課程設(shè)計論文-基于51單片機的數(shù)字時鐘-wenkub
2022-11-05 19:16:28 本頁面
【正文】 MOV A,40H 取掃描控制字放入 A 中 RL A A 中數(shù)據(jù)循環(huán)左移 MOV 40H,A 放回 40H 地址段內(nèi) MOV P2,40H MOV A,31H ADD A,10 進位顯示 MOVC A,A+DPTR MOV P0,A LCALL YS1MS MOV P0,0FFH MOV A,40H RL A MOV 40H,A MOV P2,40H MOV A,32H MOVC A,A+DPTR MOV P0,A LCALL YS1MS 11 MOV P0,0FFH MOV A,40H RL A MOV 40H,A MOV P2,40H MOV A,33H ADD A,10 MOVC A,A+DPTR MOV P0,A LCALL YS1MS MOV P0,0FFH MOV A,40H RL A MOV 40H,A MOV P2,40H MOV A,34H MOVC A,A+DPTR MOV P0,A 12 LCALL YS1MS MOV P0,0FFH MOV A,40H RL A MOV 40H,A MOV P2,40H MOV A,35H MOVC A,A+DPTR MOV P0,A LCALL YS1MS MOV P0,0FFH MOV A,40H RL A MOV 40H,A JB TF0,JIA 如果 TF0 為 1 時，則執(zhí)行 JIA，否則順序執(zhí)行 JNB ,P100 為 0 則 轉(zhuǎn)移到 P100 JNB ,P1000 為 0 則 轉(zhuǎn)移到 P1000 JNB ,P10000 為 0 則 轉(zhuǎn)移到 P10000 13 AJMP XS 跳轉(zhuǎn)到 XS P100: MOV 30H,0 清零程 序 MOV 31H,0 MOV 32H,0 MOV 33H,0 MOV 34H,0 MOV 35H,0 JIA: CLR TF0 TF0 清零 MOV A,35H 秒單位數(shù)據(jù)到 A CJNE A,9,JIA1 與 9 進行比較，大于 9 就轉(zhuǎn)移到 JIA1 MOV 35H,0 秒個位清零 MOV A,34H 秒十位數(shù)據(jù)到 A CJNE A,5,JIA10 與 5 進行比較，大于 5 就轉(zhuǎn)移到 JIA10 MOV 34H,0 秒十位清零 P10000: JNB ,P10000 為 0 則 轉(zhuǎn)移到 P10000 MOV A,33H 取分的個位到 A CJNE A,9,JIA100 與 9 進行比較，大于 9 就轉(zhuǎn)移到 JIA100 MOV 33H,0 分的個位清零 14 MOV A,32H 分十位數(shù)據(jù)到 A CJNE A,5,JIA1000 與 5 進行比較，大于 5 就轉(zhuǎn)移到 JIA1000 MOV 32H,0 分的十位清零 P1000: JNB ,P1000 為 0 則 轉(zhuǎn)移到 P1000 MOV A,31H 時個位數(shù)據(jù)到 A CJNE A,9,JIA10000 與 9 進行比較，大于 9 就轉(zhuǎn)移到JIA10000 MOV 31H,0 時的個位清零 MOV A,30H 時十位數(shù)據(jù)到 A CJNE A,2,JIA100000 與 2 進行比較，大于 5 就轉(zhuǎn)移到JIA100000 MOV 30H,0 時的十位清零 AJMP XS0 轉(zhuǎn)移到 XSO JIA100000: INC 30H 加 1 AJMP XS0 跳轉(zhuǎn)到 XS0 JIA10000: CJNE A,3,JIAJIA 與 3 進行比較，大于則轉(zhuǎn)移到 JIAJIA 15 MOV A,30H 將時的十位放到 A CJNE A,02,JIAJIA 與 2 進行比較，大于則轉(zhuǎn)移到 JIAJIA MOV 30H,0 時段清零 MOV 31H,0 AJMP XS0 跳轉(zhuǎn)到 XSO JIAJIA: INC 31H 加一 AJMP XS0 JIA1000:INC 32H AJMP XS0 JIA100: INC 33H AJMP XS0 JIA10: INC 34H AJMP XS0 JI
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