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[Lcdproc] hd44780 weird display/driver problem


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  • From: straub AT sb-software.de (Marc-Oliver Straub)
  • Subject: [Lcdproc] hd44780 weird display/driver problem
  • Date: Wed Oct 2 08:26:02 2002

Am Dienstag, 01.10.02, um 10:19 Uhr (Europe/Berlin) schrieb Nick=20
Chidsey:

> I have a 40x2 HD44780 in the "winamp" wiring scheme.=A0=A0 Two weird=20=

> things, probably related:
> =A0 1)=A0 I HAVE to run LCDd once in "8bit" mode, THEN run in "winamp"=20=

> mode for anything to be displayed.=A0 Just running winamp makes a =
blank=20
> screen.=A0=A0=A0During 8bit, there is no display, but as soon as I =
close=20
> LCDd, the ending message shows up.=A0 (But it is garbled as described=20=

> below).
> =A0=A02)=A0=A0It=A0displays the first line, and some of the second =
line=20
> characters intertwined on line 1.=A0 Nothing ever shows up on line 2.
> =A0
> Note that as soon as I close the winamp mode, if I run it again it=20
> displays nothing, and I have to start over in 8bit mode.=A0=A0=A0 =
Uuuggh!=A0=A0=20
> Can anyone help me?=A0 Is it possible that any hd44780 uses different=20=

> protocols or wiring?

Some time ago, I had the same problems with my display. It had to do=20
with timing problems (a bug) in the winamp driver. Some multiplications=20=

with the multDelay variable had been missing in the initialization=20
section... I posted my changes to the list some time ago...

Bye, Oli





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