[Lcdproc] flaky hd44780

[Pierre Ossman]

On Thu, 20 Dec 2007 12:58:08 +0500
"Dmitry E. Mikhailov" <sexandvodka@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. :)

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org