Hi Richard-=20
Have you checked the Rs signal is actually changing _at_ the display? (Looo=
ooong delays - David has just beat me ;o)  )

Also, can you post the exact sequence of commands for lcd_initialise(i)? Th=
ere should be a sequence of command writes. What are the actual values writ=
ten (if the values are defined elsewhere what are the real numbers)? Partic=
ularly the "function set" command. From your comments, it seems that you ar=
e expecting to use 8 bit data to the display. Are you sure the display is s=
et for this and not 4 bit data, which is very common to save pins?

Keep digging!

Stephen

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 Richard R. Pope
Sent: Friday, 23 October 2015 2:21 PM
To: Microcontroller discussion list - Public.
Subject: Re: [PIC]: Trying to get a 18f4550 to talk to an LCD! Was 16f877a

David,
     I added delays and I insured that the rs and rw lines were set correct=
ly. Still no good. I just don't know.
Thanks,
rich!

On 10/22/2015 9:54 PM, David Duffy (AVD) wrote:
> If the commands work but the data doesn't, I would guess that LCD_rs=20
> is really not going high or you need a small delay (20uS for example)=20
> after changing LCD_rs.  Add the delay to both the data and command routin=
es.
> David...
>

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