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CCS/TMS570LC4357: UART serial communication not started from boost pack uart pins.

Chao Zhang
Prodigy 30 points
Part Number: TMS570LC4357

Tool/software: Code Composer Studio

Hi,

I have been using the SCI1 UART from the debug port all the time and it works fine. However, when I tried to use the sci1 on booster #2, serial communication does not work. I used a 3.3V FTDI breakout module from Sparkfun (https://www.sparkfun.com/products/9873). Is there any configuration I missed to enable that port?

Thanks,

Chao

  • 0
    TI__Guru**** 192306 points

    Hi Chao,

    Can you try SCI3 on J1 connector (pin 3 and pin4)? On launchpad, the SCI1 signals are routed to TM4C129 to the virtual COM port (micro USB).

  • 0 in reply to QJ Wang
    Prodigy 30 points

    Hi Wang,

    Many Thanks for your reply! 
    I have tried both sci3 and sci1, with simplest program which just reply any byte recieved from serial. When using sci1, I test the program with debug probe serial and verify it's working, as I can trigger the break point I set in debug mode. But when I send messages from the breakout board, I can see the "TXO" LED on the breakout is flashing, but it didn't trigger any break point I set, which means the TI never received the message. 
    The breakout board I used is https://www.sparkfun.com/products/9873, which uses FT232RL IC. I am wondering if this IC is compatible with TI or not. This breakout board works fine on any other arduino or ESP32 I got.

    Thanks,

    Chao

  • 0 in reply to Chao Zhang
    TI__Guru**** 192306 points

    Hi Chao,

    Have you make the SCI communication through Sparkfun breakout board work?