Issac,
     Nicola pointed this out and I changed CMCON from 0 to 7. There is=20
still no activity on the en or r/s pins. Any more thoughts.
Thanks,
rich!

On 10/20/2015 7:05 AM, Isaac Marino Bavaresco wrote:
> Richard,
>
>
> Did you turn off the analog comparators?
> If not, do that with CMCON =3D 7;
>
> If the comparators are not disabled, RA0 through RA3 become analog and
> they are read always as '0'.
> That would create RMW problem if you change each bit individually,
> because this PIC doesn't have LAT register.
>
>
> Cheers,
>
> Isaac
>
>
> Em 20/10/2015 09:36, Richard R. Pope escreveu:
>> Issac,
>>       The problem is going to be in the configuration of the 16f877a.
>> There is no activity on the en or the r/s pins. Argh! I thought that
>> this might be the problem. The clock is running. I have every reason to
>> believe that the pins are not set for digital I/O. Here is the setup
>> 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 an=
d
>>> keep the image steady.
>>>
>>>
>>> Isaac
>>>
>>>
>>> Em 20/10/2015 07:31, Richard R. Pope escreveu:
>
--=20
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