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[Lcdproc] Crystalfontz 635 usb lcd noise


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  • From: fnacino AT internap.com (Frederick Nacino)
  • Subject: [Lcdproc] Crystalfontz 635 usb lcd noise
  • Date: Sat Mar 25 02:37:01 2006

Amazingly it works wonderfully at 16x2! (No BigClock at 16x2 but
everything else works really nice!) I hope this gives a clue as to how
to get the full use of every pixel on my 635!

Fred

Andrew Foss wrote:

> The hearts sound more like data corruption. Bummer that's a hard one.
> How does it look if you try 20x2 or 16x2?
>
> Andrew
>
> -----Original Message-----
> From: Frederick Nacino
> [mailto:fnacino AT internap.com]
> Sent: Fri Mar 24 17:03:20 2006
> To:
> lcdproc AT lists.omnipotent.net
> Subject: Re: [Lcdproc] Crystalfontz 635 usb lcd noise
>
> I was thinking maybe it isn't serial noise but it's seems almost as if
> the data being transmitted from the LCDd to the display is happening
> too fast and certain things just don't get recognized by the display.
> I'd like to lower the baud rate but I was told this wouldn't work for
> USB devices. I did realize that the USB=yes option wasn't set so I set
> it and it seems my problem got a little worse in that I will sometimes
> get a bunch of hearts now along with my original problem when I use
> BigClock. I'm running linux 2.4.26 btw and yes 635 is 20x4.
>
> Fred
>
> Andrew Foss wrote:
>
> > hmmm, it's highly unlikely to be serial noise, that's the good news.
> > Have you tried creating a test widget and sending text to a specific
> > location, like row 1 column 1 and row2 column 16 or such and
> > confirming that the driver's putting your text in the right location?
> >
> > Also, for diagnosis I might suggest seeing if you set the screen to
> > 16x2 do you get at least 2 rows of 16 that behave normally, the 635 is
> > 20x4 isn't it?
> >
> > andrew
> >
> > Frederick Nacino wrote:
> >
> >> I've scoured the archives for some help with no luck. I have a
> >> Crystalfontz 635 USB and it's running on linux. Running lcdproc the
> >> display generally works however although I am not getting garbage, I
> >> seem to be getting residual data from previous screens littering my
> >> current screen. Trying to clear bad data out by sending blank lines
> >> to the display does not work. Other problems include menu widgets
> >> not appearing in the correct position or data not appearing when it
> >> should. Things that generally have to do with graphics and screen
> >> cursor positioning seem to fair worse than trying to display normal
> >> text, for example displaying the BigClock lcdproc client seems to be
> >> my worst offender as it is halfway unreadable and always leaves
> >> residue that cannot be cleaned up by subsequent screens.. I'm running
> >> current lcdproc code as of 3/14/2006. Screen size settings look good
> >> as well as does my conf. I am not sure what to make of what I am
> >> seeing or how to correct it. Any help would be great.
> >>
> >> Thanks!
> >> Fred
> >> ---
> >> http://www.internap.com/
>
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