adcldr.lst

aduc842原程序代码 ad公司芯片应用笔记

ADCLDR                                                                                                        PAGE 1

                       1    ;********************************************************************
                       2    ;
                       3    ; Author        : ADI - Apps            www.analog.com/MicroConverter
                       4    ;
                       5    ; Date          : October 2003
                       6    ;
                       7    ; File          : ADCldr.asm
                       8    ;
                       9    ; Hardware      : ADuC842/ADuC843
                      10    ;
                      11    ; Description   : Performs repeated single ADC conversions on ADC0
                      12    ;                 Adjusts output of DAC0 to vary with LDR 
                      13    ;                 
                      14    ;********************************************************************
                      15    
                      16    $MOD842                         ; Use 8052&ADuC842 predefined symbols
                      17    
  0003                18    CHAN    EQU     3               ; convert this ADC input channel..
                      19                                    ; ..chan values can be 0 thru 8
                      20    ;____________________________________________________________________
                      21                                                      ; BEGINNING OF CODE
----                  22    CSEG
                      23    
0000                  24    ORG 0000h
                      25    
0000 02004B           26            JMP     MAIN            ; jump to main program
                      27    ;____________________________________________________________________
                      28                                                 ; INTERRUPT VECTOR SPACE
                      29            
                      30    
                      31    ;====================================================================
                      32                                                           ; MAIN PROGRAM
004B                  33    ORG 004Bh
                      34    
004B                  35    MAIN:
                      36    
                      37    ; PRECONFIGURE...
                      38    
004B 75EFAC           39            MOV     ADCCON1,#0ACh   ; power up ADC
004E 75D803           40            MOV     ADCCON2,#CHAN   ; select channel to convert
0051 75FD3D           41            MOV     DACCON,#03DH    ; Dac 0  0-5V 12bits
                      42    
                      43    ; PERFORM REPEATED SINGLE CONVERSIONS...
                      44    
0054 7401             45    AGAIN:  MOV     A,#01H          ; Delay length
0056 D2DC             46            SETB    SCONV           ; innitiate single ADC conversion
                      47                                    ; ADC ISR is called upon completion
0058 30DFFD           48            JNB     ADCI,$
005B C2DF             49            CLR     ADCI
005D 85DAFA           50            MOV     DAC0H,ADCDATAH
0060 85D9F9           51            MOV     DAC0L,ADCDATAL
                      52            
0063 80EF             53            JMP     AGAIN   
                      54            
                      55    ;____________________________________________________________________
                      56    END

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

ADCCON1. . . . . . . . . . . . .  D ADDR  00EFH  PREDEFINED  
ADCCON2. . . . . . . . . . . . .  D ADDR  00D8H  PREDEFINED  
ADCDATAH . . . . . . . . . . . .  D ADDR  00DAH  PREDEFINED  
ADCDATAL . . . . . . . . . . . .  D ADDR  00D9H  PREDEFINED  
ADCI . . . . . . . . . . . . . .  B ADDR  00DFH  PREDEFINED  
AGAIN. . . . . . . . . . . . . .  C ADDR  0054H  
CHAN . . . . . . . . . . . . . .    NUMB  0003H  
DAC0H. . . . . . . . . . . . . .  D ADDR  00FAH  PREDEFINED  
DAC0L. . . . . . . . . . . . . .  D ADDR  00F9H  PREDEFINED  
DACCON . . . . . . . . . . . . .  D ADDR  00FDH  PREDEFINED  
MAIN . . . . . . . . . . . . . .  C ADDR  004BH  
SCONV. . . . . . . . . . . . . .  B ADDR  00DCH  PREDEFINED