I haven't been following this too closely but I don't see
ADCON0 set in there.

This is what I use:
      ADCON0 =3D 0;                              // adc off
      ADCON1 =3D 7;                              // all
digital
      CMCON =3D 7;                               //
Comparators off

Allen

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-
> bounces@mit.edu] On Behalf Of Richard R. Pope
> Sent: Tuesday, October 20, 2015 11:45 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: SV: SV: SV: SV: [PIC]: Trying to get a
16F877A to
> talk to an LCD!
>=20
> Jan-Erik,
>      There is no activity on either PORTA or D. The blip
that I see
> is
> probably just the pin burbbing on application of the
power. I
> know that
> the chip is running because the OSC is running.
>      Well I have reduced this to the absolute minimal
code. Here
> it is:
>              #pragma config FOSC =3D HS, #pragma config WDTE
=3D
> OFF,
> #pragma config PWRTE =3D OFF
>              #pragma config BOREN =3D OFF, #pragma config
LVP =3D
> ON,
> #pragma config CPD =3D OFF
>              #pragma config WRT =3D OFF, #pragma config CP =3D
OFF
>=20
>              ADCON1 =3D 7;
>              CMCON =3D 7;
>=20
>              PORTA =3D 0;
>              PORTD =3D 0;
>=20
>              TRISA =3D 0;
>              TRISD =3D 0;
>=20
>              en =3D 0;
>              Init:
>                  PORTA =3D 0;
>                  PORTD =3D 0;
>                  wait(5);
>                  PORTA =3D 1;
>                  NOP();
>                  NOP();
>                  NOP();
>                  PORTD =3D 1;
>                  NOP();
>                  NOP();
>                  NOP();
>                  wait(5);
>              goto Init;
> It doesn't get much simpler than that. There is a 8MHz
crystal
> hooked up
> to the OSC pins. It is running at 7.9997 MHz. The caps =3D
47pF.
> As per
> the data sheet the FOSC =3D HS. Almost everything else is
turned
> off. What
> do you think? Any ideas from anybody?
> Thanks,
> rich!
>=20
> On 10/20/2015 10:00 AM, Jan-Erik S=F6derholm wrote:
> > Exactly *what* was unclear from page 349 in the XC8
manual
> !?
> >
> > Your question make be believe that you never bothered to
> > check page 349 (or anything else in the manual, I
guess).
> >
> > Good luck.
> >
> >
> >
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
> =3D=3D=3D
> > Synopsis
> >   #include <xc.h>
> >   NOP();
> > Description
> >   Execute NOP instruction here. This is often useful to
fine
> tune delays or
> >   create a handle for breakpoints. The NOP instruction
is
> sometimes required
> >   during some sensitive sequences in hardware.
> >
> > Example
> > #include <xc.h>
> >   void crude_delay(unsigned char x) {
> >   while(x--){
> >    NOP(); /* Do nothing for 3 cycles */
> >    NOP();
> >    NOP();
> >   }
> > }
> >
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
> =3D=3D=3D
> >
> >
> > Jan-Erik.
> >
> >
> >
> --
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> archive
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