Giovanni wrote:WFI is not enabled by default in ChibiOS demos so it is not your problem.
Giovanni
there is a possibility that I've enabled it by mistake? how can i check it?
I'm not an expert like you, but the behaviour of my project& debugger, looks like the problem is the one reported... I've no any ideas, also becouse there aren't other things I've googled or that I can immagine....
The code was a very old demo heavily modified (possibly, even by more that one person)