Improve SWO config (#481)
Improve SWO config (#481)

- on some ChibiOS boards the defaul for PB3 is an alternate funtion other than the RESET state which prevents the use of the pin for SWO

Signed-off-by: José Simões <1616ff7a83d123f98f8f38fa2524eab406644781@eclo.solutions>
nanoframework/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter