基于51單片機的數(shù)字頻率計畢業(yè)設計論文-資料下載頁
2025-06-28 00:49本頁面
【正文】 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 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 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 。寫數(shù)據(jù) a2: mov a, r1 movc a, @a+dptr call write2 inc r1 cjne a,00h,a2 ret delay: mov r7, 255 d1: mov r6, 255 d2: djnz r6, d2 djnz r7, d1 ret date: db the frequency is,00h date1: db 30h,31h,32h,33h,34h,35h,36h,37h,38h,39h DANWEI1: DB HZ ,00h DANWEI2: DB KHZ ,00h XIAOSHUDIAN: DB .,00h21
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