Print in SWV on a 32L476GDISCOVERY

[nick_iliev]

Hello everyone!

My problem is supposed to be a very simple one. I use an interrupt to send messages to my PC, then I send a message back to my STM32. The message is received in good order but I can't print it out. I watched every single YouTube video out there, implemented every single solution (including connecting the SWO to the PB3 pin) - nothing works so far.

Can anyone tell me where am I mistaken?

My Debug Configuration:

Main.c, main.h, and syscalls.c are attached

[KDJEM.1]

Hello @nick_iliev and welcome to the community;

Are you able the see the message when using a terminal such as TeraTerm?

Could you please check the status of SB14 solder bridge.

Thank you.

Kaouthar

[nick_iliev]

Hello Kaouthar,

I use DockLight and I do get confirmation for a received message. I can also see the message in my Rx buffer during debugging via the variable explorer.

Thanks for the reply! Yes, the bridge seems to be unsoldered. Perhaps I have to solder it?

Best wishes,

Nick

[KDJEM.1 · Accepted solution]

Hello @nick_iliev ;

According the UM1879, to connect T_SWO pin in CN4 to PB3(SWO) pin you need to solder SB14.

Thank you.

Kaouthar

[nick_iliev]

Hello Kaouthar,

Yes, this appeared to be the problem. Thank you!

Best wishes,

Nick

[KDJEM.1]

Hello @nick_iliev ;

If the problem is resolved, please click on Accept as Solution on the reply which solved your issue.

Thank you

Kaouthar