Hi,
Thank you. Yes the compiling is fine and ok for the hardware/driver level.
- This is not applicable as the arduino is embedded on the Odyssey board (impossible to change any USB link)
- Yes, I got the same error. I tried several combinations: port, board, debug or not, USB stack, … always the same error.
- Thanks for the link but going with sudo does not solve anything either …
I agree this should be at the ttyACM0 level (acces right, busy port or something like that, but I dont understand what and how to solve this). I’ve also thought about a baud rate problem, I’ve trie changing it with stty -F /dev/ttyACM0 1200 but this doesn’t change anything. I tried with an other version of bossac, same problem.
I end up having several arduino IDE installed, and several bootable Ubuntu installed on my SD drive. Maybe one of these is keeping this port ttyACM0 busy and preventing me from using it?
Don’t really known what’s left to try 
Regards,
,