單片機(jī)課程設(shè)計(jì)總會(huì)-資料下載頁(yè)
2025-06-26 12:37本頁(yè)面
【正文】 R7,A 。個(gè)位數(shù)暫存R7 MOV B,10 MOV A,R4 MUL AB 。十位數(shù) ADD A,R7 MOV R4,A 。輸入值存R4 MOV 32H,00H 。輸入值送顯示緩存 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 ADD A,R7 JB CY,E3 。輸入溢出 MOV R4,A MOV 32H,33H 。輸入值送顯示緩存 MOV 33H,34H MOV 34H,R7 LJMP MLOOPE3: MOV R3,0 。按鍵次數(shù)清零 MOV R4,0 。輸入值清零 MOV YJ,0 。計(jì)算結(jié)果清零 MOV GONG,0 。功能鍵設(shè)為零 MOV 32H,00H 。顯示清空 MOV 33H,00H MOV 34H,00H LJMP MLOOPE2: MOV 34H,00H MOV 33H,00H MOV 32H,00H MOV R0,GONG 。與上次功能鍵交換 MOV GONG,A MOV A,R0 CJNE A,10,N21 。判斷功能鍵 LJMP JIA 。＋N21: LJMP DEN 。=N4: LJMP E3JIA: MOV A,YJ 。上次結(jié)果送累加器 ADD A,R4 。上次結(jié)果加輸入值 JB CY,N4 。溢出 MOV YJ,A 。存本次結(jié)果 MOV R3,0 。按鍵次數(shù)清零 LJMP DISP1DEN: MOV R3,0 LJMP DISP1DISP1: MOV B,10 MOV A,YJ 。結(jié)果送累加器 DIV AB 。結(jié)果除10 MOV YJ1,A 。暫存商 MOV A,B 。取個(gè)位數(shù) MOV 34H,A 。個(gè)位數(shù)送顯示緩存 MOV A,YJ1 JZ DISP11 。結(jié)果是否為一位數(shù) MOV B,10 MOV A,YJ1 DIV AB MOV YJ1,A MOV A,B MOV 33H,A 。十位送顯示緩存 MOV A,YJ1 JZ DISP11 。結(jié)果是否為二位數(shù) MOV 32H,A 。百位數(shù)送顯示緩存DISP11: LJMP MLOOPDISP: MOV R0,34HDIR1: MOV DPTR,SEGTAB MOV A,@R0 MOVC A,@A+DPTR MOV P0,A CJNE R0,34H,DIR2 SETB CALL D1MS CLR DEC R0 SJMP DIR1DIR2: CJNE R0,33H,DIR3 SETB CALL D1MS CLR DEC R0 SJMP DIR1DIR3: SETB CALL D1MS CLR RETD1MS: MOV R7,02HDMS: MOV R6,0F0H DJNZ R6,$ DJNZ R7,DMS RETSEGTAB: DB 0C0H, 0F9H, 0A4H, 0B0H ；數(shù)碼管顯示數(shù)字定義 DB 99H, 92H, 82H, 0F8H DB 80H, 90H, 88H, 83H DB 0C6H, 0A1H, 86H, 8EHTESTKEY:ACALL DISP MOV P1,0FH 。讀入鍵狀態(tài) MOV A,P1 CPL A ANL A,0FH 。高四位不用 RETKEYTABLE: DB 0EEH,0EDH,0DDH,0BDH 。鍵碼定義 DB 0EBH,0DBH,0BBH,0E7H DB 0D7H,0B7H,0DEH,0BEH DB 07EH,07DH,07BH,077HGETKEY: ACALL DELAY 。讀鍵子程序 MOV P1,0DH MOV A,P1 CJNE A,0DH,K12 LJMP MLOOPK12: MOV B,A MOV P1,0EFH MOV A,P1 CJNE A,0EFH,K13 MOV P1,0DFH MOV A,P1 CJNE A,0DFH,K13 MOV P1,0BFH MOV A,P1 CJNE A,0BFH,K13 MOV P1,07FH MOV A,P1 CJNE A,07FH,K13 LJMP MLOOPK13: ANL A,0F0H ORL A,B 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 R7,10 。10ms延時(shí)子程序TS1: MOV R6,0FFH TS2: NOP NOP DJNZ R6,TS2 DJNZ R7,TS1 RET END29
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