Re: [lcd4linux] HD44780 lcd n/w

[Michael R. <re...@eu...>]

Hi Simon,

> small problem i have a REDHAT 9  2.4.20-8
> i got the source got it going but my lcd will not work got xterm to work 
> (no entries in stderr?)
> and got the X11 too work great...

> #lcd4linux -Fvv
[...]
> wiring: [DISPLAY:RS]<==>[PARPORT:AUTOFD]
> wiring: [display :rw ]<==>[parport:gnd]
> wiring: [display:enable]<==>[parport:strobe]
> wiring: [display:enable2]<==>[parport:select]
> wiring: [display:gpo]<==>[parport:init]
looks good...

> heres lcd4linux.conf
[...]
> Wire.RW "GND"               #RW (pin 5 lcd hardwired to ground)
> Wire.RS "AUTOFD"           #RS  (pin 4 lcd to pin 14 DB-25 "Autofd")
> Wire.ENABLE "STROBE"     #E (pin 6 lcd to pin 1 DB-25 "strobe")
> Wire.GPO "INIT
looks good, too, but just to be sure, you should add/modify these two lines:
Wire.ENABLE2 "GND"
Wire.GPO "GND"

> the data lines (DB0........DB7 on the display,DB1 ....DB8 on the 
> parrallel port)are connected directly
> RS pin 4 lcd to pin 14 "autofd"
> RW hardwired to gnd
> E pin 6 lcd to pin 1 DB-25
looks correct, too.

so your wiring seems to be ok. You did double-check, did you?

Does the display work with some other software? (lcdproc, or windows..)

What happens on the display a) if you connect power to it, and b) when 
you start lcd4linux?

Hmmm.... maybe you're facing the problem that the display requires 5V on 
the data lines, but your parport provides only 3.3V?

bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://members.eunet.at/reinelt
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