TLC549串行A/D转换器实验

;TLC549串行A/D转换器实验
;PIN1:REF+; PIN2:INPUT; PIN3:REF-; PIN4:GND
;;PIN5:CS;  PIN6:DATAOUT; PIN7:CLOCK; PIN8:+5V
CS      BIT P2.0
CLOCK   BIT P2.1
DATE    BIT P2.2
MEM     EQU 70H
HH      EQU 71H
MM      EQU 72H
LL      EQU 73H

ORG 0000H
AJMP STAR
ORG 0030H
TBB:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H
    DB 90H,88H,83H,0C6H,0A1H,86H,8EH
ORG 0050H
STAR:   
          SETB CS    ;CS
          CLR  CLOCK     ;CLOCK
          MOV R5,#00H
          ;##########################模数转换
          CLR  CS
          NOP
NXT:      SETB CLOCK
          NOP
          MOV C,DATE
          RRC A
          CLR CLOCK
          INC R5
          CJNE R5,#8,NXT
          MOV R5,#00H
          SETB CS
          MOV MEM,A  ;转换结果放于MEM
;######################16进制码转换成BCD码
          MOV B,#100
          DIV AB
          MOV HH,A   
          MOV A,B
          MOV B,#10
          DIV AB
          MOV MM,A
          MOV LL,B
;######################显示结果 
                  
          MOV R2,#100
ZH:       MOV A,HH
          MOV DPTR,#TBB
          MOVC A,@A+DPTR
          MOV P0,A
          MOV P1,#11111101B
          ACALL D1MS
          MOV A,MM
          MOV DPTR,#TBB
          MOVC A,@A+DPTR
          MOV P0,A
          MOV P1,#11111011B
          ACALL D1MS
          MOV A,LL
          MOV DPTR,#TBB
          MOVC A,@A+DPTR
          MOV P0,A
          MOV P1,#11110111B
          ACALL D1MS
          DJNZ R2,ZH
          AJMP STAR
;############################################      
D1MS:  MOV R7,#0AH
LOOP1: MOV R6,#32H
LOOP2: DJNZ R6,LOOP2
       DJNZ R7,LOOP1
       RET

END          

本文关键字：转换器  AVR单片机，单片机-工控设备 - AVR单片机