These numbers puzzles me. Shouldn’t RxCallback1 and RxCallback2 be less or equal to MCP2515_isr? Where does these extra 81 calls come from? I’m missing something here...

Also, RxCallback2 is much bigger than Rx pkt, which means not all frames are sent to IncomingFrame. I Believe the reason is this code in can.cpp CAN_rxtask:

        case CAN_rxcallback:

          while (msg.body.bus->RxCallback(&msg.body.frame))

            {

            me->IncomingFrame(&msg.body.frame);

            }

          break;

Is this correct? Wouldn’t it skip calling IncomingFrame it there are only one interrupt?

I would think this is would be more appropriate:

  

         case CAN_rxcallback:

         {

          bool keepOn=true;

          do

            {

            keepOn = msg.body.bus->RxCallback(&msg.body.frame);

            me->IncomingFrame(&msg.body.frame);

            }while(keepOn);

          }

          break;

Do you agree?

But, the interrupts still stops :-( What does the 0x2040 means? And where do that number comes from? 

Best regards,

Geir