Hi Richard,

I'm sure you've checked all the outputs are working and properly
connected.  I usually set a square wave on each pin, one at the time, and
check the display and of the signal.
Could this be a timing issue? Leave a significant delay (100ms+) at startup
and some delay (20ms extra or so) after each command issued to the display.

Good luck,
Joep

2015-10-20 10:08 GMT+02:00 Ray Haddad <ray@perthmagic.com>:

> On 20 Oct 2015 at 2:43, Richard R. Pope wrote:
> > Hello all,
> >      I am trying to get a 16f877a to talk to a
> > NHD-0216BZ-FL-YBW lcd.
> > PortD is connected to the data lines and RA0, RA1, and RA2 are the
> > control lines. They are R/S, R/W, and EN in that order. I have
> > checked
> > power, ground, and the clock. These are all ok. I also checked the
> > frequency and it is 7.99997 MHz with a 8.0 MHz crystal. The LCD is
> > not
> > initializing. It never goes in to 2 line mode. There is also no
> > cursor.
> > I am using MpLabX and the XC8 compiler. I am using a PICKit2 for my
> > programmer. I have spent several hours trying to sort this out and I
> > am
> > stumped. Could I please get some help? Should I post the source code
> > here?
> > Thanks,
> > Richard R. Pope
> > President
> > Reedsburg Area Model Railroad Club, RAMRC
> > 1230 19th Street #5
> > Reedsburg, WI 53959
> > 608-768-7448
> > mechanic_2@charter.net
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
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>
>
> Richard,
>
> Be sure all analog registers are set to turn off
> analog functions on the pins you are using for
> control. Since each chip varies you will have tor
> efer to the spec sheet. Do a search in your PDF
> reader for analog and note the registers involved
> like ADCON, etc. Read the list of bit controls and
> set them to ensure they are off.
>
> If you don't do that, you cannot guarantee the state
> of the pins even if you have sent them as outputs.
>
> Best,
> Ray
>
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