Code Problem?

[scottl]

Arch,

You are correct! I have changed this to ANSEL = 51 or ANSEL = %00110011. I have changed this but have the same problem! It only reads 32 over SEROUT2 no change.

If I rem out the ADCIN1 I get the correct value via ADCIN0 checked by multimeter. It only happens when I add ADCIN1. Does it look like the ADCON0 register?

Any other suggestions?

Thanks,

Scott

[Archilochus]

I've not used ADCIN much, but here's some other things to check:

I don't see anywhere in your code that sets the pins as inputs - you might try setting up the TRISIO register as needed.

In the PBP manual it shows an example like this:
"ADCIN 0, B0 ; Read channel 0 to B0"

The 'channel' is selected with a number rather than port pin name - don't know if that makes any difference or not.

Arch

[modifyit]

Here is another way of aproaching the A/D based on some code Melanie posted a long time ago, this uses direct access to the pics registers instead of using PBP's routines:

 Analog_In:
     ANSEL=%00110001
    ADCON0=%10000001;
        ' Enable ADC Module on pin AN0
    PauseUS 50;
        ' 50uS Pause to allow sampling Capacitor to charge
    ADCON0.1=1
    ' Start Conversion
    While ADCON0.1=1:Wend
    ' Wait for conversion to complete
    AnalogIn.Highbyte=ADRESH
    AnalogIn.Lowbyte=ADRESL
    ' Read 16-bit Result
RETURN

By changing ADCON0 to different values you should be able to read analog in on all the other analog pins