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uc2013135191
uc2013135191
Associate III
July 14, 2015
Question

STM32F429I-Discovery Missing serial COM?

  • July 14, 2015
  • 2 replies
  • 630 views
Posted on July 14, 2015 at 22:12

Hi Everyone.

I'm having some doubts about the discovery boards.

I have a nucleo board and a STM32F429I discovery board (the one with a LCD).

In the nucleo board I had next to no problems sending data to the serial monitor (weird that it was missing a 0-ohm resistors for the pinout on those USART pins).

In the Discovery boards it doesn't even show a COM. It only adds a ''Universal Serial Bus Devices'' called ''STM32 STLink''. Is this normal? Maybe a driver I am missing that I can't find? Or a hardware config?

 Doesn't STLink allow Serial-USB conversion in a set USART like in the nucleo boards?

It seems PA10 (USART1_RX) and PA9 (USART_TX) seems to be connected to the ST link according to the schematic.

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    2 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    July 14, 2015
    Posted on July 14, 2015 at 22:40

    This has been discussed here several times.

    The ST-LINK firmware on the DISCO boards does not support VCP/USART communication. ST would need to decide to do this, or explain why they can't.

    On the DISCO board the SWO/SWV is usually viable, sometimes a solder-bridge (SB) has to be made for it to work. The ST-LINK Utilities have an SWV Viewer Window. Works also in Keil, and to my understanding IAR also.

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    uc2013135191
    uc2013135191Author
    Associate III
    July 19, 2015
    Posted on July 19, 2015 at 02:02

    Hi clive,

    Thank you very much for you quick answer.

    Too bad it does not work :\ It seems the hardware connection is already made! (at least after a quick glance at the schematic) Weird.

    I'm sorry if I am making you repeat yourself, I could not find anything on this (I actually have a hard time finding answers to my questions in the forum search option).

    I have to check out ST-LINK Utilities and IAR tools more. I usually used other IDE (and never used ST-LINK Utilities).

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