Nicola,
     It is stated in the original post. I appreciate the part about the=20
CMCON register. I changed it but still no go.
Thanks,
rich!

On 10/20/2015 8:57 AM, Nicola Perotto wrote:
> 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 (DS=
39582B)
> "Special function register summary" where you find the power on state of =
each
> 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.
>> 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
Richard R. Pope
President
Reedsburg Area Model Railroad Club, RAMRC
1230 19th Street #5
Reedsburg, WI 53959
608-768-7448
mechanic_2@charter.net

--=20
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