Hardware requirements

  • Type-C USB cable

  • FRDM-MCXA156 Board

  • Personal Computer

Board settings

The example requires 2 sets of boards, each of them is mounted with the base board. To make example work, connections needed to be as follows on each base board:

Board to board connections needed to be as follows:

        Node A           connect to      Node B
Pin Name   Board Location         Pin Name    Board Location
CANH       J22-2                  CANH        J22-2
CANL       J22-4                  CANL        J22-4
GND        J22-3                  GND         J22-3

Prepare the Demo

  1. Connect the type-C USB cable between the PC host and the USB ports on the board.

  2. Open a serial terminal on PC for the 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 PingPong Buffer Example *********
    Message format: Standard (11 bit id)
    Node B Message buffer 1 to 4 used as Rx queue 1.
    Node B Message buffer 5 to 8 used as Rx queue 2.
    Node A Message buffer 8 used as Tx.
*********************************************

Please select local node as A or B:
Note: Node B should start first.
Node:A
Please input the number of CAN/CANFD messages to be send and end with enter.
100
Transmission done.

Please input the number of CAN/CANFD messages to be send and end with enter.

This message displays on the node B terminal:

********* FLEXCAN PingPong Buffer Example ********* Message format: Standard (11 bit id) Node B Message buffer 1 to 4 used as Rx queue 1. Node B Message buffer 5 to 8 used as Rx queue 2. Node A Message buffer 8 used as Tx.

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

Read Rx MB from Queue 1. Rx MB ID: 0x321, Rx MB data: 0x0, Time stamp: 20971 Rx MB ID: 0x321, Rx MB data: 0x1, Time stamp: 56187 Rx MB ID: 0x321, Rx MB data: 0x2, Time stamp: 56867 Rx MB ID: 0x321, Rx MB data: 0x3, Time stamp: 57547 Read Rx MB from Queue 2. Rx MB ID: 0x321, Rx MB data: 0x4, Time stamp: 56187 Rx MB ID: 0x321, Rx MB data: 0x5, Time stamp: 56867 Rx MB ID: 0x321, Rx MB data: 0x6, Time stamp: 57547 Rx MB ID: 0x321, Rx MB data: 0x7, Time stamp: 57547 Wait Node A to trigger the next 8 messages!

Read Rx MB from Queue 1. Rx MB ID: 0x321, Rx MB data: 0x8, Time stamp: 61657 Rx MB ID: 0x321, Rx MB data: 0x9, Time stamp: 31304 Rx MB ID: 0x321, Rx MB data: 0xa, Time stamp: 31983 Rx MB ID: 0x321, Rx MB data: 0xb, Time stamp: 32662 Read Rx MB from Queue 2. Rx MB ID: 0x321, Rx MB data: 0xc, Time stamp: 31304 Rx MB ID: 0x321, Rx MB data: 0xd, Time stamp: 31983 Rx MB ID: 0x321, Rx MB data: 0xe, Time stamp: 32662 Rx MB ID: 0x321, Rx MB data: 0xf, Time stamp: 32662 Wait Node A to trigger the next 8 messages!

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