I'm having a hell of a time getting the ADC working on the PIC16F88.
I'm currently trying the following...

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A 5V switch (toggle on/off switch) hooked up to AN0 (Pin 17)

LEDs hooked up to RB0-7

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I know Port B is working, because if I loop through numbers and output
it to port B, it displays correctly.  With ANSEL=3D0, if I just do
PORTB=3DPORTA, I can toggle the switch and RB0 turns on and off
appropriately.  So, it's getting proper digital input for PORTA, and can
output to PORTB properly.  Getting analog to work seems to be my
problem.

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So, this is my source...  I have overkill wait periods because I haven't
calculated out a proper WaitUS function yet, so it's just "long" for
now, where long is some period over 20 microseconds (T_ACQ).  I've tried
it both with and without the waits, in lots of different places.  It
doesn't do anything...  So, I'm rather baffled.  The ADC samples on the
piclist page are all for other chips and have other parameters, so it's
all very weird and there's not really much to work with here.  I'm sure
I'm just missing something/doing something stupid.

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Also, if I do ANSEL =3D 1, that doesn't work either.  So, for now I'm =
just
trying to have it ADC a digital value of 5V, which the user guide says
it should be able to do...

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void main() {

            ANSEL =3D 0;

            TRISA =3D 0xFF;  //Port A all inputs

            TRISB =3D 0x00;   //Port B all outputs

            PORTB =3D 0;

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            WaitUS(10000);

            ADCON1 =3D 0;

            WaitUS(10000);

            ADCON0 =3D 1;

            WaitUS(10000);

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            while (1)

            {

                        WaitUS(10000);

                        ADCON0 =3D 4;

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                        WaitUS(10000);

                        while (ADCON0 & 4)

                        { }

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                        WaitUS(10000);

                        PORTB =3D ADRESH;

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                        WaitUS(10000);

            }

}

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