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