利用proteus搭建電路
實現如下功能：
第一次按下K1鍵，輸出三角波
第二次按下K1鍵，輸出鋸齒波
第三次按下K1鍵，輸出方波
第四次按下K1鍵，輸出正弦波
第五次按下K1鍵，輸出-2.5V電平
源代碼：
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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