Nucleo-F072RB Serial port not working

[dyMath6]

Hi, I'm a student quite new with STM, I am using a nucleo F072RB and I have been unable to print anything onto putty for a few weeks, it was working fine before summer break but not anymore (I haven't used my nucleo during that time), I am using the same baud rate and same port com as before, I tried to run my older projects that use putty and same result, nothing appears. I have no idea what to do to try to solve it, please help. Thanks.

[Andrew Neil]

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@dyMath6 wrote:

 I'm not sure what you mean by "expected COMx number",

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I mean does the COMx number you're using in your terminal match the COMx number shown for the board in Device Manager?

[unsigned_char_array]

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@dyMath6 wrote:

I'm left with the port drivers though I'm not sure where to look for that

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In device manager double click or right click and select properties. The go to the driver tab.

[Andrew Neil]

Have you tried the oscilloscope test yet to see if there is any activity?

Your NUCLEO-F072RB board has a jumper - CN3 - on the ST-Link section where you can probe:

Also probe on the Arduino CN9 header:

(and/or CN10).

Do you see activity on TX when the STM32 is transmitting ?

Do you see activity on RX when the terminal is transmitting ?

PS:

If you disable the TX & RX pins on the STM32F072 Target, you can put a jumper on CN3 and do a loop-back test from the terminal.

[Andrew Neil]

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@Andrew Neil wrote:

(and/or CN10)

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Note that the Arduino D1 and D2 pins (CN9.2 & CN9.1) are connected to CN10 pins 35 & 37:

https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf#page=30

via: https://www.st.com/en/evaluation-tools/nucleo-f072rb.html#documentation