[Lcdproc] 4bit-HD44780 and keymatrix...

[Markus Dolze]

Hi,

-------- Original-Nachricht --------
> Datum: Wed, 23 Dec 2009 22:11:19 +0100
> Von: "Markus Dolze" <bsdfan at nurfuerspam.de>
> An: "Thorsten Godau" <dl9sec at gmx.net>, lcdproc at lists.omnipotent.net
> Betreff: Re: [Lcdproc] 4bit-HD44780 and keymatrix...

> > 
> > My keymatrix is the following:
> > 
> >   +5V ----------+---------+--------+---------+
> >                 |         |        |         |
> >                22k       22k      22k       22k
> >                 |         |        |         |
> >    Y7 -|<|--+---------+--------+---------+   |
> >             |   |     |   |    |   |     |   |
> >             o   |     o   |    o   |     o   |
> >           S1 \  |   S2 \  |  S3 \  |   S4 \  |
> >             o   |     o   |    o   |     o   |
> >             |   |     |   |    |   |     |   |
> >             +---+     +---+    +---+     +---+
> >                 |         |        |         |
> >                 |         |        |         |
> >    Y8 -|<|--+------------------+---------+   |
> >             |   |         |    |   |     |   |
> >             o   |         |    o   |     o   |
> >           S5 \  |         |  S6 \  |   S7 \  |
> >             o   |         |    o   |     o   |
> >             |   |         |    |   |     |   |
> >             +---+         |    +---+     +---+
> >                 |         |        |         |
> >    X1 ----------+         |        |         |
> >                           |        |         |
> >    X2 --------------------+        |         |
> >                                    |         |
> >    X3 -----------------------------+         |
> >                                              |
> >    X4 ---------------------------------------+ 
> > 
...
> 
> The 'keymatrix' setting counts from '1' whereas the Y# and X# lines are
> counted from '0' in the documentation.
> 

Your description in the drawing uses the names for Y#/X# like in the HTML documentation. Counting starts from '1' there as well. I was looking at the code comments, where Y#/X# are counted from '0'. I should change this eventually.

Can you try what happens if you connect Y7 to 'D0' and Y8 to 'D1' on the parallel port?

Regards,
Markus