* [bsp] add missing UL suffix to BIT macro to prevent undefined behavior.
* [bsp] add UL suffix to BIT macro for consistency and readability.
* fix toUppercase.
* fix the abnormal character.
* format the file.
* 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>