[mythtv-users] LCD / VFD problems

Thomas mythml at wolke7.net
Fri Jul 9 11:02:46 EDT 2004 

Hi Oliver and all,

no, it is not exactly that device. My controller is connected to the 
parallel port, not by USB.

But the font and even the display driver seems to be the same. I have 
found the two triangles which I described below at code 14h=20d in your 
patch. Do you have complete instructions for the controller used in 
your display?

The only thing close to my display is the HD44780U. There is a version 
called "ROM Code A02" which has the y-umlaut at 255 and the double 
triangle at 20. But some other codes (for example decimal 16-19) do not 
match my display. I wonder how many variants are out there...

Thomas

Am 09.07.2004 um 09:59 schrieb Oliver Stabel:

> Hi,
>
> is this the device that comes with the D.Vine 5 or Dign HV5 and is 
> using a
> driver from Sasem?
> If so then I can provide you an IR driver for LIRC and VFD for LCDProc.
> Check <http://www.hometheaterpc.info/blog> for more information.
>
> Oliver
>
>> 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
>>>
>>>
>>
>> --Apple-Mail-62--617981991
>> Content-Transfer-Encoding: 7bit
>> Content-Type: text/enriched;
>> 	charset=US-ASCII
>>
>> 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:
>>
>>
>> <excerpt><bold><color><param>0000,0000,0000</param>Von:
>> </color></bold>Tim Hoad <<tim-lists at hoad.id.au>
>>
>> <bold><color><param>0000,0000,0000</param>Datum: </color></bold>9.
>> Juli 2004 02:47:13 MESZ
>>
>> <bold><color><param>0000,0000,0000</param>An:
>> </color></bold>mythtv-users at mythtv.org
>>
>> <bold><color><param>0000,0000,0000</param>Betreff: </color>Re:
>> [mythtv-users] LCD / VFD problems
>>
>> <color><param>0000,0000,0000</param>Antwort an:
>> </color></bold>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
>>
>>
>> <excerpt>Quoting Dan Morphis <<dan at milkcarton.com>:
>>
>>
>> <excerpt>mythml at wolke7.net wrote:
>>
>>
>> <excerpt>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.
>>
>>
>> </excerpt>
>>
>> Sounds to me like a driver issue.  As it works fine on my display.
>>
>>
>> <excerpt>
>>
>>
>> 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).
>>
>> </excerpt>
>>
>> Sounds to me like a driver issue.  As it works fine on my display.
>>
>>
>> <excerpt>
>>
>> 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.
>>
>>
>> </excerpt>
>>
>> Take a look at the code to be sure its putting the right data out to
>> the
>>
>> display.
>>
>>
>> -dan
>>
>>
>> </excerpt>
>>
>>
>>
>>
>> </excerpt>
>>
>>
>>
>> _______________________________________________
>>
>> mythtv-users mailing list
>>
>> mythtv-users at mythtv.org
>>
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>
>>
>>
>> </excerpt>
>> --Apple-Mail-62--617981991--
>>
>>
>
> -- 
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