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[Lcdproc] flaky hd44780


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  • From: peter AT adpm.de (Peter Marschall)
  • Subject: [Lcdproc] flaky hd44780
  • Date: Wed Dec 26 15:44:01 2007

Hi Pierre,

On Thursday, 20. December 2007, Pierre Ossman wrote:
> On Thu, 20 Dec 2007 12:58:08 +0500
>
> "Dmitry E. Mikhailov"
> <sexandvodka AT gmail.com>
> wrote:
> > On Thursday 20 December 2007 10:53:14 am Pierre Ossman wrote:
> > > I have a SilverStone L03v case with a parallell port HD44780 in it
> > > which I've had some problem with. Lately, it went completely useless as
> > > the data starting shuffling around the display like crazy.
> >
> > What exactly was was is looking like?
>
> Every update or so, both lines shifted to the left. I guess the scroll
> feature of the chip just moves everything every time there is a write to
> the rightmost cells.
>
> > I had a (may be similar) problem with my parallel 40x4 (pseudo-) HD44780
> > display: top two lines were updated correctly, while bottom ones were
> > just scrolled with original content.
> >
> > It was solved by rewiring LCD from 8bit to 4bit connection
>
> This is not a custom built module, so I'd hope it is wired correctly. :)

Thanks for the info.

After testing the new init sequence with two USB connection types and seeing
no adverse effects I just committed it to CVS

Thanks for supporting LCDproc.

Regards
Peter
--
Peter Marschall
peter AT adpm.de




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