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Use the on board RS232 instead of USB

Jonathan Sixt
Prodigy 170 points
Other Parts Discussed in Thread: TMS320C6678

The HUA demo uses the UART (platform_uart_write) to output start-up and other information and it seems to be using the USB (emulator) connection to the PC, how do I go about changing that to use the on board RS232 serial port?  I am using the TMDSEVM6678 evaluation module.  

Thanks in advance,

Chad

  • 0
    TI__Guru* 84110 points

    Chad,

    If I recall, there is a jumper on the board near the AMC connector that selects between these two interfaces. I apologize that I do not know for sure, but please check the Tech Ref for the board to see if this will do the job for you.

    Please let us know either way, whether this does work or does not.

    Regards,
    RandyP

  • 0 in reply to RandyP
    Prodigy 170 points

    Randy,

    You are correct:

    2.14 UART Interface
    A serial port is provided for UART communication by TMS320C6678. This serial port can be
    accessed either through USB connector (USB1) or through 3-pin (Tx, Rx and Gnd) serial port
    header (COM1). The selection can be made through UART Route Select shunt-post
    COM_SEL1 as follows:
    • UART over mini-USB Connector - Shunts installed over COM_SEL1.3- COM_SEL1.1 and
    COM_SEL1.4 - COM_SEL1.2 (Default)
    • UART over 3-Pin Header (COM1) - Shunts installed over COM_SEL1.3- COM_SEL1.5 and
    COM_SEL1.4 –COM_SEL1.6

    Just had to move the two jumpers (shunts) down one pin and it is working great...

    Thanks,

    Chad