Mplab Source Code (Assembly) compiled but did not run in proteus

[khatus]

Hello guys this is the code for blink led in mplab ide using assembly language. But unfortunately, when i tried to simulate it in proteus it did not run
Here is my complete code

#include "p16f84a.inc"

; CONFIG
; __config 0x3FFF
 __CONFIG _FOSC_EXTRC & _WDTE_ON & _PWRTE_OFF & _CP_OFF
    
    
    RES_VECT  CODE    0x0000            ; processor reset vector
    GOTO    START                   ; go to beginning of program

; TODO ADD INTERRUPTS HERE IF USED

MAIN_PROG CODE                      ; let linker place main program


 
   STATUS equ 03h;
   TRISA  equ 85h;
   PORTA  equ 05h;
   COUNT1 equ 08h;
   COUNT2 equ 09h;
 ;****set up the ports****

   BSF STATUS, 5;
   MOVLW 00h;
   MOVWF TRISA;
   BCF STATUS,5;
   ;*****TURN the led on*********
START
   MOVLW 02h
   MOVWF PORTA;
  
LOOP1
   DECFSZ COUNT1,1;
   GOTO LOOP1;
   DECFSZ COUNT2,1;
   GOTO LOOP1;
;***Delay finished, now turn the led off***
   MOVLW 00h;
   MOVWF PORTA;
;***ADD another delay***
LOOP2
    DECFSZ COUNT1,1;
    GOTO LOOP2;
    DECFSZ COUNT2,1;
    GOTO LOOP2;
;****Get back to the start of the program;
    GOTO START;
    
 
  
                          
END

Here is the simulation result in mplab

And here is my proteus simulation result.

What is the problem??

 

[KlausST]

it did not run

.. is no error description.

Please tell us:
* What you expect it to do
* what you see instead

Klaus

 

[betwixt]

Without looking further, you have the oscillator configured for external RC operation but a crystal across the oscillator pins. It will never run in that configuration, either use an RC combination or change the oscillator setting in the configuration fuses.

Brian.

 

[andre_luis]

Proteus allow working either in Release or Debug mode, where the last one give you a lot of resources to investigate, such as breakpoints.

Anyway, are you attentive to manage registers bank before handling them ? I don't remember the syntax, but at a glance seems like not having been done, maybe unnecessary in your case.

 

[khatus]

Thanks, it is solved. Here is the updated code,

#include "p16f84a.inc"

; CONFIG
; __config 0xFFFD
 __CONFIG _FOSC_XT & _WDTE_ON & _PWRTE_OFF & _CP_OFF
    
    
    RES_VECT  CODE    0x0000            ; processor reset vector
    GOTO    START                   ; go to beginning of program

; TODO ADD INTERRUPTS HERE IF USED

MAIN_PROG CODE                      ; let linker place main program

START
 
   STATUS equ 03h;
   TRISA  equ 85h;
   PORTA  equ 05h;
   COUNT1 equ 08h;
   COUNT2 equ 09h;
 ;****set up the ports****

   BSF STATUS, 5;
   MOVLW 00h;
   MOVWF TRISA;
   BCF STATUS,5;
   ;*****TURN the led on*********
REPEAT
   MOVLW 02h
   MOVWF PORTA;
  
LOOP1
   DECFSZ COUNT1,1;
   GOTO LOOP1;
   DECFSZ COUNT2,1;
   GOTO LOOP1;
;***Delay finished, now turn the led off***
   MOVLW 00h;
   MOVWF PORTA;
;***ADD another delay***
LOOP2
    DECFSZ COUNT1,1;
    GOTO LOOP2;
    DECFSZ COUNT2,1;
    GOTO LOOP2;
;****Get back to the start of the program;
    GOTO REPEAT;
 
 END

--- Updated Aug 9, 2022 ---