Sheeraz Khan
Member level 3
12c508a
Hi
This code is for 12C508A what is the process to convert this code for 16F84A
SK
Hi
This code is for 12C508A what is the process to convert this code for 16F84A
SK
Code:
;**********************************************************************
; This file is a basic code template for assembly code generation *
; on the PICmicro PIC12C508A. This file contains the basic code *
; building blocks to build upon. *
; *
; If the internal RC oscillator is not implemented then the first *
; instruction after the ORG 0x000 directive is not required. *
; *
; Refer to the MPASM User's Guide for additional information on *
; features of the assembler (Document DS33014). *
; *
; Refer to the respective PICmicro data sheet for additional *
; information on the instruction set. *
; *
; Template file assembled with MPLAB V3.99.18 and MPASM V2.15.06. *
; *
;**********************************************************************
; *
; Filename: xxx.asm *
; Date: *
; File Version: *
; *
; Author: *
; Company: *
; *
; *
;**********************************************************************
; *
; Files required: *
; *
; *
; *
;**********************************************************************
; *
; Notes: *
; *
; *
; *
; *
;**********************************************************************
list p=12c508a ; list directive to define processor
#include <p12c508a.inc> ; processor specific variable definitions
__CONFIG _CP_ON & _WDT_OFF & _MCLRE_ON & _LP_OSC ;external /MCLR, no wdt, 32kHz oscillator
; '__CONFIG' directive is used to embed configuration word within .asm file.
; The lables following the directive are located in the respective .inc file.
; See respective data sheet for additional information on configuration word.
#define SEC_OUT GPIO,0 ;
#define _SEC_OUT GPIO,1 ;
#define MIN_OUT GPIO,2 ;
;***** CONSTANT DEFINITIONS
OPTION_CFG EQU B'11000100' ;option register configuration: no pullups, no wakeup, internal TMR0 1:16
PORT_CFG EQU 0x00 ;port configuration, all outputs
PORT_INI EQU B'00000010' ;port initialization value, SEC_OUT low, /SEC_OUT high, MIN_OUT low
CONST_03 EQU D'77' ;constant used to generate 0.3sec delays
;***** VARIABLE DEFINITIONS
MIN EQU 0x07 ;temporary storage, counter 60 seconds
;**********************************************************************
ORG 0x1FF ; processor reset vector
; Internal RC calibration value is placed at location 0x1FF by Microchip
; as a movlw k, where the k is a literal value.
ORG 0x000 ; coding begins here
goto Main ;jump to beginning of code
ORG 0x008 ;save these locations for code changes
Main: movlw OPTION_CFG ;setup option reg
option ;
movlw PORT_INI ;initialize port
movwf GPIO ;
movlw PORT_CFG ;configure port pins
tris GPIO ;
movlw 0x01 ;initialize timer
movwf TMR0 ;
movlw D'60' ;initialize counter
movwf MIN ;
Wait_0: movf TMR0,W ;read timer
btfss STATUS,Z ;check if it rolled over
goto Wait_0 ;if not, wait
bcf MIN_OUT ;clear minute output
bsf SEC_OUT ;set SEC_OUT output
bcf _SEC_OUT ;clear the /SEC_OUT
decfsz MIN,F ;decrement minute counter
goto Wait_03 ;if not zero, go generate 0.3sec pulse
movlw D'60' ;reload counter
movwf MIN ;
bsf MIN_OUT ;set minute output
Wait_03: movlw CONST_03 ;wait here for 0.3s
subwf TMR0,W ;
btfss STATUS,C ;
goto Wait_03 ;
bcf SEC_OUT ;clear seconds output
bsf _SEC_OUT ;set complementary output
goto Wait_0 ;go back wait in the loop
;-----------------------------------------------------------------------
END ; directive 'end of program'
