Ok, I think I've understtod that the way to recover the chips is to implement in my applicative code a boot sequence as you've described in your touchless document.

If yes, I'm currently writing it.
As I've already included the UART code, I would just like to add it in my command line interpreter, but for the moment I'm debugging it.
It should take a few days to finish it and then my applicative code will allow to jump to boot sequence.


So, Per, If you still agree, I will send you the 4 chips and an hex file in a few days to programm it.


Regards
Stephane