https://community.m5stack.com/topic/1576/m5core-problem-with-uart0/?
M5Core problem with UART0 | M5Stack Community
problemcommunity
https://cateee.net/lkddb/web-lkddb/BFIN_SIR0.html
Linux Kernel Driver DataBase: CONFIG_BFIN_SIR0: Blackfin SIR on UART0
linux kernel driver databaseconfig
https://tinker-board.asus.com/forum/index.php?/topic/15475-debian-11-3011tinkerboard-2s-how-the-change-baudrate-of-uart0-ttys0/
[Debian 11 - 3.0.11][TinkerBoard 2S] How the change baudrate of uart0 / ttyS0 - Software - Tinker...
Hello, When. in /boot/config.txt I enable uart0 and uart4 and define them with different baud rates, both are always initialized with 1500000 baudrate....