MCUXpresso SDK Documentation
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Hardware requirements

Hardware requirements#

  • Micro USB cable

  • two IMX95LP4X-EVK board

  • JLink Plus

  • 12V~20V power supply

  • Personal Computer

Board settings#

The example requires connecting between CAN pins of two boards. The connection should be set as follows:

Between two boards:

  • J22-2(CANH) node A, J22-2(CANH) node B

  • J22-3(CANL) node A, J22-3(CANL) node B

  • J22-4(GND) node A, J22-4(GND) node B

Prepare the Demo#

  1. Connect 12V~20V power supply and JLink Plus to the board, switch SW4 to power on the board

  2. Connect a micro USB cable between the host PC and the J31 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Either re-power up your board or launch the debugger in your IDE to begin running the demo.

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:

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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