TMS570LC4357: Unable to check if a can-message was lost

Part Number: TMS570LC4357

Hello everybody,

i am searching for a possibility to check, if a can.message was lost during the communication. In order to test these case,

i send 4 messages with the same messageID and i only configure one Messagebox with the same messageID as the four tx-messageboxes.

i configured the messageboxes like:

-messagebox[1-4] are Tx-messageboxes with the same messageID 1

-messagebox[33-36] are Rx-messageboxes with respectively messageID 1 - 4

i observed the the MsgLst-bit in the IF2MCTL register to check, if any change happened. but nothing change. it remains all the time 0.

Does someone know, how i can find out a lost message.

Below my code

     char Data[8] = "Hello";
     char Data2[8] = "world!";
     uint8 MsgID = 1, a = 0;
     uint8 DataArray[4][8];
     

     uint32 i;
     canInit();
     canEnableloopback(canREG1, Internal_Lbk);
     memcpy(&DataArray[0][0], Data, 8);
     memcpy(&DataArray[1][0], Data2, 8);
     memcpy(&DataArray[2][0], Data, 8);
     memcpy(&DataArray[3][0], Data2, 8);

     for (i = 1; i<= 4; i++){
         canUpdateID(canREG1, i , 0x40000000U | 0x20000000U | (MsgID  & 0x1FFFFFFFU));
         ResultOfTransmission = canTransmit(canREG1, i, DataArray[i-1]);
         canUpdateID(canREG1, i + 32,  0x40000000U |  (i & 0x1FFFFFFFU));
     }

    while(1){
       static UINT32 j = 33;
       UINT8 i;
       uint32 ValueOfMsgLst = 0, ValueOfNewdata = 0;

       printf("**** Round nr %d*******\n", j);
       ValueOfMsgLst =  (uint32)(canREG1->IF2MCTL & (1 << 14));

       ValueOfNewdata =  (uint32)(canREG1->IF2MCTL & (1 << 15));
                    if (a < 4){
                        ResultOfTransmission = canGetData(canREG1, j , &data[a][0]);
                    }
                   a++;
    }