Hardware requirements

  • USB-C cable

  • FRDM-MCXE247 board

  • Personal Computer

Board settings

The example requires 2 boards.

Board to board connections needed to be as follows:

        Node A           connect to      Node B
Pin Name   Board Location         Pin Name    Board Location
CANH       J17-1                  CANH        J17-1
CANL       J17-2                  CANL        J17-2
GND        J17-4                  GND         J17-4

Prepare the Demo

  1. Connect a USB cable between the PC host and the OpenSDA USB on the board.

  2. Open a serial terminal on PC for OpenSDA serial device with these settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board.

  4. Either press the reset button on your board or launch the debugger in your IDE to begin running the example.

Running the demo

After connecting the two boards, these instructions display on each terminal window. One board must be chosen as node A and the other board as node B. (Note: Node B should start first) Data is sent continuously between the node A and the node B.

This message displays on the node A terminal:

********* FLEXCAN Interrupt EXAMPLE *********
    Message format: Standard (11 bit id)
    Message buffer 1 used for Rx.
    Message buffer 0 used for Tx.
    Interrupt Mode: Enabled
    Operation Mode: TX and RX --> Normal
*********************************************

Please select local node as A or B:
Note: Node B should start first.
Node:A
Press any key to trigger one-shot transmission

Rx MB ID: 0x123, Rx MB data: 0x0, Time stamp: 24291
Press any key to trigger the next transmission!

Rx MB ID: 0x123, Rx MB data: 0x1, Time stamp: 59183
Press any key to trigger the next transmission!

This message displays on the node B terminal:

********* FLEXCAN Interrupt EXAMPLE ********* Message format: Standard (11 bit id) Message buffer 1 used for Rx. Message buffer 0 used for Tx. Interrupt Mode: Enabled Operation Mode: TX and RX –> Normal

Please select local node as A or B: Note: Node B should start first. Node:B Start to Wait data from Node A

Rx MB ID: 0x321, Rx MB data: 0x0, Time stamp: 16425 Wait Node A to trigger the next transmission!

Rx MB ID: 0x321, Rx MB data: 0x1, Time stamp: 51370 Wait Node A to trigger the next transmission!