Fwd: [mythtv-users] LCD / VFD problems

[Thomas]

Tim,

that has been a good hint. I tried that immediately and it actually 
changes the output.

The problem I have now is that I do not find any information of the 
character set in that display. The controller is a D16314AQJ by NEC. 
NEC lists all kinds of controllers - except this one :-(

I then looked for Samsung information since they build the VFD tube. I 
have found one document but it has a character set different to my 
hardware.

So do you have any information about a controller that shows the 
y-umlaut at character 255? It should show two upward pointing triangles 
at character 20. In my documents this is a full block (good replacement 
for 255), but my controller thinks the two triangles are a better 
choice to show ;-)

Thomas

Anfang der weitergeleiteten E-Mail:

> Von: Tim Hoad <tim-lists at hoad.id.au>
> Datum: 9. Juli 2004 02:47:13 MESZ
> An: mythtv-users at mythtv.org
> Betreff: Re: [mythtv-users] LCD / VFD problems
> Antwort an: Discussion about mythtv <mythtv-users at mythtv.org>
>
> 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
>>>
>>
>>
>>
>>
>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 3583 bytes
Desc: not available
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20040709/c51d1fe8/attachment-0001.bin