blink.lst

aduc842原程序代码 ad公司芯片应用笔记

BLINK                                                                                                         PAGE 1

                       1    ;********************************************************************
                       2    ;
                       3    ; Author        : ADI - Apps            www.analog.com/MicroConverter
                       4    ;
                       5    ; Date          : October 2003
                       6    ;
                       7    ; File          : blink.asm
                       8    ;
                       9    ; Hardware      : ADuC842/ADuC843
                      10    ;
                      11    ; Description   : Blinks LED continuously.
                      12    ;                 200mSec period @ 50% duty cycle.
                      13    ;
                      14    ;********************************************************************
                      15    
                      16    $MOD842                         ; use 8052 predefined symbols
                      17    
  00B4                18    LED     EQU     P3.4            ; P3.4 is red LED on eval board
                      19    
                      20    ;____________________________________________________________________
                      21                                                           ; MAIN PROGRAM
----                  22    CSEG
                      23    
0000                  24    ORG  0000h
                      25    
0000 740A             26            MOV     A,#010
0002 B2B4             27    BLINK:  CPL     LED             ; flash (complement) the red LED
0004 120009           28            CALL    DELAY           ; call software delay
0007 80F9             29            JMP     BLINK           ; repeat indefinately
                      30    
                      31    ;____________________________________________________________________
                      32                                                            ; SUBROUTINES
0009                  33    DELAY:                                  ; Delays by ms 10* A
                      34                                            ; 10mSec based on 2.094MHZ 
                      35                                            ; Core Clock 
                      36                                            ; i.e. default ADuC842 Clock
                      37    
0009 F9               38                    MOV     R1,A            ; Acc holds delay variable (1 clock)
000A 7A1B             39     DLY0:          MOV     R2,#01Bh        ; Set up delay loop0 (2 clocks)
000C 7BFF             40     DLY1:          MOV     R3,#0FFh        ; Set up delay loop1 (2 clocks)
000E DBFE             41                    DJNZ    R3,$            ; Dec R3 & Jump here until R3 is 0 (3 clocks)
0010 DAFA             42                    DJNZ    R2,DLY1         ; Dec R2 & Jump DLY1 until R2 is 0 (3 clocks)
0012 D9F6             43                    DJNZ    R1,DLY0         ; Dec R1 & Jump DLY0 until R1 is 0 (3 clocks)
0014 22               44                    RET                     ; Return from subroutine
                      45    ;____________________________________________________________________
                      46    
                      47    END

VERSION 1.2h ASSEMBLY COMPLETE, 0 ERRORS FOUND
BLINK                                                                                                         PAGE 2

BLINK. . . . . . . . . . . . . .  C ADDR  0002H  
DELAY. . . . . . . . . . . . . .  C ADDR  0009H  
DLY0 . . . . . . . . . . . . . .  C ADDR  000AH  
DLY1 . . . . . . . . . . . . . .  C ADDR  000CH  
LED. . . . . . . . . . . . . . .    NUMB  00B4H  
P3 . . . . . . . . . . . . . . .  D ADDR  00B0H  PREDEFINED