仿真電路圖：
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2020-2-3 12:27 上傳
匯編程序代碼:
- SECOND EQU 30H
- TCOUNT EQU 31H
- ORG 0000H
- START:CLR P1.7;
- MOV SECOND,#60;
- MOV TCOUNT,#00H;
- MOV TMOD,#01H;
- MOV TH0,#3CH;
- MOV TL0,#0B0H;
- SETB TR0;
-
- DISP: MOV A,SECOND;
- MOV B,#10;
- DIV AB;
- MOV DPTR,#TABLE;
- MOVC A,@A+DPTR;
- MOV P0,A;
- MOV A,B;
- MOVC A,@A+DPTR;
- MOV P2,A;
- WAIT: JNB TF0,WAIT;檢查是否50ms計時到
- CLR TF0;
- MOV TH0,#3CH;
- MOV TL0,#0B0H;
- INC TCOUNT;
- MOV A,TCOUNT;
- CJNE A,#20,NEXT;判斷計時的50ms次數是否20次，即判斷是否計時了一秒鐘
- MOV TCOUNT,#00H;
- DEC SECOND;
- MOV A,SECOND;
- CJNE A,#00,NEX; 判斷是否計時了一分鐘，如果夠了則重新開始
- MOV SECOND,#60;
- NEXT: LJMP WAIT;
- NEX: LJMP DISP;
- TABLE:
- DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
- END
-
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