Hello!

I testing this routine for decode a dtmf signal. It was funny because when
I used the simulator all works properly, but in the real world didn't work.

Any idea.

TIA.

Gustavo
---------
list p=16c55
;
f0     equ 0
rtcc   equ 1
pc     equ 2
status equ 3
fsr    equ 4
porta  equ 5
portb  equ 6
portc  equ 7
reg1   equ 0B
reg2   equ 0C
reg3   equ 0D
aux    equ 0E
acu    equ 0F
;
        org    0
        goto   inicio
;
inicio movlw b'0011'
       tris  porta
       movlw .64
       tris  portb
;
       movlw b'11111111'
       tris  portc
;
       bcf   status,6
       bcf   status,7
;
       movlw .177
       movwf portb
       nop
       movlw .12
       movwf porta
       nop
;
rst    movlw .0
       movwf acu
       movwf aux

;
;
d_str  btfsc porta,1
       goto  d_str
       nop
       btfss portc,7
       goto  d_str
;
delay  movlw .80
       movwf reg1
tres   movlw .64
       movwf reg2
dos    movlw .48
       movwf reg3
       nop
       nop
       nop
uno    btfsc portc,3
       goto  cmd_3
       nop
       nop
       decfsz reg3
       goto   uno
       decfsz reg2
       goto   dos
       decfsz reg1
       goto   tres
       goto   rst
;

cmd_3  nop
       nop
       nop
       bcf portb,0
       nop
       nop
;
       end