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[SOLVED] help with 16f506 not setting output hi..

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ghead

ghead

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Hi all I've written a volt meter program (in .asm) for use in my car using PIC16F506 (this is first time using '506)
when i run the following code CH0-1 of PORTB and PORTC don't latch at all. I've attached whole program as well as i'm not 100% on my layout.
Code ASM - [expand]
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MAIN    ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
    movlw 0xFF
    movwf PORTC
    movlw 0xFF
    movwf PORTB
    call  del_3       ;RC0-1 AND RB0-1 DON'T GO HI HERE?????
    call  del_3       ;ALL BUT RB2-3 SHOULD OUTPUT A HI........
    call  del_3
    call  del_3
    clrf PORTC
    clrf PORTB
SUB
    call  ADREAD
    call  CONADR
    call  CONDISP
    call  DISPLAY
    GOTO  SUB



Cheers for any help :)
 

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  • VOLT16F506.txt
    5.6 KB · Views: 97

is it possible that those i/os configured as analog/comparator input?
 
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    ghead

    ghead

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Yes!!!!! thank you, didn't read thoroughly enough so didn't realize about comparator set on by default :)
 

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