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JasurDovurov
JasurDovurov
Associate
November 17, 2022
Question

How to Program STM32G031F6P* TSSOP20 package with ST-Link V2

  • November 17, 2022
  • 3 replies
  • 2550 views

Hi Engineers,

I am kinda new to the STM32 MCUs. I have a custom PCB powered with STM32G031F6P* TSSOP20 MCU. so on the PCB, I have a PIN "SWCLK", "SWDIO", GND, and VCC for programming. NRST is pulled HIGH. the strange thing is that BOOT-0 is on the same pin as SWCLK). and my ST-Link V2 can not connect to this PCB.

So my question is How do I program this chip? is this even possible to do?

I think I can program it with UART-1 and with the help of the BOOT-0 pin. But I do want to program this PCB with my current PCB design and configuration.

please help me with this issue!

I will attach the schematics

Best Regards

Jasur

0693W00000WIfPBQA1.png

This topic has been closed for replies.

3 replies

MM..1
MM..1
Chief III
November 17, 2022

You need NRST on programming pinheader.

Andreas Bolsch
Andreas Bolsch
Lead III
November 17, 2022

In general, you need neither NRST nor BOOT0 pin for attaching debugger/programmer via SWD (the state of BOOT0 - in this case shared with SWD pin - is only sampled during reset, hence don't care later on). BUT: Probably you've already flashed something into the controller?! And probably this program touches the pin configuration of PA13/14/15 and consequently disables the SWD interface?!

In this case, the debugger must attach while NRST is pulled low ...

So it's a good idea to have NRST on the programming header, but with some care, it's not really necessary.

JasurDovurov
JasurDovurovAuthor
Associate
November 17, 2022

@MM..1​ many thanks for your help, it actually helped and I also needed to remove pull up resistor.

But after all, I found a little solution after some investigation, I just configured the programmer to reset via software reset instead of hardware reset. you can see this in the attached photo.

0693W00000WIhbYQAT.png

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