gcc zz9fulltest.c gpio/ps_protocol.c -I./ -o zz9fulltest -march=armv8-a -mfloat-abi=hard -mfpu=neon-fp-armv8 -O0
gcc zz9readloop.c gpio/ps_protocol.c -I./ -o zz9readloop -march=armv8-a -mfloat-abi=hard -mfpu=neon-fp-armv8 -O0