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Original question:

CC2640: CC2650: UART baud rate change

CC2541: CC2541: UART baud rate change

dflohr
Expert 1140 points
Part Number: CC2541

Using CC2541 and an external modem.

We are launching our code with default 115200 Baud rate.   We need to use that rate to give our modem a command to lower its Baud rate to 38400.  Once that command is issued,  we need to lower the CC2541 rate to 38400.

Can't figure out how to dynamically change baud rate once the CC2541 is already running.

Assistance appreciated.

Thanks.

  • 0
    TI__Mastermind 22935 points

    Hi Daniel,

    I recommend you start looking at the usage example in the following link:

    dev.ti.com/.../_u_a_r_t_8h.html

    You can see how it's setup in the usage example.

    Regarding your use case, you'll need to set it up initially at the 115200 baud rate you need, once you're finish with that, you'll need to close that UART instance using UART_close() (documented in the same link I provided above) to free that same UART channel and reconfigure it to the desired baud rate.

    Regards,

    Jesus

  • 0
    Guru 735685 points
    I suppose you can re-initialize UART again with new baud rate when you intend to change it.