CAN通讯问题

只看该作者 · 2009-9-21 10:57

每次仿真调试时第一次运行CAN通讯均无法成功，在运行过程重新对CAN寄存器进行初始化也无法恢复（CAN初始化成功），需要复位一下程序再重新运行CAN才能正常通讯；在实际运行过程中也会出现有时无法通讯的情况，只有断电重启后才能够恢复正常。不知道问题出在什么地方？
采用CAN232MB协议转换器，硬件采用CTM1060T

只看该作者 · 2009-9-21 11:30

CAN初始化部分代码
void CAN_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  CAN_InitTypeDef       CAN_InitStructure;
  CAN_FilterInitTypeDef  CAN_FilterInitStructure;
  //CanTxMsg TxMessage;
  RCC_ClocksTypeDef RCC_ClocksStatus;
  //u32 i = 0;
  //u8 TransmitMailbox = 0;
  //bool Can_Send_AA_Flag = TRUE;

//Configure CAN pin: RX
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  //Configure CAN pin: TX
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

RCC_GetClocksFreq(&RCC_ClocksStatus);
CAN_DeInit(CAN1);
  CAN_StructInit(&CAN_InitStructure);
// CAN cell init
  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_13tq;
  CAN_InitStructure.CAN_BS2=CAN_BS2_2tq;
  CAN_InitStructure.CAN_Prescaler=RCC_ClocksStatus.PCLK1_Frequency/(16*250000);    //波特率计算，16M/（1+8+7）/4=250k
  if(!CAN_Init(CAN1, &CAN_InitStructure))
  {
    //CAN初始化失败
    Can_Structure.Init_Fail_Flag = true;
    return;
  }

  /* CAN filter init */
/* CAN_FilterInitStructure.CAN_FilterNumber=0;
  CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment=0;
  CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);*/

  //CAN filter init
  CAN_FilterInitStructure.CAN_FilterNumber=0;
  CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FIFO0;
  CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);
  CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
}

只看该作者 · 2009-9-21 15:46

问题是有点奇怪，重新初始化不行，复位就可以了，二者好像是一样的效果

只看该作者 · 2009-9-21 16:49

是啊，现在还是没整明白问题出在哪儿，另CTM1060T电源是可控的

只看该作者 · 2009-10-9 11:38

为什么我看到的程序设计中的过滤器的设置老是0 呢？有没有人给讲解一下如何设置过滤器啊？

只看该作者 · 2009-10-11 08:53

过滤器都配置为零，就说明不需要对ID进行过滤，所有ID都接收，如果需要过滤哪一位，就把哪一位置1

只看该作者 · 2009-10-12 22:16

会不会是程序里面有死循环