【導(dǎo)讀】術(shù)的不斷發(fā)展，人們對時間計量的精度要求越來越高，應(yīng)用越來越廣。更好的為人民服務(wù)，怎樣讓我們的老朋友煥發(fā)青春呢？能，還可以進行時和分的校對，片選的靈活性好?，F(xiàn)在我們利用單片機實現(xiàn)數(shù)字時。鐘計時功能的主要內(nèi)容，其中AT89C51是核心元件同時采用數(shù)碼管動態(tài)顯示“時”，與傳統(tǒng)機械表相比，它具有走時精確,顯示直觀等特。它的計時周期為24小時，顯滿刻度為“23時59分59秒”，另外具有校時功能，時鐘電路在計算機系統(tǒng)中起著非常重要的作用，是保證系統(tǒng)正常工作的基礎(chǔ)。ROM、定時、計數(shù)和多種接口于一體的微控制器。而51單片機是各單片機中最為典型和最有代表性。所以綜上所述，此次實驗中所完成的數(shù)字鐘有著強大的功能和良好的市場。通過對按鍵的操作實現(xiàn)時間及擴展功能的設(shè)置。調(diào)時快進，此時停止閃爍，方便人眼觀察。進入時間設(shè)置界面后，通過調(diào)整選擇鍵SET_KEY選擇調(diào)整位，選中位閃爍。增加鍵ADD_KEY或減少鍵DEC_KEY設(shè)置所需要的時間。CLRA;時間萬年歷初始化時間00:00:00萬年歷2020。

　　

【正文】 MOV R7,07H RET KEY80: MOV R7,08H RET KEY90: MOV R7,09H RET KEY00: MOV R7,00H RET TUI: MOV R7,0BH RET KEY0C0: MOV R7,0CH RET /****************************************************/ //鬧鈴響 XIANG: CLR //ACALL MDELAY //SETB JB T1,XIANG 。s20 退出鬧鈴 跳回主循環(huán) SETB AJMP ZHUXUNHUAN 電子 系統(tǒng)綜合設(shè)計課程論文 31 /****************************************************/ //鬧鐘設(shè)置 NAOZHONGSHEZHI: //檢測是哪個鬧鐘 并初始化鬧鐘設(shè)置 CJNE R7,01H,NZ2 MOV A,50H MOV B,0AH DIV AB MOV 45H,A MOV 44H,B MOV A,51H MOV B,0AH DIV AB MOV 43H,A MOV 42H,B MOV A,52H MOV B,0AH DIV AB MOV 41H,A MOV 40H,B MOV 09H,50H MOV 47H,01H MOV 08H,0AH AJMP NANJIAN NZ2: CJNE R7,02H,NZ3 MOV A,53H MOV B,0AH DIV AB MOV 45H,A MOV 44H,B MOV A,54H MOV B,0AH DIV AB MOV 43H,A 電子 系統(tǒng)綜合設(shè)計課程論文 32 MOV 42H,B MOV A,55H MOV B,0AH DIV AB MOV 41H,A MOV 40H,B MOV 09H,53H MOV 47H,02H MOV 08H,0BH AJMP NANJIAN NZ3: CJNE R7,03H,NZ4 MOV A,56H MOV B,0AH DIV AB MOV 45H,A MOV 44H,B MOV A,57H MOV B,0AH DIV AB MOV 43H,A MOV 42H,B MOV A,58H MOV B,0AH DIV AB MOV 41H,A MOV 40H,B MOV 09H,56H MOV 47H,03H MOV 08H,0CH AJMP NANJIAN NZ4: CJNE R7,04H,NZ5 MOV A,59H MOV B,0AH 電子 系統(tǒng)綜合設(shè)計課程論文 33 DIV AB MOV 45H,A MOV 44H,B MOV A,5AH MOV B,0AH DIV AB MOV 43H,A MOV 42H,B MOV A,5BH MOV B,0AH DIV AB MOV 41H,A MOV 40H,B MOV 09H,59H MOV 47H,04H MOV 08H,0DH AJMP NANJIAN NZ5: MOV A,5CH MOV B,0AH DIV AB MOV 45H,A MOV 44H,B MOV A,5DH MOV B,0AH DIV AB MOV 43H,A MOV 42H,B MOV A,5EH MOV B,0AH DIV AB MOV 41H,A MOV 40H,B MOV 09H,5CH MOV 47H,05H 電子 系統(tǒng)綜合設(shè)計課程論文 34 MOV 08H,0EH AJMP NANJIAN NANJIAN: MOV 3AH,11111100B 。界面轉(zhuǎn)換成鬧鐘設(shè)置界面 MOV 39H,11011111B MOV 37H,39H MOV 3DH,0FFH 。開閃爍 NM: MOV R1,08H JB T0,XIA1 。s19 鬧鐘開關(guān) MOV A,@R1 CPL A MOV @R1,A XIA1: MOV A,@R1 JZ XIA2 MOV 46H,0BH JMP XIA3 XIA2: MOV 46H,0AH XIA3: JB T1,NS1 。s20 退出鬧鐘設(shè)置 跳回主程序 //鬧鐘數(shù)據(jù)保存 MOV 39H,0FFH MOV 3DH,00H MOV 3AH,11111101B MOV R1,09H MOV A,45H MOV B,0AH MUL AB ADD A,44H MOV @R1,A INC R1 MOV A,43H MOV B,0AH MUL AB 電子 系統(tǒng)綜合設(shè)計課程論文 35 ADD A,42H MOV @R1,A INC R1 MOV A,41H MOV B,0AH MUL AB ADD A,40H MOV @R1,A AJMP ZHUXUNHUAN NS1: JB INT0,NS2 。修改位右移 同上 MOV A,37H CJNE A,11111110B,NSS0 RR A RR A RR A MOV 37H,A S30: JNB INT0,S30 AJMP NM NSS0: RR A MOV 37H,A S31: JNB INT0,S31 AJMP NM NNM:AJMP NM NS2: JB INT1,NM1 。修改位左移 同上 MOV A,37H CJNE A,11011111B,NSS1 RL A RL A RL A MOV 37H,A 電子 系統(tǒng)綜合設(shè)計課程論文 36 S32: JNB INT1,S32 LJMP NM NSS1: RL A MOV 37H,A S33: JNB INT1,S33 LJMP NM NM1: //矩陣鍵盤檢測 修改鬧鐘 同時間設(shè)置 MOV R7,0FH LCALL JIANCEANJIAN CJNE R7,0FH,NSJSZ1 LJMP NM NSJSZ1: MOV A,37H JB ,NSJSZ2 CJNE R7,00H,NSJS1 LJMP NLED6 NSJS1: CJNE R7,01H,NSJS2 LJMP NLED6 NSJS2: CJNE R7,02H,NMM AJMP NLED6 NLED6: MOV 45H,R7 MOV A,37H RR A MOV 37H,A LJMP NM NSJSZ2: JB ,NSJSZ3 MOV A,45H 電子 系統(tǒng)綜合設(shè)計課程論文 37 CJNE A,02H,NLED5 CJNE R7,00H,NSJS4 AJMP NLED5 NSJS4: CJNE R7,01H,NSJS5 AJMP NLED5 NSJS5: CJNE R7,02H,NSJS6 AJMP NLED5 NSJS6: CJNE R7,03H,NMM1 AJMP NLED5 NMM1:LJMP NNM NLED5: MOV 44H,R7 MOV A,37H RR A MOV 37H,A LJMP NM NSJSZ3: JB ,NSJSZ4 CJNE R7,00H,NSJ1 LJMP NLED4 NSJ1: CJNE R7,01H,NSJ2 AJMP NLED4 NSJ2: CJNE R7,02H,NSJ3 AJMP NLED4 NSJ3: CJNE R7,03H,NSJ4 AJMP NLED4 NSJ4: CJNE R7,04H,NSJ5 AJMP NLED4 電子 系統(tǒng)綜合設(shè)計課程論文 38 NSJ5: CJNE R7,05H,NMM AJMP NLED4 NMM:LJMP NM NLED4: MOV 43H,R7 MOV A,37H RR A MOV 37H,A LJMP NM NSJSZ4: JB ,NSJSZ5 MOV 42H,R7 MOV A,37H RR A MOV 37H,A AJMP NMM0 NSJSZ5: JB ,NSJSZ6 CJNE R7,00H,NSJ10 AJMP NLED2 NSJ10: CJNE R7,01H,NSJ20 AJMP NLED2 NSJ20: CJNE R7,02H,NSJ30 AJMP NLED2 NSJ30: CJNE R7,03H,NSJ40 AJMP NLED2 NSJ40: CJNE R7,04H,NSJ50 AJMP NLED2 NSJ50: CJNE R7,05H,NMM0 電子 系統(tǒng)綜合設(shè)計課程論文 39 AJMP NLED2 NMM0:LJMP NM NLED2: MOV 41H,R7 MOV A,37H RR A MOV 37H,A LJMP NM NSJSZ6: MOV 40H,R7 MOV 37H,11011111B LJMP NM END