I ran into a strange issue with serial init for STM32. If the UART is
already enabled/configured, our configuration does not seem to apply.
I discovered this because I used a bootloader to flash and run NuttX
on the arm/stm32/b-g474e-dpow1 board. The bootloader configs the UART
for 115200 baud 8E1.
This is how nsh looks if I type 'help' command:
nsh> [hp
hp usag hp [v] [md>]
d s mv s unam
[ p mb m sp umun
mp as mkd pn su uns
basnam dnam hp mkd pd s usp
bak dd hdump mh m m d
a h k mun md u
nsh> [
This is because Even Parity (and possibly other stale config) is still
in effect from the bootloader.
When I flash and run NuttX without the bootloader, the nsh prompt
works correctly with 115200 baud 8N1.
Has anyone seen this before?
