MPC5748G Receive CAN messages

[joãopaulo]

Hello,

I'd like to know how to discover what received message called the interrupt handler. 

For example:

FLEXCAN_DRV_Init(INST_CAN0_GPSCAN, &can0_GPSCAN_State, &can0_GPSCAN_InitConfig0);

FLEXCAN_DRV_InstallEventCallback(INST_CAN0_GPSCAN, can1_GPSCAN_Interrupt, NULL);

const flexcan_data_info_t dataInfo_GPSCAN =
{
.data_length = 0x8, /* 1 byte in length */
.msg_id_type = FLEXCAN_MSG_ID_STD, /* Standard message EXT */
.enable_brs = false, /* Bit rate switch disabled */
.fd_enable = false, /* Flexible data rate disabled */
.fd_padding = 0U /* Use zeros for FD padding */
};

FLEXCAN_DRV_ConfigRxMb(INST_CAN0_GPSCAN, accel_MB, &accel_Buff, accel_MSG_ID);

FLEXCAN_DRV_ConfigRxMb(INST_CAN0_GPSCAN, magn_MB, &magn_Buff, magn_MSG_ID);

FLEXCAN_DRV_Receive(INST_CAN0_GPSCAN, accel_MB, &accel_Buff);
FLEXCAN_DRV_Receive(INST_CAN0_GPSCAN, magn_MB, &magn_Buff);

void can1_GPSCAN_Interrupt(uint32_t buffIdx, flexcan_event_type_t eventType)
{
   if (eventType == FLEXCAN_EVENT_RX_COMPLETE)
   {
        HOW DO I KNOW WHAT RECEIVED MESSAGE CALLED THE INTERRUPT ROUTINE???
    }
}

Thanks in advance!

Regards

João

[PetrS · Accepted solution]

Hi,

a driver gives you MB number in callback directly, use below callback function

void can1_GPSCAN_Interrupt(uint8_t instance, flexcan_event_type_t eventType, uint32_t buffIdx,
flexcan_state_t *flexcanState)
{
   (void)flexcanState;
   (void)instance;

   switch(eventType)
   {
   case FLEXCAN_EVENT_RX_COMPLETE:
         {
              
         }
         break;
   case FLEXCAN_EVENT_RXFIFO_COMPLETE:
         {   

         }
         break;
   case FLEXCAN_EVENT_TX_COMPLETE:

         {   

         }

         break;
   default:
   break;
   }
}

BR, Petr