RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ ac9c373d7fb3f31f00a640e55841a1a330f4f9ac

réplica de https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

bernard.xiong@gmail.com 1c56553b04 Add BAUD_RATE_4800 definition.		%!s(int64=13) %!d(string=hai) anos
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drivers	1c56553b04 Add BAUD_RATE_4800 definition.	%!s(int64=13) %!d(string=hai) anos
rtdevice.h	db58e3350b add serial DMA transmit function(beta)	%!s(int64=13) %!d(string=hai) anos