https://ncrmnt.org/2013/05/27/cs102-ii-%d0%b2%d1%81%d0%ba%d1%80%d1%8b%d1%82%d0%b8%d0%b5-%d0%b8-%d0%b4%d0%be%d0%b1%d0%b0%d0%b2%d0%bb%d0%b5%d0%bd%d0%b8%d0%b5-uart%d0%b0/?lang=ru