Re: serial, basic stuff

On 2024-04-21 15:18:15 (+0200), Jon Clausen wrote:
> On 2024-04-21 14:45:51 (+0200), Dag-Erling Smørgrav wrote:
> > Jon Clausen <freebsd-questions@ymmv.dk> writes:
> > > So at this point, I should be ready to move on to attempting the setup that
> > > I actually want:
> > >
> > > jh05:cuau1 <-> jh06:ttyu0

> > If it's
> > still not working, I would suggest hooking up an oscilloscope to the
> > level shifter to check that it's working properly.

> Well, the oscilloscope I have is old, and I'm not convinced it even works.
> But the level shifter has been working very recently, so I have high
> confidence that it still is.

...and sure enough it still is, and I'm an idiot.

I've spent much much too long focusing on flags and connection settings,
without double checking that the actual basics were alright, because they
weren't.

I managed to overlook that I hadn't connected the RS232<->TTL adapter to the 
power supply pin on the board header. Once that was done, everything was fine.


So yeah - "basic stuff" indeed.

br
/jon

-- 
YMMV