[FR] [Help needed] Support SAM4 with CMSIS and other frameworks

[chepo92]

I'm looking for a compiling and programming alternative to Atmel SAM4 (32-bit ARM® Cortex®-M4 ) , as the only way to create code for it is Atmel Studio, the board has very powerful specs, CAN, Ethernet, FPU, AFE, AES, but somehow has been forgotten and never supported in another IDE

[chepo92]

I created a board for duet based on adafruit grand central m4, still not complete and I think I'm missing the right flags but it's a start, using CMSIS from #81
added to platform.ini:
[env:atsam4]
platform = atmelsam
framework = cmsis
board = duet_m4

and ran pio -e atsam4 -v

duet_m4.zip

I'm getting some errors including "Library does not support the specified device." and "unknown type name 'uint32_t'"

I attach the output
compiler Atsam4 error.txt