Richard,
you forget to say which are the pin used! (This is VERY important for us to=
 help
you)

In this case, for the initialization, I read the table 2.1 at page 19 (DS39=
582B)
"Special function register summary" where you find the power on state of ea=
ch
register.
>From the table you see that the CMCON register value if 0x07 -> OFF
but you wrote 0x00 -> Reset -> uses RA0 to RA3 as input!
Paragraph 12.1 Comparator configuration.
          N


On 20/10/2015 11:36, Richard R. Pope wrote:
> Issac,
>      The problem is going to be in the configuration of the 16f877a.=20
> There is no activity on the en or the r/s pins. Argh! I thought that=20
> this might be the problem. The clock is running. I have every reason to=20
> believe that the pins are not set for digital I/O. Here is the setup=20
> statements:
>          TRISD =3D 0;
>          TRISA =3D 0;
>          ADCON0 =3D 0;
>          ADCON1 =3D 0;
>          CMCON =3D 0;
> Any more thoughts on this?
> Thanks,
> rich!
>
> On 10/20/2015 6:04 AM, Isaac Marino Bavaresco wrote:
>> Richard,
>>
>>
>> You could create an infinite loop sending just one and the same command
>> to the LCD, then your scope would synch with, say, the ENABLE signal and
>> keep the image steady.
>>
>>
>> Isaac
>>
>>
>> Em 20/10/2015 07:31, Richard R. Pope escreveu:

--=20

*Nicola Perotto
Sistemi Informatici ed Elettronici
skype: nicolap
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fax: +39 0439 633 1191*

--=20
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