* Update drv_usart.h

CH32V307的串口1外设是对接在APB2桥上，其他串口均对接在APB1桥上

已完全测试，并发现一个问题，已修正。

feat: move MRS demo source to bsp and libraries folder

feat: update Sconscript

feat: modify SConstruct in the bsp

feat: use the rtconfig.py of gd32vf103v-eval bsp to modify

feat: use the MRS's rtconfig.h temoporarily

feat: update Kconfig files

feat: use the MRS's .ld and rename as link.lds

feat: add ch32v1 porting folder

perf: remove board/system_ch32v10x.c

fix: define SOC_ARM_SERIES_CH32V103 in rtconfig.h

fix: add some neccessary macros in rtconfig.h

perf: use the menuconfig to generate rtconfig.h

feat: add readme.md

fix: correct the bad encode in main.c

fix: include board.h in main.c

perf: check and update README.md

perf: remove ch32f10x_port_cn.md

feat: ignore the standard libraries's CI checking

feat: add sdk_dist.py

fix: correct some style errors again

perf: simply the board/kconfig

fix: format ch32v103r-evt

fix: format drvs and libcpu

With USB Device Drivers

[BSP]添加STM32F10x HAL库的支持

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2088 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1505 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@226 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@56 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@6 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2 bbd45198-f89e-11dd-88c7-29a3b14d5316