root/rt-thread @ 840eff05ca11bd4e06b2d0bb8e677bef167c2dec

chenchaoqun@rt-thread.com bb8e89e851 【串口】宏定义对应增加		7 lat temu
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applications	80a21100b3 remove uart rx code	8 lat temu
asflib_config	189c999f8e add atmel SAM D21 bsp support	8 lat temu
board	189c999f8e add atmel SAM D21 bsp support	8 lat temu
sam_d2x_asflib	62058e18fe [bsp][samd21] update scons script.	7 lat temu
README.txt	84f0d9f988 Update README.txt	8 lat temu
SAM_D2X_RTT.sct	5b1235f5f5 add scons cmd build	8 lat temu
SConscript	189c999f8e add atmel SAM D21 bsp support	8 lat temu
SConstruct	189c999f8e add atmel SAM D21 bsp support	8 lat temu
project.uvprojx	0f3563fd64 [BSP] Update project files	8 lat temu
rtconfig.h	bb8e89e851 【串口】宏定义对应增加	7 lat temu
rtconfig.py	62058e18fe [bsp][samd21] update scons script.	7 lat temu
template.uvprojx	189c999f8e add atmel SAM D21 bsp support	8 lat temu

		
				README.txt
			
				使用SAMD21-Xplained-Pro开发板
scons:
  scons
  scons --target=mdk5
demo代码演示了串口、外部中断、RTC低功耗唤醒