Some IP blocks need to be disabled to modify some registers. David
On Thu, Sep 3, 2020, 3:45 PM Nathan Hartman <hartman.nat...@gmail.com> wrote: > 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? >
