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CCS/TMS570LS0714: DCAN BUSOFF TEST

HUA AO
Prodigy 10 points
Part Number: TMS570LS0714

Tool/software: Code Composer Studio

Hello,

I test Auto-Bus-On function in TMS570 today by shorting CANH and CANL, but I found it doesn't enter BUSOFF state. The Error and Status register also didn't inform the BUSOFF state.

But when emulator accessed to TMS570, BUSOFF happened.The emulator can supply power to TMS570 , it doesn't power other eletronic components, including CAN transceiver.

I want to know How can I test BUSOFF function and when BUSOFF will happen? Is my method wrong?

  • 0
    TI__Guru**** 197356 points
    Hello,

    1. make sure CAN bus works well. The nodes are communicating each other.
    2. use a wire to short the CAN_H and CAN_L, the CAN should enter BUSOFF state (error count reach to >255).
    3. remove the wire, the CAN communication will get back