IMXRT1062 Flexcan-FD FIFO Example

[michaelsmorto]

Been looking in the SDKs for an example using FIFO for RX and TX but do not see any in the CAN or CANFD driver examples.  Can you all provide a sample program using FIFO?

EDIT:  One of the things that this would be helpful with is setting up the id filter table and the appropriate structure.  I really would like to be able to receive on any mailbox a series of message ides as well as setting up a CANFD fifo

EDIT2:  BTW the docs for the FD example in the 1060evk sdk state

Board settings
==============
The example requires 2 sets of boards, each of them are mounted with the base board. Using a male to male CAN
cable to connect the CAN2 instance (J11) between the 2 base boards.

In looking at the schematic and the pins it looks like the CAN3 tx/rx pins go to the Arduino header.  So how can you test CANFD if you don't have a receiver?  CAN2 is not CANFD.

[michaelsmorto]

Hi Jorge Antonio Alcala Vazquez

I really appreciate your reply. Thank you for the links - they really help in understanding how to set up the FIFO which was what I was looking.  

Now for the fun - start implementation of the FIFO in the application.

[jorge_a_vazquez · Accepted solution]

Hi Michael Smorto

Unfortunately, there isn't any example code of flexcan using the RXFIFO buffer provided along with the SDK. You can check the following post:

K10 FlexCan RX FIFO Filter 

FlexCAN Fifo SDK 2.0 example 

Even if they are for different chips, you could use them as reference for your implementation. I have implement a simple example using the FIFO:

flexcan_rx_fifo_config_t fifoConfig;
     uint32_t tableID[10] = { FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[0], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[1], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[2], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[3], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[4], 0, 0),
              FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[5], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[6], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[7], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[8], 0, 0),
            FLEXCAN_RX_FIFO_STD_MASK_TYPE_A(rxIdentifier[9], 0, 0), };


     fifoConfig.idFilterType = kFLEXCAN_RxFifoFilterTypeA;
  fifoConfig.idFilterNum = sizeof(tableID) / sizeof(tableID[0]);//2;
  fifoConfig.idFilterTable = tableID;
  fifoConfig.priority = kFLEXCAN_RxFifoPrioHigh;

     FLEXCAN_SetRxFifoConfig(EXAMPLE_CAN, &fifoConfig, true);

......

......

/* When you want to receive some data */

rxXferfifo.frame = &frame;

   FLEXCAN_TransferReceiveFifoNonBlocking(EXAMPLE_CAN, &flexcanHandle, &rxXferfifo);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

EDIT2:  BTW the docs for the FD example in the 1060evk sdk state

Thanks for pointing out the mistake, this is a error in the read me file, it should actually say CAN3, those pins have also the functionality of the CAN3_Tx/Rx.

Hope this could helps you
Have a great day,
TIC

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