單片機課程設(shè)計——計算器設(shè)計-閱讀頁
2025-07-11 13:00本頁面
【正文】 MOV 33H,34H MOV 34H,R7 LJMP MLOOPE13: MOV R7,A MOV B,10 MOV A,R4 MUL AB JB OV,E3 。輸入溢出 MOV R4,A MOV 32H,33H 。按鍵次數(shù)清零 MOV R4,0 。計算結(jié)果清零 MOV GONG,0 。顯示清空 MOV 33H,00H MOV 34H,00H LJMP MLOOPE2: MOV 34H,00H MOV 33H,00H MOV 32H,00H MOV R0,GONG 。判斷功能鍵 LJMP JIA 。－N22: CJNE A,12,N23 LJMP CHENG 。/N24: CJNE A,0,N25 LJMP FIRST 。=N4: LJMP E3FIRST: MOV YJ,R4 。按鍵次數(shù)清零 LJMP DISP1 。上次結(jié)果送累加器 ADD A,R4 。溢出 MOV YJ,A 。按鍵次數(shù)清零 LJMP DISP1 //減法//JIAN: MOV A,YJ SUBB A,R4 。負數(shù)溢出,JB位變量條件轉(zhuǎn)移指令，若直接尋址位的值為1，則執(zhí)行轉(zhuǎn)移 MOV YJ,A MOV R3,0 LJMP DISP1 //乘法//CHENG: MOV A,YJ MOV B,A MOV A,R4 MUL AB 。溢出 MOV YJ,A LJMP DISP1 //除法//CHU: MOV A,R4 MOV B,A MOV A,YJ DIV AB 。十位送顯示緩存 MOV A,YJ1 JZ DISP11 。百位數(shù)送顯示緩存DISP11: LJMP MLOOP ?；拇嫫鱀PTR存入輸入的數(shù)據(jù)值 MOV A,R0 。基寄存器加變址寄存器間接尋址 MOV P0,A CJNE R0,34H,DIR2 SETB DIR2: CJNE R0,33H,DIR3 SETB CALL D1MS CLR 。減1指令 SJMP DIR1DIR3: SETB CALL D1MS CLR RETD1MS: MOV R7,02HDMS: MOV R6,0F0H DJNZ R6,$ 。0 1 2 3定義字節(jié) DB 99H, 92H, 82H, 0F8H 。8 9 A B DB 0C6H, 0A1H, 86H, 8EH 。讀入鍵狀態(tài) MOV A,P1 CPL A 。高四位不用,與操作，屏蔽高四位 RETKEYTABLE: DB 0D7H,0EBH,0DBH,0BBH 。DB 07EH,07DH,07BH,0E7H 。DB 0D7H,0B7H,0DEH,0BDH 。DB 077H,0EEH,0BEH,0EDHGETKEY: MOV R6,10 ?；虿僮鳎糜跀?shù)據(jù)拼裝 MOV B,A MOV R1,16 MOV R2,0 MOV DPTR,KEYTABLEK14: MOV A,R2 MOVC A,A+DPTR CJNE A,B,K16 MOV P1,0FHK15: MOV A,P1 CJNE A,0FH,K15 MOV R6,10 ACALL DELAY MOV A,R2 RETK16: INC R2 DJNZ R1,K14 AJMP MLOOPDELAY: MOV R7,10TS1: MOV R6,0FFH TS2: NOP
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鄂ICP備17016276號-1