f326_blink.asm

来自「8051试验程序 基础教材」· 汇编 代码 · 共 65 行

;-----------------------------------------------------------------------------
;  Copyright (C) 2005 Silicon Laboratories, Inc.
;  All rights reserved.
;
;  FILE NAME   :  BLINK.ASM
;  DATE        :  20 APR 05
;  TARGET MCU  :  C8051F326
;  DESCRIPTION :  This program illustrates how to configure a port and
;                 write to a port I/O pin.
;
; 	NOTES:
;
;-----------------------------------------------------------------------------

#include "ioC8051F326.h"                  ; Include register definition file.

;-----------------------------------------------------------------------------
; EQUATES
;-----------------------------------------------------------------------------

GREEN_LED   equ   P2.2                    ; Green LED: '1' is ON	

;-----------------------------------------------------------------------------
; RESET and INTERRUPT VECTORS
;-----------------------------------------------------------------------------

            ; Reset Vector
            ASEGN CSEG01:CODE,0
            ljmp Main                     ; Locate a jump to the start of
                                          ; code at the reset vector.

;-----------------------------------------------------------------------------
; CODE SEGMENT
;-----------------------------------------------------------------------------


            RSEG BLINK:CODE                ; Switch to this code segment.

Main:
            ; Configure the Oscillator to 6 Mhz
            mov   OSCICN, #81h

            ; Configure the LED pin
            orl   P2MDOUT, #04h           ; make LED pin output push-pull

            ; Initialize LED to OFF
            clr   GREEN_LED

            ; Simple delay loop.
Loop2:      mov   R7, #03h			
Loop1:      mov   R6, #00h
Loop0:      mov   R5, #00h
            djnz  R5, $
            djnz  R6, Loop0
            djnz  R7, Loop1
            cpl   GREEN_LED               ; Toggle LED.
            jmp   Loop2

;-----------------------------------------------------------------------------
; End of file.

            END