HI! Thanks a lot!
The problem was with some defective delay routines (I didn't make them) that
where too small for this screen. When I replaced all the delays with the
ones I always use, voila!!

Still some problems remain, like not erasing everything for some reason.
It's like if the screen is missing some bits I send. I think its still
related to the delays, so I'm looking for everything.

Regards

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
> Behalf Of I. Forse
> Sent: Monday, February 11, 2008 18:25
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] Graphic LCD
> 
> I have written some routines for the SP 5-GFX1 from Lascar Electronics
> www.lascarelectronics.com, it also uses the Sunplus SPLC501C.  It uses
> the serial interface but the startup routine might help.  Look at
> function gfx1_start_up() in the file gfc1_ser_dr.c.  Also note that
> things like column addresses may not be where you expect them because
> it
> depends on the physical COG connections..
> http://www.geocities.com/g13685/sub_index.html
> 
> Regards
> 
> Ian
> 
> Mauricio Jancic wrote:
> > Hello,
> > 	I've been dealing with this for a week now and haven't yet found
> a
> > solution, perhaps someone here had a similar experience.
> >
> > 	I'm using a NewHaven graphic lcd (128x64 part no.
> > NHD-LGC12864CZ-FSW-GBW). It's a COG LCD with a SPLC501C controller
> chip.
> >
> > 	I bought some LCD routines from embedded-code.com and I'm trying
> to
> > make everything work.
> >
> > 	The main problem is the initialization routine of the LCD. Since
> the
> > LCD routines are licence protected I can post the code, but I'll post
> some
> > bits of information:
> >
> > First, the initialization routine, as described on the datasheet is:
> >
> > 	lcd_set_reset_pin(0);
> > 	lcd_delay_ms(2);
> > 	lcd_set_reset_pin(1);
> > 	lcd_delay_ms(20);
> >
> >
> > 	//----- DO THE CONFIGURATION COMMAND SEQUENCE -----
> > 	wrt_cmd(0xa2);
> > 	wrt_cmd(0xa0);
> > 	wrt_cmd(0xc8);
> > 	wrt_cmd(0x25);
> > 	wrt_cmd(0x81);
> > 	wrt_cmd(0x10);
> > 	wrt_cmd(0x2F);
> > 	wrt_cmd(0xAF);
> > 	wrt_cmd(0xA5);
> >
> > 	while(1);
> >
> > This should initialize the LCD and show a screen with all the dots ON
> > (command 0xA5).
> >
> > The wrt_cmd() routine is the following:
> >
> >
> > 	LCD_DATA_BUS = data;
> >
> > 	//Setup control pins
> > 	LCD_CS1 = 0;
> > 	LCD_RW = 1;
> > 	LCD_RD = 1;
> > 	LCD_DC = 0;						//DC low for
> > a command
> >
> > 	ACCESS_DELAY;
> > 	//Latch in the byte
> > 	LCD_RW = 0;
> > 	ACCESS_DELAY;						//Pause
> >
> > 	LCD_RW = 1;
> >
> > 	LCD_CS1 = 1;
> >
> > My control pins C86 and PS in the LCD are set to LOW and HIGH
> respectively.
> >
> > The main problem I found is that the built in inverter is not
> working,
> > because I don't see the expected voltages on pins V1 to V5, all of
> them have
> > 3.25 v (that's the LCD voltage).
> >
> > I'm attaching the schematic, should it clarify more.
> >
> > Any help you can provide will be appreciated.
> >
> > Regards,
> >
> > Mauricio
> >
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