51单片机汇编秒表程序.docx

ORG 0000HLJMP MAINORG 0003H LJMP INT_0 ORG 000BH LJMP T0_INT ORG 0013H LJMP INT_1 ORG 001BH LJMP T1_INTMAIN: MOV TMOD,#11HMOV TH1,#0D8HMOV TL1,#0F0HMOV TH0,#3CHMOV TL0,#0B0HSETB EASETB ET1SETB ET0SETB EX0SETB EX1SETB IT0SETB IT1SETB TR1MOV 32H,#00HMOV R1,#80HMOV 30H,#00HLOOP: MOV A,R4 CJNE A,33,YMOV A,R5CJNE A,32H,YINC 30HY: MOV A,P3 CJNE A,#0CFH,Y1 LJMP Y2Y1: MOV A,30H CJNE A,#01H,LOOPCLR P10LCALL DELAY2SETB P10LCALL DELAY2LJMP LOOPY2:JNB P35,Y2JNB P34,Y2MOV R3,#0AHLJMP Y3Y3: MOV R4,33H MOV R5,32H MOV A,P3 CJNE A,#0DFH,Y5 Y4:JNB P34,OUT JNB P35,Y4 INC 32HMOV A,32HCJNE A,#10,Y3INC 33HMOV 32H,#00H LJMP Y3Y5: MOV A,P3 CJNE A,#0EFH,Y3 Y6: JNB P35,OUT JNB P34,Y6MOV A,32HCJNE A,#00,JJDEC 33HMOV 32H,#09HLJMP Y3OUT:JNB P35,OUT JNB P34,OUTMOV R5,#00H MOV R3,#00HLJMP LOOPJJ: DEC 32HLJMP Y3INT_0: CPL TR0 RETIINT_1: MOV R6,#00H MOV R5,#00H MOV R4,#00H MOV R3,#00H MOV R0,#00H MOV 30H,#00HT0_INT: MOV TH0,#0D8H MOV TL0,#0F0H INC R0 CJNE R0,#0AH,T0_END MOV R0,#00H INC R6 CJNE R6,#0AH,T0_END MOV R6,#00H INC R5 CJNE R5,#0AH,T0_END MOV R5,#00H INC R4 CJNE R4,#0AH,T0_END MOV R4,#00H INC R3 CJNE R3,#0AH,T0_END MOV R3,#00HT0_END:RETIT1_INT:MOV TH1,#0D8HMOV TL1,#0F0HCJNE R1,#04H,NEXT1MOV R1,#80HNEXT1: CJNE R1,#80H,NEXT2MOV P2,R1MOV A,R6MOV DPTR,#TABMOVC A,A+DPTRMOV P0,AAJMP NEXT6NEXT2: CJNE R1,#40H,NEXT3MOV P2,R1MOV A,R5MOV DPTR,#TABMOVC A,A+DPTRMOV P0,AAJMP NEXT6NEXT3: CJNE R1,#20H,NEXT4MOV P2,R1MOV A,R4MOV DPTR,#TABMOVC A,A+DPTRMOV P0,AAJMP NEXT6NEXT4: CJNE R1,#10H,NEXT5MOV P2,R1MOV A,R3MOV DPTR,#TABMOVC A,A+DPTRMOV P0,AAJMP NEXT6NEXT5: CJNE R1,#08H,NEXT6MOV P2,#40HMOV P0,#7FHAJMP NEXT6NEXT6: MOV A,R1RR AMOV R1,AT1_END:RETIDELAY2:MOV 7DH,#250 DEL11:DJNZ 7DH,DEL21DEL21:NOP NOP NOP NOP NOP NOP NOP