Hi,

I've done all this now, and in the debug/watch thingo in MPLAB it shows
PORTA changing from high to low, etc. However, when I  program the chip it
doens't work. I know i have my connections right, as i've tested with
another program that does the same thing but is coded in Jal. The problem is
i can't understand the asm that comes out of the jal compiler so i can't see
where i've gone wrong.

Thanks


--------Revised Code:

;Setup
 list P=16F877
 include "c:\P16F877.inc"
 errorlevel -302
 __CONFIG _CP_OFF & _XT_OSC & _WDT_OFF & _PWRTE_OFF & _BODEN_OFF & _LVP_OFF
;Declarations
CounterA equ 20h
CounterB equ 21h
CounterC equ 22h
 org 0
 goto  Start

Bank1 Macro
 bsf STATUS,RP0
 bcf STATUS,RP1
 bcf STATUS,IRP
 Endm

Bank0 Macro
 bcf STATUS,RP0
 bcf STATUS,RP1
 bcf STATUS,IRP
 Endm

Init clrf PORTA
 Bank1
   movlw b'00001111'          ;move into adcon1
    movwf ADCON1
 movlw b'11110000' ;0,1,2,3 of porta are output
 movwf TRISA
 Bank0 ;bank 0
 clrf ADCON0
 movlw b'00000000' ;all porta low
 movwf PORTA
 retlw 0


;PIC Time Delay = 1.0000006 s with Osc = 20.000000 MHz
Delay movlw D'26'
 movwf CounterC
 movlw D'119'
 movwf CounterB
 movlw D'85'
 movwf CounterA
 goto Delay_0
 retlw 0
Delay_0 decfsz CounterA,1
 goto Delay_0
 decfsz CounterB,1
 goto Delay_0
 decfsz CounterC,1
 goto Delay_0
 retlw 0

Start call Init
Main movlw b'00000001'
 movwf PORTA
 call Delay
 movlw b'00000010'
 movwf PORTA
 call Delay
 movlw b'00000100'
 movwf PORTA
 call Delay
 movlw b'00001000'
 movwf PORTA
 call Delay
 goto Main
 End


----- Original Message -----
From: "Jinx" <joecolquitt@CLEAR.NET.NZ>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, November 29, 2002 8:09 PM
Subject: Re: [PIC]: First ASM problems


> >    movlw 0x07           ;assuming all digital
> >    movwf cmcon
>
> Sorry, that should be (still in bank1)
>
>          movlw   b'00000111'  ;set Port I/O configuration
>          movwf   adcon1
>
>          bank0
>          clrf         adcon0          ;or at least clr bit0  (ADON)
>
> Deeply ensconced in F628s at the moment and cmcon is a
> similar PortA register
>
> --
> http://www.piclist.com hint: The list server can filter out subtopics
> (like ads or off topics) for you. See http://www.piclist.com/#topics
>

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