基于51单片机+DAC0832的波形发生器汇编语言程序

ID:939809 · 发表于 2021-6-18 10:31

利用proteus搭建电路

实现如下功能：
第一次按下K1键，输出三角波
第二次按下K1键，输出锯齿波
第三次按下K1键，输出方波
第四次按下K1键，输出正弦波

第五次按下K1键，输出-2.5V电平

源代码：
      ORG 0000H
               LJMP MAIN
               ORG 0003H
               LJMP EX0P
               ORG 0100H
MAIN: MOV SP,#60H
      MOV R2,#0
               SETB IT0
               SETB EX0
               SETB EA
LP0:    CJNE R2,#0,LP1
      ACALL  LINE
LP1:    CJNE R2,#1,LP2
      ACALL  TRI
LP2:    CJNE R2,#2,LP3
               ACALL  SAWTOOTH
LP3:    CJNE R2,#3,LP4
      ACALL  SQUARE
LP4:    CJNE R2,#4,LP5
      ACALL  SINE
LP5:    JMP LP0

EX0P: INC R2
      CJNE R2,#5,RETU
               MOV R2,#0
RETU: RETI

LINE: MOV A,#80H
      MOV DPTR,#7F00H
               MOVX @DPTR,A
               RET

TRI:    MOV A,#00H
      MOV DPTR,#7F00H
UP:    MOVX @DPTR,A
      ACALL  DELAY
               INC A
               JNZ UP
               MOV A,#0FEH
DOWN: MOVX @DPTR,A
      ACALL  DELAY
               DEC A
               JNZ DOWN
               RET

SAWTOOTH:CLR A
      MOV DPTR,#7F00H
NEXTS: MOVX @DPTR,A
      ACALL  DELAY
               INC A
               JNZ NEXTS
               RET

SQUARE:  MOV A,#0FFH
LPSQU: MOV DPTR,#7F00H
      MOVX @DPTR,A
               ACALL  DELAY
               CPL A
               MOVX @DPTR,A
               ACALL  DELAY
               RET

SINE: MOV R6,#255
      MOV DPTR,#7F00H
               CLR A
               MOV B,A
NEXTSINE:
      MOVC A,@A+PC
               MOVX @DPTR,A
               ACALL  DELAY
               INC B
               MOV A,B
               DJNZ R6,NEXTSINE
               RET

DELAY: MOV R7,#150
DL:    DJNZ R7,DL
      RET

SINEDAT: DB 80H,83H,86H,89H,8cH,8fH,92H,95H,98H,9cH,9fH,0a2H,0a5H,0a8H,0abH,0aeH
      DB 0b0H,0b3H,0b6H,0b9H,0bcH,0bfH,0c1H,0c4H,0c7H,0c9H,0CCH,0ceH,0d1H,0d3H,0d5H,0d8H
      DB 0daH,0dcH,0deH,0e0H,0e2H,0e4H,0e6H,0e8H,0eaH,0ecH,0edH,0efH,0f0H,0f2H,0f3H,0f4H
      DB 0f6H,0f7H,0f8H,0f9H,0faH,0fbH,0fcH,0fcH,0fdH,0feH,0feH,0ffH,0ffH,0ffH,0ffH,0ffH

      DB 0ffH,0ffH,0ffH,0feH,0feH,0fdH,0fcH,0fcH,0fbH,0faH,0f9H,0f7H,0f6H,0f5H,0f3H,0f2H
               DB 0f0H,0efH,0edH,0eBH,0E9H,0E7H,0E5H,0E3H,0E1H,0DFH,0DCH,0DAH,0D8H,0D5H,0D3H,0D1H
               DB 0CEH,0CCH,0c9H,0c7H,0c4H,0c1H,0bfH,0bcH,0b9H,0b6H,0b3H,0b0H,0aeH,0abH,0a8H,0a5H
               DB 0a3H,0A1H,09EH,09cH,098H,095H,092H,08fH,08cH,089H,087H,085H,083H,081H,080H,080H

               DB 080H,080H,07FH,07EH,07BH,078H,075H,072H,06fH,06cH,069H,066H,063H,060H,05dH,05aH
               DB 057H,054H,051H,04EH,04bH,048H,046H,043H,040H,03dH,03bH,038H,035H,033H,030H,02eH
               DB 02cH,029H,027H,025H,023H,020H,01EH,01CH,01AH,018H,017H,015H,013H,012H,010H,00EH
               DB 00DH,00CH,00CH,0AH,009H,008H,007H,006H,005H,004H,003H,002H,001H,001H,000H,000H

               DB 000H,000H,000H,000H,001H,001H,002H,003H,003H,004H,005H,006H,007H,008H,009H,00aH
               DB 00CH,00dH,00eH,010H,012H,013H,015H,017H,018H,01aH,01CH,01eH,020H,023H,025H,027H
               DB 029H,02cH,02eH,030H,033H,035H,038H,03bH,03dH,040H,043H,046H,048H,04bH,04eH,051H
               DB 054H,057H,05aH,05dH,060H,063H,066H,069H,06cH,06fH,072H,075H,078H,07BH,07EH,080H
               END

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基于51单片机+DAC0832的波形发生器汇编语言程序

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