数控电压源.asm

项目名称：数控电压源,包括资源:C语言源程序

ORG 0000H
AJMP MAIN
ORG 0030H
MAIN: MOV DPTR,#7FFFH   ;置DAC0832入口地址
      MOV R0,#00H       ;置初时值
SAO:  JNB P1.0,JIA
      JNB P1.1,JIAN
      AJMP SAO
JIA:  INC R0
      MOV A,R0
      CJNE A,#00H,SONG
      MOV R0,#0FFH
      MOV A,R0
      AJMP SONG
JIAN: DEC R0
      MOV A,R0
      CJNE A,#0FFH,SONG
      MOV R0,#00H
      MOV A,R0
SONG: MOVX @DPTR,A
LOP:  MOV A,P1
      CJNE A,#0FFH,LOP
      AJMP SAO
      END