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1、ORG0000HAJMPSTARTORG0050HSTART:MOVDPTR,#0FEFFHLP:MOVA,#00HLP1:MOVX@DPTR,AINCAMOVDPTR,#0FEFFHTRI:MOVA,#00HUP:MOVX@DPTR,AINCACJNEA,#0FFH,UPDOWN:MOVX@DPTR,ADECACJNEA,#00H,DOWN??????MOV?DPTR,#SINTAB????????;正弦表寫入內(nèi)部RAM6DH-7FH??????MOV?R0,#6DHLOOP:?CLR?A??????MOVCA,@A+DPTR??????MOV?@
2、R0,A??????INC?DPTR??????INC?R0??????CJNER0,#80H,LOOP??????MOV?DPTR,#7FFFH?????????;設置D/A轉(zhuǎn)換器的端口地址??????MOV?R0,#6DH??????????????;設置正弦表指針LOOP1:MOV?A,@R0???????????????;查表??????MOVX@DPTR,A?????????????;D/A轉(zhuǎn)換??????ACALL?DELAY?????????????;延時，等待轉(zhuǎn)換結(jié)束??????DEC?R0????????????????????;正
3、弦表位移量增量??????CJNER0,#6DH,LOOP1?????????;第一象限輸出完？LOOP2:MOV?A,@R0???????????????;查表??????MOVX@DPTR,A?????????????;D/A轉(zhuǎn)換??????acall?DELAY????????????;延時，等待轉(zhuǎn)換結(jié)束??????DEC?R0????????????????????;正弦表位移量減量??????CJNER0,#6DH,LOOP2?????????;第二象限輸出完？LOOP3:MOV?A,@R0???????????????;查表??????C
4、PLA???????????????????????;表值取反??????MOVX@DPTR,A?????????????;D/A轉(zhuǎn)換??????ACALL?DELAY????????????;延時，等待轉(zhuǎn)換結(jié)束??????INC?R0????????????????????;正弦表位移量增量?????CJNER0,#7FH,LOOP3?????????;第三象限輸出完？LOOP4:MOV?A,@R0???????????????;查表?????CPL?A?????????????????????;表值取反?????MOVX@DPTR,A??????
5、???????;D/A轉(zhuǎn)換?????ACALL?DELAY????????????;延時，等待轉(zhuǎn)換結(jié)束?????DEC?R0????????????????????;正弦表位移量減量?????CJNER0,#6DH,LOOP4?????????;第四象限輸出完？?????SJMPLOOP1DELAY:MOV?R7,#200??????????????;延時50msDEL1:MOVR6,#123?????NOPDEL2：JNZR6,DEL2?????DJNZR7,DEL1?????LJMPSTARTSINTAB:DB80H,83H,86H,89H,8D
6、H,90H,93H,96HDB99H,9CH,9FH,0A2H,0A5H,0A8H,0ABH,0AEHDB0B1H,0B4H,0B7H,0BAH,0BCH,0BFH,0C2H,0C5HDB0C7H,0CAH,0CCH,0CFH,0D1H,0D4H,0D6H,0D8HDB0DAH,0DDH,0DFH,0E1H,0E3H,0E5H,0E7H,0E9HDB0EAH,0ECH,0EEH,0EFH,0F1H,0F2H,0F4H,0F5HDB0F6H,0F7H,0F8H,0F9H,0FAH,0FBH,0FCH,0FDHDB0FDH,0FEH,0FFH,0FFH,
7、0FFH,0FFH,0FFH,0FFHDB0FFH,0FFH,0FFH,0FFH,0FFH,0FFH,0FEH,0FDHDB0FDH,0FCH,0FBH,0FAH,0F9H,0F8H,0F7H,0F6HDB0F5H,0F4H,0F2H,0F1H,0EFH,0EEH,0ECH,0EAHDB0E9H,0E7H,0E5H,0E3H,0E1H,0DEH,0DDH,0DAHDB0D8H,0D6H,0D4H,0D1H,0CFH,0CCH,0CAH,0C7HDB0C5H,0C2H,0BFH,0BCH,0BAH,0B7H,0B4H,0B1HDB0AEH,0ABH,0
8、A8H,0A5H,0A2H,9FH,9CH,99HDB96H,93H,90H,8DH,89H,86H,83H
