帮忙看看程序错在哪！！

只看该作者 · 2008-5-20 22:57

我用的是S51+SJA1000+TJA1050做的两个一样的板子通信一个发送一个接收
现在出现的问题是接收端老是提示数据溢出。下面是我的发送接收程序，懂行的帮我看看，提出意见，谢谢、！！

void init_can()
{
    WriteSjaReg(REG_CONTROL,0x01);
    WriteSjaReg(REG_ACR,0x00);
    WriteSjaReg(REG_AMR,0xFF);
    WriteSjaReg(REG_BTR0,0x03);
    WriteSjaReg(REG_BTR1,0x1C);
    WriteSjaReg(REG_CDR,0x48);
    WriteSjaReg(REG_OCR,0xaa);
    WriteSjaReg(REG_CONTROL,0x1E);
}

void  SendData(void)
{
    SendBuf[0] = 0x11;
    SendBuf[1] = 0x28;
    if((ReadSjaReg(REG_CONTROL)&0x01)==0) //JA1000处于工作模式
    {
        if((ReadSjaReg(REG_CONTROL)&0x08)==0x08)
        {
          if((ReadSjaReg(REG_CONTROL)&0x04)==0x04)
          {
            *((unsigned    char xdata *)REG_TxBuffer1) = 0x55;
            *((unsigned    char xdata *)REG_TxBuffer2) = 0;
            *((unsigned    char xdata *)REG_TxBuffer3) =0;
            *((unsigned    char xdata *)REG_TxBuffer4) = 0;
            *((unsigned    char xdata *)REG_TxBuffer5) = 0;
            *((unsigned    char xdata *)REG_TxBuffer6) = 0;            *((unsigned    char xdata *)REG_TxBuffer7) = SendBuf[6];
            *((unsigned    char xdata *)REG_TxBuffer8) = 0;
            *((unsigned    char xdata *)REG_TxBuffer9) = 0;            *((unsigned    char xdata *)REG_TxBuffer10) = 0;

            BCAN_CMD_PRG(TR_CMD); //置位发送请求位
            P2_1=0;
          }
        }
    }
    else //SJA1000在复位模式
    {
        printf("SJA1000 is working as Reset Mode! ");
        init_can();
    }
}

接收程序：
void   ReceiveData(void)
{
   unsigned char DataLong;
   if(ReadSjaReg(REG_STATUS) & 0x01 == 0x01)
   {
            RcvBuf[0] = *((unsigned char xdata *)REG_RxBuffer1);
       RcvBuf[1] = *((unsigned char xdata *)REG_RxBuffer2);
       RcvBuf[2] = *((unsigned char xdata *)REG_RxBuffer3);
       RcvBuf[3] = *((unsigned char xdata *)REG_RxBuffer4);
       RcvBuf[4] = *((unsigned char xdata *)REG_RxBuffer5);
       RcvBuf[5] = *((unsigned char xdata *)REG_RxBuffer6);
       RcvBuf[6] = *((unsigned char xdata *)REG_RxBuffer7);
       RcvBuf[7] = *((unsigned char xdata *)REG_RxBuffer8);
       RcvBuf[8] = *((unsigned char xdata *)REG_RxBuffer9);
       RcvBuf[9] = *((unsigned char xdata *)REG_RxBuffer10);

       //P2_1=0;

       if(ReadSjaReg(REG_STATUS) & 0x03 == 0x03)
       {
            WriteSjaReg(REG_COMMAND,0x0c); //释放缓冲区并清除溢出标志
            P2_2 = 0; （问题就在这里，这个LED亮，数据溢出！）
       }
       else
       {
            WriteSjaReg(REG_COMMAND,0x04);; //释放缓冲区
            P2_3 = 0;
       }
       }
     }
}

只看该作者 · 2008-5-23 10:48

帮忙看看程序错在哪！！

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