頻率計(jì)課設(shè)-基于mcs-51單片機(jī)的頻率計(jì)的設(shè)計(jì)(參考版)
2025-06-11 12:27本頁(yè)面
【正文】 發(fā)送起始位 SETB NOP NOP NOP NOP CLR NOP NOP NOP NOP CLR RET STOP: CLR 。 將需要顯示的位數(shù)存入 R2 MOV R0,50H MOV R1,5FH MOV DPTR,TAB NEXT3: MOV A,RO MOVC A,A+DPTR INC R0 INC R1 MOV R1,A DJNZ R2,NEXT3 MOV MTD,10H MOV NUMBYT,09H MOV SLA,70H LCALL WRNBYT RET WRNBYT: PUSH PSW WRNBYT1: MOV PSW,18h CALL STA MOV A,SLA CALL WRB CALL CACK JB F0,WRNBYT MOV R0,MTD MOV R5,NUMBYT WRDA: MOV A,R0 LCALL CACK JB F0,WRNBYT1 INC R0 DJNZ R5， WRDA LCALL STOP POP PSW RET WRB: MOV R7,8 。 存儲(chǔ)十進(jìn)制數(shù)十萬(wàn)位 PINBI: 。存儲(chǔ)十位制數(shù)千位 MOV A,24H SWAP A ADD A,25H MOV B,0AH DIV AB MOV 54H,B 。存儲(chǔ)第一位商 MOV A,B SWAP A ADD A,26H MOV B,0AH DIV AB MOV 25H,A 。存儲(chǔ)第三位商 MOV 52H,B 。存儲(chǔ)第一位商 MOV A,B SWAP A ADD A,26H MOV B,0AH DIV AB MOV 25H,A 。存儲(chǔ)第四位商 MOV 51H,B 。存儲(chǔ)第二位商 MOV A,B SWAP A ADD A,27H MOV B,0AH DIV AB MOV 26H,A 。存儲(chǔ)十進(jìn)制個(gè)位 MOV A,24H SWAP A ADD A,25H MOV B,0AH DIV AB MOV 24H,A 。存儲(chǔ)第四位商 MOV A,B SWAP A ANL 21H,0FH ADD A,21H MOV B,0AH DIV AB MOV 28H,A 。存儲(chǔ)第二位商 MOV A,B SWAP A ANL 22H,0FH ADD A,22H MOV B,0AH DIV AB MOV 26H,A 。進(jìn)制轉(zhuǎn)換 MOV A,23H MOV B,0AH DIV AB MOV 24H,A 。繼續(xù)定時(shí) MOV TL0,00H EXIT: RETI DISPLAY: MOV R0,60H MOV R1,80H。定時(shí) 10ms 產(chǎn)生中斷 DJNZ 20H,NEXT1 CLR TR1 CLR TR0 MOV 22H,TH1。等待中斷 XIANSHI1:
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