* Synchronize the code of the rt mart branch to the master branch. * TTY device * Add lwP code from rt-smart * Add vnode in DFS, but DFS will be re-write for rt-smart * There are three libcpu for rt-smart: * arm/cortex-a, arm/aarch64 * riscv64 Co-authored-by: Rbb666 <zhangbingru@rt-thread.com> Co-authored-by: zhkag <zhkag@foxmail.com>
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![](/libs/rt-thread/raw/commit/776764c4d68c6bb4dac09e7b53f0fbb6857aa27a/bsp/allwinner/d1s/figures/MQ5.png)