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DVEVM355 Disabling Serial Comms Echo

SteveG10854
Intellectual 510 points

Hi, on the DM355 EVM how would I disable the serial comms character echo? As it is, all characters sent from Terminal via serial are then echoed back by the DVEVM to Terminal, how would I stop the EVM from sending back these echoed characters? Thanks.

  • 0
    TI__Mastermind 37340 points

    one way to do it is to use pass 'quiet' argument via bootargs; this should keep the kernel and anything after it from echoing the characters; if you need to do this before kernel comes up, then you may simply need to modify u-boot source code.

  • 0 in reply to Juan Gonzales
    Intellectual 510 points

    I've tried 'quiet' in bootargs and it does surpress a lot of the kernel boot messages, but it doesn't stop serially received characters being echoed back to the sender.

    In my application the terminal monitor will send characters serially to the DM355 and the monitor it will also effectively do a local echo, so I only need the TMS to send back it's responses to what it receives, rather than sending back all received characters too (else I get 'double' characters).

    If there is no ready command line option available, is there a particular file which performs this echo that I need to change? Thanks