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Using UART0 on the DK-TM4C129X

Peter Allnutt
Prodigy 60 points

The Getting Started Guide that ships with the dev kit says "This USB port provides JTAG debug and Virtual COM Port connectivity via the ICDI". Windows only shows two devices, the ICDI DFU and ICDI JTAG/SWD Interface. I don't get a Virtual Com Port listed in my devices yet many of the sample programs output to UART0.

UART0 is routed to the JTAG interface according to circuit information supplied. There is a J2 header called DEBUG UART but the documentation says for future use do not connect.

What's the recommended way to access UART0 and is it used for on board purposes that I should be aware of? Can I use J2 and get a USB Virtual Serial Port?

TIA

  • 0
    TI__Guru**** 244400 points

    Hello Peter

    The Virtual COM Port would be in Ports (COM & LPT). Make sure that J3 jumper is properly mounted.

    Regards

    Amit Ashara

  • 0 in reply to Amit Ashara
    Prodigy 60 points

    Thanks for the reply, it's made me go try the dev board on a 2nd computer. This indeed has a Stellaris Virtual Com Port so it's something strange about my development machine. No extra virtual com port appears nor does a device with errors. So it's either not there or masquerading as something different.

    Looks like my problem with my PC/configuration

    Thanks again

    P.S. Found it - It's called itself a Mentor Embedded USB Probe Serial #4 under modems. I guess because I had the Mentor Dev tools on some time ago.