• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 227 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ARM Communications via UART Down

Reino Harmse
Intellectual 330 points

Other Parts Discussed in Thread: OMAPL138

Hi,

I am currently working on an OMAPL138. During the development of the DSP executable, communications via a UART channel to TeraTerm was used for debugging purposes. The communication's code was based on TI's example code and worked fine.

I am now in the process of coding the ARM. The ARM is printing lines to terminal running Minicom using the printf statement. This works fine until the DSP executable is loaded and starts to run. The DSP is still able to communicate (now to TeraTerm) with the same code, but all communications to and from the ARM is lost.    

Even if I remove all UART_TxString commands from the DSP code and remove the initialization of the UART port from the DSP code, communications from the ARM is still lost when the DSP executable starts.

Can anyone please tell me why this is and how to avoid it?

  • 0
    TI__Mastermind 35645 points

    Hi Reino,

    Thanks for your post.

    Could you please ensure the UART initialization and baudrate configuration is taken care from the ARM side? If the Uart configuration is taken out from DSP side, it should be initialized from ARM side and this is my understanding. Also, on the terminal (minicom), please take care the UART serial port settings like baudrate etc. are configured properly or not.

    In case, UART is initialized properly and still the communication is lost to & from the ARM, please debug the code and check the code where it hangs?

    In my opinion, it might be a  UART configuration issue on the terminal. Please check it.

    Thanks & regards,

    Sivaraj K

    ------------------------------------------------------------------------------------------------------- 
    Please click the Verify Answer button on this post if it answers your question.
    -------------------------------------------------------------------------------------------------------