Some input pins not working? - Electronic Circuits Projects Diagrams Free

Thorpydo · 13th August 2004, 06:35 PM

Hey,
I have 4 input pins, pin0-pin3. The physical circuit is setup the same way for each pin but I can't use them interchangeably. Pins 2 and 3 work fine; 0 and 1 don't. I believe it's because the comparator could be set? Or something like that? I've looked through the datasheet but everything looks disabled. The only initilization I have is as follows:

Quote:

bsf STATUS, RP0 ;changes banks
movlw b'00001111' ;0-4inputs 5,6outputs
movwf TRISIO ;setting input/output (1=input)
bcf STATUS, RP0 ;changes banks

movlw b'00000000' ;
movwf GPIO ;setting high/low (1=high)

Thanks

Exo · 13th August 2004, 06:43 PM

Yes, they're the comparator pins.

Add the following lines of code to the top of your program

BANKSEL CMCON
MOVLW .7
MOVWF CMCON

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13th August 2004, 06:43 PM	(permalink)
Exo	Yes, they're the comparator pins. Add the following lines of code to the top of your program BANKSEL CMCON MOVLW .7 MOVWF CMCON