Hi,
Polarian wrote:
I use a ch341 which has worked for me in the past, I have checked my
pinout many MANY times, I have tried cu on FreeBSD, and tio on Arch
Linux but the same issue keeps occurring. Baud-rate has been set to
115200 OpenBSD side in /etc/boot.conf as it was having issues with the
default 9600 (text was gibberish despite both sides being 9600).
So serial works, rx is fine I can read the output and I get the login
prompt, but tx is not working, I don't think its just openbsd as it
doesn't appear to be working in the bootloader either. Its not the
biggest deal as I can set the tty to fb0 and use a monitor and
keyboard, but carrying around a monitor and keyboard and copying text
over from my laptop is not ideal.
Have you checked all connections - jumpers and such? do you use a TTL
adapter?
I use serial for old SPARCs, serial do MIPS CI20 but not yet to the RPI,
although I guess it might be similar.
Using OpenBSD on a IBM ThinkCentre still with RS232 (mighty thing!) I
use minicom instead of cu, it allows me to set many parameters on the
fly, might worth a try.
Did you disable HW flow control and see if it helps?
I have weird situations like connection to certain SPARCs where LOM
needs flow control disabled but if the OS boots correctly to the prompt
(e.g another OpenBSD or Linux) I can use it regularly over console.
I believe it is a weird issue, still, worth checking.
Riccardo
