@matteoprati said in Impossible to update Firmware:
Couple of weeks ago, the printer stopped working
What initially went wrong? Generally, updating the firmware is not the first thing to do, as it can cause it's own issues.
Generally, if BOSSA can't detect a board, it's usually because the firmware hasn't been erased. Are you sure you are putting the jumper on the 'erase' pin on the Duet? What does the Duet show as in Windows Device Manager?
When BOSSA is used to flash the SAME70 processor in the MB6HC, the processor uses the USB port in high speed mode (unlike the processors used in other Duets). This means that the length and quality of the USB cable is especially important. USB cables that can be used to send GCode commands and receive replies to/from a Duet MB6HC that is running RepRapFirmware may not be suitable for flashing the firmware using BOSSA. Try a different USB cable.
Also disconnect any attached PanelDue (which can cause interference), and don't turn on the PSU, only power the 6HC from the USB cable (to avoid ground loops). What version is your 6HC? Does it have a USB-C port, or an older mini USB port?
SAM-BA doesn't work with the 6HC. I've only ever got it working with the Duet 2. I nearly bricked a 6HC the last time I tried using it, so please don't use it!
Ian