Re: [lcd4linux] T6963 High CPU Usage....

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

Hi Juergen,

> i have some problems with the 0.9.11 Version.
> Display Hitachi LMG7420 240x128pixel T6963 Chip.
> Redhat 8 on a 466Celeron Maschine with 256MB Ram
> lcd4linux.conf:
> 
> Display TLC1091
> Port 0x378 (/dev/ppdev does not work :-(   )
It should be /dev/parport0 (old /dev structure) or /dev/parport/0 (devfs)

> Compilling is ok. But when I start lcd4linux the proggy needs up to 1min 
> to Display something!
> My CPU Usage is over 50% for lcd4linux!!!!
> The last 4 columns are only mismatch... :-(

Hmmm... my T6963 works fine, without noticeable CPU load (but I've much 
faster machines than you).

Could you try running lcd4linux with debug enabled (lcd4linux -Fvv) and 
check for some strange errors?

Maybe you want to try the CVS version (but be warned that it is very 
different from 0.9, take a look at lcd4linux.conf.sample)

Another point may be that the T6963 is very sensitive to signal levels. 
It uses TTL levels (0V/5V), where many newer parallel ports provide 3.3V 
only. I built a special circuits with two additional IC's for this...


bye, Michael

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