[lcd4linux] Re:strange HD44780 display

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

Hi Daniel,

> Thanks heaps for replying. I don't have any Wire.* entries in
> lcd4linux.conf. I soldered EN to INIT and RS to AUTOFD because the manual
> said that was the default. Does that mean that I actually have to put in
> Wire.* entries too?

No, you don't have to, if you follow the default. But you are not using 
the default: "Enable" should be "Strobe"

Which manual are you talking about? Maybe there's a glitch in the 
Documentation.

In the meantime I had a look at the datasheet you sent me. You did 
connect like the following:

Display  Parport
1 (DB7)  9 (DB7)
2 (DB6)  8 (DB6)
3 (DB5)  7 (DB5)
4 (DB4)  6 (DB4)
5 (DB3)  5 (DB3)
6 (DB2)  4 (DB2)
7 (DB1)  3 (DB1)
8 (DB0)  2 (DB0)
16 (EN)  1 (Strobe)
17 (RS)  14 (AutoFD)

This should work without any Wire.* entries.

If you want to stay with your wiring (Enable=Init), you should specify 
this line:
Wire.ENABLE Init


Another possible reason for this errors could be that your display needs 
+5V as a "high" signal, but yopur parport delivers 3.3V only.


bye, Michael

-- 
Michael Reinelt                                   Tel: +43 676 3079941
Geisslergasse 4                                   Fax: +43 316  692343
A-8045 Graz, Austria                          e-mail: re...@eu...