Issac,
     I do get a blip on the scope but no more.
Thanks,
rich!

On 10/20/2015 7:54 AM, Isaac Marino Bavaresco wrote:
> Richard,
>
>
> In this PIC for the analog inputs to be off, you must write 0x06 or 0x07
> to ADCON1, not 0x00.
>
>
> Cheers,
>
> Isaac
>
>
> Em 20/10/2015 10:15, Richard R. Pope escreveu:
>> Issac,
>>       Nicola pointed this out and I changed CMCON from 0 to 7. There is
>> 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 t=
o
>>>> 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!
>>>>
--=20
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