不能得到PIC32 MZ来接收和发送数据

我已经包含了用于我的PIC32 MZ的CAN总线代码，运行在100MHz，同样适用于外围总线。我使用的是来自微芯片的CAN总线分析仪来测试它。但是我不能得到PIC32 MZ来接收或发送数据。硬件似乎工作良好，因为其他人以前使用过它。如果有人用这个代码指出这个问题，那就太棒了。谢谢，Omkar J.。



      以下为原文

     
I have included the CAN bus code Im using for my PIC32mz, running at 100MHz, same for peripheral bus. I am using the CAN BUS analyzer from microchip trying to test it. But I cant get the the PIC32mz to either receive or transmit data. The hardware seems to be working fine as someone else has used it before. If someone could point out the issue with the code that would be awesome.

Thanks,
Omkar J.




void can2_init()
{
    //CAN2_RX
    TRISEbits.TRISE9 = 1;
    ANSELEbits.ANSE9 = 0;
    C2RXR = 0b1100;
    //CAN2_TX
    TRISEbits.TRISE8 = 0;
    ANSELEbits.ANSE8 = 0;
    RPE8R = 0b1111;
   
    CAN_BIT_CONFIG canBitConfig;
   
    CANEnableModule(CAN2, TRUE); //C2CONbits.ON = 1;
   
    CANSetOperatingMode(CAN2, CAN_CONFIGURATION); // C2CONbits.REQOP = 0b100;
    while (CANGetOperatingMode(CAN2) != CAN_CONFIGURATION); //while(C2CONbits.OPMOD != 0b100);
   
    canBitConfig.phaseSeg1Tq = CAN_BIT_3TQ;
    canBitConfig.phaseSeg2TimeSelect = TRUE;
    canBitConfig.phaseSeg2Tq = CAN_BIT_3TQ;
    canBitConfig.propagationSegTq = CAN_BIT_1TQ;
    canBitConfig.sample3Time = TRUE;
    canBitConfig.syncJumpWidth = CAN_BIT_1TQ;

    CANSetSpeed(CAN2, &canBitConfig, 100000000L , 125000L);

    CANAssignMemoryBuffer(CAN2, CanFifoMessageBuffers, 2 * 2 * CAN_TX_RX_MESSAGE_SIZE_BYTES);

    //CANEnableFeature(CAN2, CAN_STOP_IN_IDLE | CAN_RX_TIMESTAMP | CAN_WAKEUP_BUS_FILTER, FALSE);

    CANConfigureChannelForTx(CAN2, CAN_CHANNEL1, 2, CAN_TX_RTR_DISABLED, CAN_HIGHEST_PRIORITY); //Channel_1 is TX buffer
   
    CANConfigureChannelForRx(CAN2, CAN_CHANNEL0, 2, CAN_RX_FULL_RECEIVE); //Channel_0 is RX buffer

    CANConfigureFilter(CAN2, CAN_FILTER0, 0, CAN_SID);

    CANConfigureFilterMask (CAN2, CAN_FILTER_MASK0, 0x0, CAN_EID, CAN_FILTER_MASK_IDE_TYPE); //accept all messages

    CANLinkFilterToChannel(CAN2, CAN_FILTER0, CAN_FILTER_MASK0, CAN_CHANNEL0);

    CANEnableFilter (CAN2, CAN_FILTER0, TRUE);
   
    CANEnableChannelEvent (CAN2, CAN_CHANNEL0, (CAN_RX_CHANNEL_NOT_EMPTY|CAN_RX_CHANNEL_FULL), TRUE);
    CANEnableModuleEvent (CAN2, CAN_RX_EVENT, TRUE);
   
    // set interrupts
    C2INTbits.RBIF = 0; // clear level 2 interrupt flag
    C2INTbits.RBIE = 1; // enable level 2 interrupt

    IFS4bits.CAN2IF = 0; // clear level 1 interrupt flag
    IEC4bits.CAN2IE = 1; // enable level 1 interrupt
   
    IPC38bits.CAN2IP = 0b111; // priority 7
    IPC38bits.CAN2IS = 0b00; // sub-priority 0

    C2FIFOINT0bits.RXNEMPTYIF = 0; // clear level 3 interrupt flag
    C2FIFOINT0bits.RXNEMPTYIE = 1; // enable level 3 interrupt

    CANSetOperatingMode(CAN2, CAN_NORMAL_OPERATION);
    while (CANGetOperatingMode(CAN2) != CAN_NORMAL_OPERATION);
   
    serial_transmit("CAN Setup Donern");
}void send_can2()
{
    CANTxMessageBuffer* buffer;

    buffer = CANGetTxMessageBuffer(CAN2, CAN_CHANNEL1); ;
   
    if (buffer != NULL) // NULL indicates Channel Full
    {
        /* Clear the message buffer. */
        buffer->messageWord[0] = 0;
        buffer->messageWord[1] = 0;
        buffer->messageWord[2] = 0;
        buffer->messageWord[3] = 0;

        buffer->msgSID.SID = 0x100;/* Message SID */
        message->msgEID.IDE = 0;
        buffer->msgEID.DLC = 7;/* Data Length is 2 */
        message->msgEID.DLC = 2;
        message->msgEID.RTR = 0;
        message->msgEID.SRR = 0;
        message->data[0] = 0x13;
        message->data[1] = 0x00;
        message->data[2] = 0x15;
        message->data[3] = 0x01;
        message->data[4] = 0x01;
        message->data[5] = 0xF4;
        message->data[6] = 0x01;
        
        CANUpdateChannel(CAN2,CAN_CHANNEL1);
        CANFlushTxChannel(CAN2,CAN_CHANNEL1);
    }
      
}void __attribute__((vector(_CAN2_VECTOR), interrupt(IPL7AUTO))) CAN2InterruptHandler(void)
{
        serial_transmit("CAN_ISR");
        if((CANGetModuleEvent(CAN2) & CAN_RX_EVENT) != 0)
{

      if((CANGetPendingEventCode(CAN2) == CAN_CHANNEL0_EVENT)/* && (CANGetPendingEventCode(CAN1) ==                 CAN_CHANNEL2_EVENT)*/)
            {
                     CANEnableChannelEvent(CAN2, CAN_CHANNEL0, CAN_RX_CHANNEL_NOT_EMPTY, FALSE);
             }

}
    IFS4bits.CAN2IF = 0; // clear level 1 interrupt flag
}