add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally computed:
sha256  1c7adbb1a56dad4c4c781e6e023d77ac862842560c05246b691d07e9a4460ab2  4th-3.62.4-unix.tar.gz