I have tried the pseucode in the datasheet. I go home
and try yours again. Somehow my LCD operation is much
more consistent when I prolong the delay...... Yet the
reset part is still problematic at times. 

Thanks,
john

--- "M. Adam Davis" <stienman@gmail.com> wrote:

> What is your LCD init routine?  I've never
> experienced that problem
> with the cheap LCDs I have used with this routine:
> 
> write4 just writes 4 bits to the LCD interface,
> write8 writes 8 bits
> in two cycles of 4 bits.  The rest should be pretty
> explanatory,
> except for the ??? which I sure could be determined
> from the data
> sheet in short order.
> 
> void initlcd(void)
> {
> 	delayms(20);	// Wait for LCD to power up ( >15ms )
> 	RS=0;		// Set RS low for instruction
> 	write4(3);	// Set interface to 8 bits
> 	delayms(5);	// Wait for LCD execute instruction (
> >4.1ms )
> 	write4(3);	// Set interface to 8 bits
> 	delayms(1);	// Wait for LCD execute instruction (
> >100us )
> 	write4(3);	// Set interface to 8 bits
> 	delayms(5);  	// Wait for LCD execute instruction
> (At this point
> 			// we could actually start using the busy flag)
> 	write4(2);	// Set the display to 4 bit interface
> 	delayms(5);	// Wait for LCD execute instruction
> 	write8(0x28);	// Set the display to two line and
> ???
> 	delayms(5);	// Wait for LCD execute instruction
> 	write8(6);	// ???
> 	delayms(5);	// Wait for LCD execute instruction
> 	write8(1);	// Clear the LCD
> 	delayms(5);	// Wait for LCD execute instruction
> 	write8(0xf);	// ???
> 	delayms(5);	// Wait for LCD execute instruction
> 	return;
> }
> 
> -Adam
> 
> On 4/3/06, kravnus wolf <kravnus@yahoo.com> wrote:
> > I have written code for the LCD from bgmicro
> >
> >
>
http://www.bgmicro.com/prodinfo.asp?sid=0968912037037037604814310&prodid=LCD1022&page=1&cri=lcd&stype=3
> >
> > I managed to get it started and printing
> characters on
> > it. What grips me is that if I reset the PIC
> through
> > MCLR quickly and numerous times the LCD just
> prints
> > blank! It seems that the LCD cannot handle quick
> > restart over and over again. I am left
> > clueless........
> >
> > Thanks,
> > John
> >
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