Load M4 firmware

[dry]

@LubOlimex:

 On the related note, is it possible to debug through JTAG that Cortex-M4 side? If I'm writing custom firmware.

I see JTAG lines, unsure if its same lines for all cores on this asmp chip? Anyone successfully debugged with JTAG (e.g. Segger, Olimex) that  M4 core?

[LubOlimex]

JTAG and SWD should be possible. You might need to force the no bootloader mode via SMT jumpers. Maybe some of the guys in the forum have more experience with it, we haven't tested it here. My advice is to also check the official STM forums (since the pins are free and available), maybe there is more info.