[mythtv-users] LCD / VFD problems

[Tim Hoad]

Sounds like you have the same display as comes with some Ahanix and Accent HTPC
cases. This VFD is not completely compatible with HD44780 as the character set
varies slightly. I has been suggested that this problem can be fixed by
altering the character mapping in hd44780-charmap.h (especially changing
character 255, which maps to a y with an umlaut in the NEC controller chip that
this VFD uses).

I currently have the same problem, but haven't fixed it yet (I have more
critical problems, like writing a driver for my iMon IR receiver). Please let
me know if you find a good solution.

Tim

> Quoting Dan Morphis <dan at milkcarton.com>:
>
> > mythml at wolke7.net wrote:
> >
> > > I have a SilverStone case with a built in VFD display. The driver is
> > >  supposed to be compatible to the HD44780 and I installed LCDd and
> > > recompiled MythTV without any problems. It basicly works fine and
> > > MythTV messages look quite nice (thanks to the developers!). But
> > > there are some "strange" effects:
> > >
> > > 1) When watching live TV there is something like a large "L" in the
> > > upper left corner. Everything else looks fine. Looking closer the "L"
> > >  actually is a vertical line and an underscore. The display has a
> > > "hardware-underscore", not dots but really a line below the 7x5 dots.
> > >
> >
> > Sounds to me like a driver issue.  As it works fine on my display.
> >
> > >
> > >
> > > 2) When listening to music the first (scrolling) line looks ok. But
> > > in the second line the progress indicator looks weird: a block that
> > > is not ccomplete (evolving from left to right) shows the underscore
> > > decribed above, looks fine otherwise. But when the block ought to be
> > > full it does not show a full block but a "y" with dots above (like an
> > >  umlaut-y, if such thing exists).
> >
> > Sounds to me like a driver issue.  As it works fine on my display.
> >
> > >
> > > 3) Real umlauts are not shown correctly in T nor music playback. The
> > > letters exist in the driver font but probabely at the wrong codes.
> > >
> >
> > Take a look at the code to be sure its putting the right data out to the
> > display.
> >
> > -dan
> >
>
>
>
>