http://home.iae.nl/users/pouweha/lcd/lcd.shtml

Has all the typical delay times associated with the LCD.... very helpful site.

Quoting Thomas N <thomasn101@HOTMAIL.COM>:

> Thank you all for trying to help me out.  I run the 2x16 LCD on 5V, what is
> the typical "wait time" for the LCD to be ready?  I am thinking of adding
> the delay route instead of polling the busy flag.
>
> Regards,
> Thomas
>
>
>
>
>
>
> >From: Jai Dhar <jdhar@ENGMAIL.UWATERLOO.CA>
> >Reply-To: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
> >To: PICLIST@MITVMA.MIT.EDU
> >Subject: Re: [PIC]: LCD routine Lockup
> >Date: Sat, 15 Mar 2003 16:15:30 -0500
> >
> >..or you could hard-code your delay times. I use a hitachi hd44780 based
> >LCD,
> >and I just hard code the delay's. Advantages: no continuous polling,
> >Disadvantages: Probably not as fast as it could be. Then again, printing
> >16x2
> >of lines in 30mS vs. 10mS makes no difference to my eyes :-)
> >
> >Quoting Daniel Imfeld <dimfeld@SOFTHOME.NET>:
> >
> > > The simplest way to do this would be to add a counter variable that you
> > > increment once every time you check the LCD module.  If the counter
> > > exceeds a certain value, then you assume something wrong with the LCD
> > > module and take appropriate action.  Just make sure that the value is
> > > high enough that you allow plenty of time for the LCD to finish if it is
> > > working correctly.  You might have to make it 16 bits, depending on
> > > clock speed and how long the LCD normally takes to write.
> > >
> > > Daniel Imfeld
> > >
> > >
> > > On Saturday, March 15, 2003 12:33 PM, Thomas N <thomasn101@HOTMAIL.COM>
> > > wrote:
> > >
> > > > Hi everyone,
> > > >
> > > > My LCD routine checks the busy flag of the LCD and make sure the LCD
> > > > is not busy before writing new data to it.  Therefore, if there is
> > > > something wrong with the LCD module, my system hangs because it keeps
> > > > checking and waiting for the LCD to be ready.  Is there a way around
> > > > this?  Thank you for your help!
> > > >
> > > > Regards,
> > > > Thomas
> > > >
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