Stephen and David,
     I am installing LEDs right now. Then I will increase the delays so=20
that I can observe the sequence of events.
     Here are the numbers that I am sending to initialize the display:
                                                             0x00 and=20
three 0x30 with 30 ms in between each one.
                                                             0x38 Set to=20
8 bit, 2 line, 5x8 with 15 ms of delay
                                                             0x06 Set=20
Increment, No display shift with 5 ms
                                                             0x0F Set to=20
display on, cursor on, cursor is blinking 5ms
                                                             0x1C Set to=20
display on, cursor on, cursor is blinking 5ms
     And then I do a LCD_Clear(); This is exactly what I used with the=20
16f84a and it worked fine. Hum!! ??
Thanks,
rich!

On 10/22/2015 11:37 PM, stephen.forrest@agilent.com wrote:
> Hi Richard-
> Have you checked the Rs signal is actually changing _at_ the display? (Lo=
ooooong delays - David has just beat me ;o)  )
>
> Also, can you post the exact sequence of commands for lcd_initialise(i)? =
There should be a sequence of command writes. What are the actual values wr=
itten (if the values are defined elsewhere what are the real numbers)? Part=
icularly the "function set" command. From your comments, it seems that you =
are expecting to use 8 bit data to the display. Are you sure the display is=
 set 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 16f877=
a
>
> David,
>       I added delays and I insured that the rs and rw lines were set corr=
ectly. 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
>> is really not going high or you need a small delay (20uS for example)
>> after changing LCD_rs.  Add the delay to both the data and command routi=
nes.
>> David...
>>
--=20
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