含BCD码及加减未完.doc

含BCD码及加减未完ORG 0000H LJMP MAIN ORG 0003H LJMP INTT0 ;指向紧急车辆出现中断程序 ORG 0013H LJMP INTT1 ;指向主道有车，从道无车 ORG 001BH LJMP TT1 ORG 0100HTT1: MOV TH1,#0D8H ;定时器1，定时10us MOV TL1,#0F0H DJNZ R6,EXIT MOV R6,#100 ;定时器定时100次 MOV R1,#0FFHEXIT: RETIINTT0: PUSH P0 PUSH P1 PUSH P2 ;P1口数据压栈保护 PUSH 03H ;R3寄存器压栈保护 PUSH TH1 ;TH1压栈保护 PUSH TL1 ;TL1压栈保护 DELA: MOV P1, #0EEH ;外部中断0， MOV P2, #0FFH JNB P3.0, EXIT1 AJMP DELA EXIT1: POP TL1 POP TH1 POP 03H POP P2 POP P1 POP P0 RETIDELAY: MOV R5,#200 ;50msDEL1: MOV R6,#123DEL2: NOP NOP DJNZ R6,DEL2 DJNZ R5,DEL1 RETINTT1: PUSH P0 PUSH P1 PUSH P2 PUSH 03H PUSH TH1 PUSH TL1 CLR EA MOV P2,#0FFH SW: JB P3.1, SW0 I1: MOV P1,#0EBH MOV P2,#0FFH ;外部中断1， JNB P3.0, BPAJMP I1SW0:JB P3.4, SW1 I2: INC 30H INC 31H INC 32H INC 33H INC 34H ;外部中断1， SW1: JB P3.5, SW2 DEC 30H DEC 31H DEC 32H DEC 33H DEC 34H ;外部中断1， JNB P3.0, BP AJMP SW2: AJMP SWBP: MOV P1,#0DEHEXIT2: SETB EA POP TL1POP TH1POP 03HPOP P2POP P1POP P0 RETI ORG 1000HMAIN: MOV SP,#40H MOV R6,#100 ;主程序； MOV R1,#00H MOV TMOD,#10H ;初始化 MOV TH1,#0D8H MOV TL1,#0F0H MOV IE,#8DH MOV 20H,#30 MOV 21H,#3 MOV 22H,#15 MOV 23H,#33 MOV 24H,#18 MOV 30H,#30 MOV 31H,#3 MOV 32H,#15 MOV 33H,#33 MOV 34H,#18 SETB TR1ST1: MOV P1,#0EBH ;第一个状态，主干道亮绿灯、支干道亮红灯； CJNE R1,#0FFH,TZ1 MOV R1,#00H DEC 20H DEC 23HTZ1: MOV R2,20H MOV R3,23H LCALL DISP ;调用显示子程序。 MOV A,20H CJNE A,#00H,ST1 MOV 20H,30HST2: MOV P1,#0EDH ;第二个状态，主干道亮黄灯、支干道亮红灯； CJNE R1,#0FFH,TZ2 MOV R1,#00H DEC 21H DEC 23HTZ2: MOV R2,21H MOV R3,23H LCALL DISP ;调用显示子程序。 MOV A,21H CJNE A,#00H,ST2 MOV 21H,31H MOV 23H,33HST3: MOV P1,#0DEH ;第三个状态，主干道亮红灯、支干道亮绿灯； CJNE R1,#0FFH,TZ3 MOV R1,#00H DEC 24H DEC 22HTZ3: MOV R2,24H MOV R3,22H LCALL DISP ;调用显示子程序。 MOV A,22H CJNE A,#00H,ST3 MOV 22H,32HST4: MOV P1,#0F6H ;第四个状态，主干道亮红灯、支干道亮黄灯； CJNE R1,#0FFH,TZ4 MOV R1,#00H DEC 24H DEC 21HTZ4: MOV R2,24H MOV R3,21H LCALL DISP ;调用显示子程序。 MOV A,21H CJNE A,#00H,ST4 MOV 21H,31H MOV 24H,34H LJMP ST1 ;跳转到第一个状态。DISP: MOV A, R2 MOV DPTR, #TAB MOVC A, A+DPTR ;显示子程序。 MOV B,#10 DIV AB MOV 60H,A MOV 61H,B MOV A, R3 MOV DPTR, #TAB MOVC A, A+DPTR MOV A,R3 MOV B,#10 DIV AB MOV 62H,A MOV 63H,B MOV 40H,#04H MOV R5,#0FEH MOV R0,#60HLLP: MOV A,R0 MOV DPTR,#TABLE MOVC A,A+DPTR MOV P0,A MOV A,R5 MOV P2,A LCALL DELAY1 MOV P2, #0FFH; 注意，这里是程序修改的地方，令显示器熄灭，以免产生残影 RL A MOV R5,A INC R0 DJNZ 40H,LLP RETDELAY1: ;延时子程序 MOV R4,#14DL2: MOV R7,#14 DJNZ R7,$ DJNZ R4,DL2 RET TABLE:DB 3FH,24H,5dH,75H,66H DB 73H,7bH,25H,7fH,77HTAB: DB 00H,01H,02H,03H,04H,05H,06H,07H DB 08H,09H,10H,11H,12H,13H,14H,15H DB 16H,17H,18H,19H,20H,21H,22H,23H DB 24H,25H,26H,27H,28H,29H,30H,31H DB 32H,33H,34H,35H,36H,37H,38H,39H DB 40H,41H,42H,43H,44H,45H,46H,47H DB 48H,49H,50H,51H,52H,53H,54H,55H DB 56H,57H,58H,59H,60H,61H,62H,63H DB 64H,65H,66H,67H,68