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Thread: Error in XMC4400 CAN Auto Baud Rate Detection

  1. #1
    New Member New Member khageshc is on a distinguished road
    Join Date
    Jul 2018

    Error in XMC4400 CAN Auto Baud Rate Detection


    I am using CAN auto baud rate detection example provided by Infineon. Below are the modification details which are done in example to port in our code.

    Software changes:
    1. CAN frequency configured to 60MHz instead of 12MHz
    2. Polling based mechanism is implemented instead of interrupt based mechanism to read the CFC in Bit timing analysis mode.

    We are not getting correct Baud rate prescaler (BRP) value by using the example, but we are getting proper Tseq1 and Tseq2 value from table which are given in example code.

    Is there any way to get correct BRP value?


  2. #2
    Beginner Beginner
    Infineon Employee
    Infineon Employee
    SunYajun is on a distinguished road
    Join Date
    Nov 2014
    the CAN BSL mode works on the external clock. the max. input clock f_osc in the XMC4400 is specified between 4..40MHz (in direct input mode) or 4..25MHz (in crystal mode). An input clock of 60MHz is too large here.

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