UART Usage

Description

EXT-iCore-3576Q38 use "UART11" for "RS485", which is "/dev/ttyS11" in
system. Extended interface using "UART8" for common uart,which is
"/dev/ttyS8" in system.

Interfaces:



RS485 Usage

   # close echo
   sudo stty -F /dev/ttyS11 -echo
   # transmit
   sudo echo "firefly uart test..." > /dev/ttyS11
   # receive
   sudo cat /dev/ttyS11