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dsc_mscan_interrupt_transfer

dsc_mscan_interrupt_transfer#

Overview#

The mscan_interrupt example shows how to use MSCAN driver in none-blocking interrupt way:

In this example, 2 boards are connected through CAN bus. Endpoint A(board A) send a CAN Message to Endpoint B(board B) when user press space key in terminal. Endpoint B receive the message, print the message content to terminal and echo back the message. Endpoint A will increase the received message and waiting for the next transmission of the user initiated.

Supported Boards#

TWR-MC56F8200
Hardware requirements

  • Mini USB cable

  • TWR-MC56F8200 board

  • Personal Computer

Board hardware common setting

  1. HW reworkd(workaround):

    Connect J18(the mini USB port) pin4 and pin5. Note: This is due to HW design error, correct setting should be: J18 pin4 left empty and pin5 connected GND.

  2. Power setting:

    Connect J11 pin1 and pin2 Connect J6 pin1 and J7 pin2

  3. UART setting:

    Connect J8 pin3 and pin4 Connect J9 pin3 and pin4

  4. Onboard OSJTAG debugger setting:

    Connect J20 pin1 and pin2. Leave J17 open. Note: J17 is only used(connected) when firmware update for onboard debugger OSJTAG. Connect J21 pin 1-2, 3-4, 5-6, 7-8, to setup onboard debugger OSJTAG. Note: when use external debugger(connected to J14), leave all J21 pins open

Board settings

The example requires connecting between CAN pins of two TWR-MC56F8200 boards. The connection should be set as follows: On board:

  • J15-1, J15-2 connected

  • J16-1, J16-2 connected

  • J16-3, J16-4 connected Between TWR-MC56F8200 boards: node A connect to node B J13-3 J13-3 J13-4 J13-4 J13-5 J13-5

Prepare the Demo

  1. Connect USB cable between the host PC and the JM60 USB(J18) port on the target board. It setups OSJTAG and COM port in PC device manager.

  2. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board with OSJTAG debug configuration.

  4. 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 B terminal:
********* MSCAN Interrupt EXAMPLE *********
    Message format: Standard (11 bit id)
    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
Wait Node A to trigger the next transmission!

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

Rx MB ID: 0x321, Rx MB data: 0x2
Wait Node A to trigger the next transmission!

This message displays on the node A terminal:
********* MSCAN Interrupt EXAMPLE *********
    Message format: Standard (11 bit id)
    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, Tx MB data: 0x0
Press any key to trigger the next transmission!

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

Rx MB ID: 0x123, Tx MB data: 0x2
Press any key to trigger the next transmission!
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