Hello everyone,

I am trying to program a 16F84 and I am having some difficulties.

What I want to do is change the state of outputs portA and port B at the same time but I get errors when I assemble.

Can someone take a look and please help me out?

Thank you so much.

Sincerely,
Joey Hernandez.

Here is the program:



; ------------------
; CONFIGURATION FUSE
; ------------------
;
__CONFIG 0x3FFB

;
;
;
;
STATUS equ 0x03
RP0 equ 0x05
PORTA equ 0x05
PORTB equ 0x06
TRISA equ 0x85
TRISB equ 0x86
DelayA equ 0x0C
DelayB equ 0x0D
DelayC equ 0x0E
;
; START
;
;
org 0h ; startup address = 0000


movlw b'00000000'
movwf PORTA ; all PORTA pins = 1
movlw b'11111111'
movwf PORTB ; all PORTB pins = 0
bsf STATUS,RP0 ; set RP0 for RAM page 1
movlw b'00000000' ; all PortA = outputs
movwf TRISA
movlw b'11111111' ; all PortB = outputs
movwf TRISB
bcf STATUS,RP0 ; set RP0 for RAM page 0

MainLoop movlw b'00000001'
movwf PORTA
call Delay500

movlw b'11111110'
movwf PORTB
call Delay500

movlw b'00000010'
movwf PORTA
call Delay500

movlw b'10111101'
movwf PORTB
call Delay500

goto MainLoop ; do this loop forever
end


; --------------------------------
; SUBROUTINE: waste time for 500mS
; --------------------------------
;
Delay500 clrf DelayA ; clear DelayA to 0
clrf DelayB ; clear DelayB to 0
movlw 3h ; set DelayC to 3
movwf DelayC
Wait1 decfsz DelayA ; subtract 1 from DelayA
goto Wait1 ; if not 0, goto Wait1
decfsz DelayB ; subtract 1 from DelayB
goto Wait1 ; if not 0, goto Wait1
decfsz DelayC ; subtract 1 from DelayC
goto Wait1 ; if not 0, goto Wait1
return ; finished the delay

end

THESE ARE THE ERROR MESSAGES:

Message[302] C:\3081\GFD.TXT 34 : Register in operand not in bank 0. Ensure that bank bits are correct.
Message[302] C:\3081\GFD.TXT 36 : Register in operand not in bank 0. Ensure that bank bits are correct.
Error[113] C:\3081\GFD.TXT 41 : Symbol not previously defined (Delay500)
Error[113] C:\3081\GFD.TXT 45 : Symbol not previously defined (Delay500)
Error[113] C:\3081\GFD.TXT 49 : Symbol not previously defined (Delay500)
Error[113] C:\3081\GFD.TXT 53 : Symbol not previously defined (Delay500)

 

Even though the program looks wrong because of the spacings, the spacings where correct the got repositioned when I copied and pasted it to the Electro Tech message body.

Joey Hernandez

 

Be careful where you place the END statement. All statements are ignored after that.