add code from mkstepper for atsamd51 utils

README.md

circuit/mkbldcdriver/eagle.epf

embedded/mkbldcdriver-v03/mkbldcdriver-v03/Debug/Makefile

embedded/mkbldcdriver-v03/mkbldcdriver-v03/Debug/makedep.mk

embedded/mkbldcdriver-v03/mkbldcdriver-v03/hardware.h

embedded/mkbldcdriver-v03/mkbldcdriver-v03/main.c

.../mkbldcdriver-v03/mkbldcdriver-v03/mkbldcdriver-v03.cproj

embedded/mkbldcdriver-v03/mkbldcdriver-v03/pin.c

embedded/mkbldcdriver-v03/mkbldcdriver-v03/pin.h

embedded/mkbldcdriver-v03/mkbldcdriver-v03/pwm_foc.c

embedded/mkbldcdriver-v03/mkbldcdriver-v03/pwm_foc.h

embedded/mkbldcdriver-v03/mkbldcdriver-v03/ringbuffer.c

embedded/mkbldcdriver-v03/mkbldcdriver-v03/ringbuffer.h

embedded/mkbldcdriver-v03/mkbldcdriver-v03/spiport.c

embedded/mkbldcdriver-v03/mkbldcdriver-v03/spiport.h

embedded/mkbldcdriver-v03/mkbldcdriver-v03/uartport.c

embedded/mkbldcdriver-v03/mkbldcdriver-v03/uartport.h

test/stand-inertia/Bearing Retainer.stl

test/stand-inertia/Main Body.stl

test/stand-inertia/Motor Housing.stl