基于單片機(jī)的簡易電子時鐘設(shè)計(編輯修改稿)
2024-07-24 19:48 本頁面
【文章內(nèi)容簡介】 MOV 34H,0 MOV 35H,0 MOV TMOD,01 啟動計數(shù)器XS0: SETB TR0 使 TRO位置1 MOV TH0,00H 計數(shù)器置零 MOV TL0,00HXS: MOV 40H,0FEH 掃描控制字初值 MOV DPTR,TAB 取段碼表地址 MOV P2,40H 從P2口輸出 MOV A,30H 取顯示數(shù)據(jù)到A MOVC A,@A+DPTR 查顯示數(shù)據(jù)對應(yīng)段碼 MOV P0,A 段碼放入P0中 LCALL YS1MS 顯示1MS MOV P0,0FFH PO端口清零 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(jìn)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 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 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 AJMP XS 跳轉(zhuǎn)到 XSP100: MOV 30H,0 清零程序 MOV 31H,0 MOV 32H,0 MOV 33H,0 MOV 34H,0 MOV 35H,0JIA: CLR TF0
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鄂ICP備17016276號-1