1_CAN1, ENABLE);

      /* Configure CAN pin: RX PB8*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

      /* Configure CAN pin: TX PB9 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}

CAN的模式配置：
static void CAN_Mode_Config(void)
{
         CAN_InitTypeDef       CAN_InitStructure;
      CAN_DeInit(CAN1);
      CAN_StructInit(&CAN_InitStructure);

      CAN_InitStructure.CAN_TTCM=DISABLE;
CAN_InitStructure.CAN_ABOM=DISABLE;
CAN_InitStructure.CAN_AWUM=DISABLE;
CAN_InitStructure.CAN_NART=DISABLE;
CAN_InitStructure.CAN_RFLM=DISABLE;
CAN_InitStructure.CAN_TXFP=DISABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1=CAN_BS1_5tq;
CAN_InitStructure.CAN_BS2=CAN_BS2_3tq;
CAN_InitStructure.CAN_Prescaler =4;
CAN_Init(CAN1, &CAN_InitStructure);
}

CAN过滤器配置
static void CAN_Filter_Config(void)
{
      CAN_FilterInitTypeDef  CAN_FilterInitStructure;
      CAN_FilterInitStructure.CAN_FilterNumber=0;
      CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdList;
      CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
      CAN_FilterInitStructure.CAN_FilterIdHigh= (((u32)0x0001<<3)&0xFFFF0000)>>16;       //扩展ID，地址为0X0001;
      CAN_FilterInitStructure.CAN_FilterIdLow= (((u32)0x0001<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF;
      CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0xFFFF;
      CAN_FilterInitStructure.CAN_FilterMaskIdLow= 0xFFFF;
      CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0 ;
      CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
      CAN_FilterInit(&CAN_FilterInitStructure);

      CAN_ITConfig(CAN1,CAN_IT_FMP0, ENABLE);  //CAN通讯中断使能
}

CAN通信报文设置
void CAN_SetMsg(void)
{
   TxMessage.StdId=0x00;
   TxMessage.ExtId=0x0001;
   TxMessage.IDE=CAN_ID_EXT;
   TxMessage.RTR=CAN_RTR_DATA;
   TxMessage.DLC=2;
      TxMessage.Data[0]=0x12;
      TxMessage.Data[1]=0x11;

}

void CAN_Config(void)
{
  CAN_GPIO_Config();
  CAN_Mode_Config();
  CAN_Filter_Config();
}

main程序
CanTxMsg TxMessage;
CanRxMsg RxMessage;

void RCC_Configuration(void)  //时钟配置
{
      SystemInit();
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA
                        |RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC
                        |RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE
                                                            |RCC_APB2Periph_ADC1  | RCC_APB2Periph_AFIO
                        |RCC_APB2Periph_SPI1 | RCC_APB2Periph_AFIO, ENABLE );

   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4
                        |RCC_APB1Periph_USART3|RCC_APB1Periph_TIM2
                        | RCC_APB1Periph_CAN1, ENABLE );
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

}
//中断控制使能
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

int main(void)
{
RCC_Configuration();    NVIC_Configuration()；
CAN_Config();
CAN_SetMsg();
CAN_Transmit(CAN1, &TxMessage);

      while (1)
      {
      }
}

中断服务函数
void USB_LP_CAN1_RX0_IRQnHandler(void)
{
         CanRxMsg RxMessage;
         RxMessage.StdId=0x00;
         RxMessage.ExtId=0x00;
      RxMessage.IDE=0;
      RxMessage.DLC=0;
      RxMessage.FMI=0;
      RxMessage.Data[0]=0x00;
      RxMessage.Data[1]=0x00;
   CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);

         if((RxMessage.ExtId==0x0001)  &&
         (RxMessage.IDE==CAN_ID_EXT)&&
         (RxMessage.DLC ==2 ))
      {
         flag = 0;
      }
      else
      {
         flag = 0xff;
      }

}