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How to see Uart data on STM Discovery Board

Gary Olson

Hi, I am running M3/M4 Book Yui programs on the STM32 Discovery Board M4.
The program has puts or putch functions in the program. How would I see these
serial messages. I am using TeraTerm and I tried all Comm ports Tera Term has.
Not seeing serial port activity using teraterm.
Thank You

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  • 0 in reply to Gary Olson

    I found a way in Keil Menu

    View > Serial Windows > Debug (printf) Window

    There are also
    UART1
    UART2
    UART3
    But these don't show any output.

    the Debug (printf) window does show serial activity

  • 0 in reply to Gary Olson

    YIU not YUI

    Debug (printf) Window shows the SWV (Serial Wire Viewer) output, there will be code in there retargeting the console output via ITM_SendChar(), and the Debug/Trace pane enabling it.

    Unless you have connected up a serial port, and have it wired to a PC COM port in some fashion, it's not going to output to a Terminal. The ST Nucleo boards support a Virtual COM Port (VCP), but you'd still need to configure it's USART2 and pins, the Discovery boards do not support this functionality.