ADCIN setup help need

[Peaps]

Hi, I have just browsed through the datasheet, and if I were doing it, I would set the following registers:

INTCON.7 = 0 'Disable interrupts
TRISC.1 = 1 'Set PORTC.1 to be an input
CM1CON0.7 = 0 'Disable Comparator module
CM2CON0.7 = 0 'Disable Comparator module
VRCON = 0 'Disable Voltage Reference module
ADCON0.7 = 0 'Right justify result. Assumes 10 bit AD conversion
ADCON0.0 = 1 'Enable ADC module
ANSEL.5 = 1 'Set high impedance buffer on ANS5 (PORTC.1)


Andy

[dangill]

Thanks Andy,

While I was waiting for someone to reply, I broused the site and found what I was doing wrong. I always use all the stuff you said, but when I was using the ADCIN command, I was trying to read the port# not the AD channel number. Once I changed from the port# over to the channel number, everything worked perfectly. By the way, can anyone tell me why the ADCIN was working using the portA.0 address and not the channel # all the other times I used ADCIN. Just curious...PortA.0 is the only port that works this way. No other port does it. I can't find out why anywhere.

Thanks,

Dan

[Peaps]

Hi Dan,

It may have been because PORTA.0 was currently at logic low, or as far as PBP is concerned, 0.

Effectively, you were writing:

ADCIN 0, Var

Which would have read from PORTA.0 anyway...

You could do the same to PORTA.1 if you pulled it high.

Andy