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標(biāo)題: 用51單片機(jī)定時(shí)器做6位數(shù)字頻率計(jì)仿真+匯編程序 [打印本頁]

作者: 51黑ff 時(shí)間: 2016-9-4 19:24
標(biāo)題: 用51單片機(jī)定時(shí)器做6位數(shù)字頻率計(jì)仿真+匯編程序

用proteus設(shè)計(jì)的電路仿真，51單片機(jī)定時(shí)器做6位數(shù)字頻率計(jì)原理圖如上.

匯編源程序：
ORG 0000H
   LJMP MAIN
   ORG 000BH
   LJMP IT0P
   ORG 0040H
MAIN:MOV 30H,#14H
   MOV 40H,#00H
   MOV 41H,#00H
   MOV P0,#00H
   MOV P1,#00H
   MOV P2,#00H
   MOV TMOD,#51H
   MOV IE,#82H
   MOV TH0,#3CH
   MOV TL0,#0B0H
   MOV TH1,#00H
   MOV TL1,#00H
   SETB TR0
   SETB TR1
   SJMP $
/********中斷服務(wù)程序********/
IT0P:MOV TH0,#3CH
   MOV TL0,#0B0H
   DJNZ 30H,LAST
   MOV 41H,TH1
   MOV 40H,TL1
   CLR TR1
   CLR TR0
   LCALL EXCH
   LCALL DISPLAY
   MOV TH1,#00H
   MOV TL1,#00H
LAST:RETI
/********轉(zhuǎn)換子程序********/
/*40H低8位,41H高8位,42H個(gè)位,43H十位,44H百位,45H千位,46H萬位;R3,R4余數(shù)*/
EXCH:PUSH PSW
   PUSH Acc
   MOV R0,#40H
   MOV R1,#46H
   MOV R2,#00H
WANW:CLR C    ;減去10000，所減的次數(shù)就是萬位,次數(shù)存在R2上
   MOV R0,#40H
   MOV A,@R0
   SUBB A,#10H
   MOV R3,A
   INC R0
   MOV A,@R0
   SUBB A,#27H
   MOV R4,A
   JC QIAN
   INC R2
   MOV 40H,R3
   MOV 41H,R4
   JMP WANW
QIAN:MOV 46H,R2    ;減去1000，所減的次數(shù)就是千位,次數(shù)存在R2上
   MOV R2,#00H
QIAA:CLR C
   MOV R0,#40H
   MOV A,@R0
   SUBB A,#0E8H
   MOV R3,A
   INC R0
   MOV A,@R0
   SUBB A,#03H
   MOV R4,A
   JC BAIW
   INC R2
   MOV 40H,R3
   MOV 41H,R4
   JMP QIAA
BAIW:MOV 45H,R2    ;減去100，所減的次數(shù)就是百位,次數(shù)存在R2上
   MOV R2,#00H
BAIB:CLR C
   MOV R0,#40H
   MOV A,@R0
   SUBB A,#64H
   MOV R3,A
   INC R0
   MOV A,@R0
   SUBB A,#00H
   MOV R4,A
   JC SHIW
   INC R2
   MOV 40H,R3
   MOV 41H,R4
   JMP BAIB
SHIW:MOV 44H,R2 ;減去10，所減的次數(shù)就是十位,次數(shù)存在R2上
   MOV R2,#00H
SHIS:CLR C
   MOV R0,#40H
   MOV A,@R0
   SUBB A,#0AH
   MOV R3,A
   JC GEWW
   INC R2
   MOV 40H,R3
   JMP SHIS
GEWW:MOV 43H,R2
   MOV 42H,40H
   POP Acc
   POP PSW
   RET
/********轉(zhuǎn)換子程序********/
DISPLAY:PUSH PSW
      PUSH Acc
MOV A,#00H
      ORL A,46H
MOV P0,A
MOV A,45H
SWAP A
ORL A,44H
MOV P1,A
MOV A,43H
SWAP A
ORL A,42H
MOV P2,A
POP Acc
POP PSW
RET
END

4位頻率計(jì).zip

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