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MSPM0G3507: How to dynamically change UART baud rate

Jerry Kuo
Expert 4710 points

Part Number: MSPM0G3507

Hi team,

My customer is asking how to dynamically switch UART baud rate ? For example, change from 9600 to 115200 bps.

Thank you.

  • 0
    TI__Prodigy 620 points

    The Baud Rate can be changed dynamically using the divisor register IBRD or FBRD, found in section 23.3.32/33 of the TRM respectively.

    In order to change the baud rate, the application must wait for the current transmission to finish and for both lines to IDLE before writing the new divisor to the IBRD/FBRD register. This write will change the baud rate of the peripheral. 

    This change MUST be followed by a write to the UART.LCRH register. Baud rate calculation, usage of the IBRD, FBRD, and LCRH register are outlined in section 23.2.3.4 of the TRM.

    Best Regards,

    Tyler

  • 0 in reply to Tyler Morgan
    TI__Expert 4710 points

    Hi Tyler,

    Thanks for your information. I will let customer feedback if this solve their problem. Thank you.