Debug STM32F0 with SWD (STLINK - V3) - ANSWERED

[ValentinG]

Hello,

I want to program (first time) an STM32F042K6 with STLINK-V3SET using SWD.

When I try to "connect" with STM32CubeProgrammer, I get these informations : "Error : No STM32 target found!". Here is a screen :

The connections are :

I tried to run the µC forcing PB8(BOOT0) low and high, but I got the same problem.

I have some ideas but I didn't find anything in the docs :

1) I'm using STLINK-V3SET with MB1440B, it is an extension board provided by ST. Is there any jumper we need to add or remove (according to the docs, I would say no but...)

2) Maybe STM32CubeProgrammer configuration is wrong ?

3) It is the first time I program this chip, maybe I need to use the bootloader ?

Thank you,

Best regards,

Valentin

[Tesla DeLorean · Accepted solution]

It could be a connectivity issue, especially if you haven't qualified the hardware yet.

For CM0 parts would suggest trying 4 MHz connect speed rather than 24 MHz​

[Uwe Bonnes]

This is probably theissue V3 has with some STM32 families using WFI. When creating the access port, V3 always fails, while V2 succeeds. Try connect "Hardware reset" or use another debugger as long as this behaviour of the V3 is not fixed.

[ValentinG]

Hi Clive, thank you for you answser.

I tried all frequency (from 5 kHz to 24 MHz).

You're definitely right, I'll check again the welds. Do you think my connections are correct ?

[ValentinG]

Actually you were right, one pin was not welded correctly. Thank you !

[ValentinG]

Hi Uwe Bonnes, thank you for you reply. I got the solution : the connections are correct but one pin was not welded correctly. 

[ValentinG]

To conclude with my question : the connections (see tab above) are correct.

We do not need to enter in bootloader mode, so PB8(BOOT0) does not need to be set.

One pin was not welded correctly.