Re: [lcd4linux] wiring

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

Wiktor Zgodzin'ski schrieb:
> I have just lunch lcd4linux, It works *Yeaa*, I had to change
> HD44780.c to fit my winamp wiring. But i have some other things witch
> i can't do.

There should be absolutely no need to change something in the C code 
just to achieve different wiring.... Thatrs what the "Wire.*" entires in 
the config file are for!

> On 17 pin of printer port *AUTOFD* i have some other device. In 
> documentation I found that this pin is not required in normal work, 
> this is  only optional if I plan to use more then 2 LCD or with 2 
> controllers. The problem is that lcd4linux during starts sends some 
> signals to this pin.
Well, that depends on your wiring configuration. There are three signals 
that may not be used:
- RW (Read/Write) may be hardwired to GND
- ENABLE2 is only used with big displays
- GPO is only used for the GPO latch if you have any GPO's

> 1) does lcd4linux sends signall to all pins of printer port

No, it does not. It uses (at least with ppdev() style controlling) the 
parport_frob() function, which allows us to change only specific 
signals, and leave the rest alone.


> 2) how can I set up  HD44780.c wiring section to fit my needs ?.
> 
> Currently I have sth like this:
> 
> Write.RW "GND"
> Write.RS "INIT"
 > Write.ENABLE "STROBE"
> Write.GPO "AUTOFD"

I think it should read "Wire", not "Write" :-)

If you don't have any GPO's, and want to leave the AUTOFD line alone, 
just specify

Wire.GPO GND
and
GPOs 0


Have Fun!

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