16F88 Comparator Problem

[Guest]

Has anyone experienced a problem reading C1OUT from CMCON on a 16F88? I can see C1OUT on RA3 but I cannot read it in code.

#include <16F88.h>
#fuses HS,NOWDT,NOPROTECT,NOBROWNOUT,NOMCLR
#use delay(clock=20000000)
#Use FAST_IO(A)
#Use FAST_IO(B)

#BYTE VRCONREG = 0x9D
#BYTE CMCON = 0x9C


main() {
int8 Comp;
SET_TRIS_A(0x03);
SET_TRIS_B(0x04);
OUTPUT_HIGH(PIN_B1);
DELAY_MS(1000);
OUTPUT_LOW(PIN_B1);

VRCONREG=0xE2;

CMCON = 6;
while(TRUE)
{ Comp=CMCON;
if(BIT_TEST(Comp,6)){
Delay_us(100);
if(BIT_TEST(Comp,6))
OUTPUT_HIGH(PIN_B3);}
if(!BIT_TEST(Comp,6)){
Delay_us(100);
if(!BIT_TEST(Comp,6))
OUTPUT_LOW(PIN_B3);}
}
}

[PCM programmer]

It looks like you're trying to use the internal Vref with the comparators
in mode 6. However, according to the data sheet, the internal Vref is
only used in mode 2. I can confirm this. I ran the following test
program and it only worked in mode 2.

I used a 16F88 on a PicDem2-Plus board, and I set the trimpot for
an output voltage of 2.5v. When I ran the program below, and
moved the trimpot wheel back and forth very slightly, I got this output: