基于51單片機的數(shù)字頻率計_畢業(yè)設(shè)計論文(參考版)
2025-07-07 12:41本頁面
【正文】 第二行的位置 call enable MOV A,17H XRL A,02H 18 JNZ XIAN1 MOV 40H,00H MOV 41H,00H MOV 42H,00H MOV 43H,30H MOV 44H,31H MOV 45H,32H JMP XIAN XIAN1:MOV A,17H XRL A,01H JNZ XIAN2 MOV 40H,00H MOV 41H,00H MOV 42H,30H MOV 43H,31H MOV 44H,32H MOV 45H,33H JMP XIAN XIAN2:MOV A,17H XRL A,00H JNZ XIAN3 MOV 40H,00H MOV 41H,30H MOV 42H,31H MOV 43H,32H MOV 44H,33H MOV 45H,34H JMP XIAN XIAN3:MOV A,17H XRL A,03H JNZ XIAN MOV 40H,30H MOV 41H,31H MOV 42H,32H MOV 43H,33H MOV 44H,34H MOV 45H,35H XIAN:mov r0,40h mov a, r0 JZ L20 MOV 10H,0FFH 19 MOV 15H,0FFH mov dptr,date1 movc a,a+dptr call write2 L20:INC R0 MOV A, 10H CJNE A, 00H,PP mov a, r0 JZ L21 PP: MOV 11H,0FFH MOV 15H,0FFH mov a, r0 mov dptr,date1 movc a,a+dptr call write2 L21:INC R0 MOV A, 11H CJNE A, 00H,PP2 mov a, r0 JZ L22 PP2: MOV 12H,0FFH MOV 15H,0FFH mov a, r0 mov dptr,date1 movc a,a+dptr call write2 MOV A, 15H CJNE A,0FFH,L22 MOV A,00H mov dptr,XIAOSHUDIAN movc a,a+dptr call write2 L22: INC R0 MOV A, 12H CJNE A, 00H,PP3 mov a, r0 JZ L23 PP3: MOV 13H,0FFH mov a, r0 mov dptr,date1 20 movc a,a+dptr call write2 L23:INC R0 MOV A, 13H CJNE A, 00H,PP4 mov a, r0 JZ L24 PP4: MOV 14H,0FFH mov a, r0 mov dptr,date1 movc a,a+dptr call write2 L24:INC R0 mov a, r0 mov dptr,date1 movc a,a+dptr call write2 MOV A,15H CJNE A, 00H,KHZ MOV A,00H MOV dptr,DANWEI1 JMP QUSHU KHZ:MOV dptr,DANWEI2 QUSHU:movc a,a+dptr call write3 mov r5,4 l3:mov a,20h call write2 djnz r5,l3 ret write2: mov p0, a setb rs CLR rw clr e call delay setb e ret write3: mov r1,00h 。************** ENABLE: CLR RS CLR RW CLR E ACALL DELAY SETB E RET write1: 。************** 。益處 進位 JMP CHA JINWEI:CLR TR1 mov th1,high(6553650000) mov tl1,low(6553650000) SETB TR1 INC R3 MOV A,R3 。setb ET1 cha1: SETB TR1
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