I can upload code with the Arduino IDE (it uses bossac 1.7.0)
I can upload code with
platform = firstname.lastname@example.org
board = adafruit_feather_m0
framework = arduino
But if I use
platform = atmelsam
I can upload the code only once but then it “kills” the port and I can’t read Serial data nor upload new code !
The only way to get it back to upload is to force a reset with a double clic.
(but still, the com port is not working)