RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ lts-v4.1.x

spogulis no https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

xieyangrun 189c999f8e add atmel SAM D21 bsp support		8 gadi atpakaļ
..
stdio_serial	189c999f8e add atmel SAM D21 bsp support	8 gadi atpakaļ
read.c	189c999f8e add atmel SAM D21 bsp support	8 gadi atpakaļ
write.c	189c999f8e add atmel SAM D21 bsp support	8 gadi atpakaļ