數(shù)字定時器設(shè)計-資料下載頁
2025-06-30 01:14本頁面
【正文】 SET0:MOV@R0,00HAJMPJCTZINCR:INC@R0AJMPJCTZDEN1:ACALLXSCXAJMPDEN0DEN3:ACALLXSCXAJMPDEN2TCTS:MOVTH0,3CH退出調(diào)時程序MOVTL0,0B0HMOV45H,00H將狀態(tài)顯示碼更改為D（等待狀態(tài)）RETT0中斷子程序T0ZD:CLREAT0中斷子程序,關(guān)中斷（T0ZD)CLRET0CLRTR0DJNZ46H,TCZDMOV46H,02H當定時兩次后重新給計時次數(shù)賦值為2MOV R0,40H 。減1計數(shù),R0為40H CJNE @R0,01H,R040 INC R0 。R0為41H CJNE @R0,00H,DEC1 INC R0 。R0為42H CJNE @R0,00H,DEC1 INC R0 。R0為43H CJNE @R0,00H,DEC1 INC R0 。R0為44H CJNE @R0,00H,DEC1 AJMP JYFH R040:CJNE @R0,00H,DEC1 。R0為40H INC R0 。R0為41H CJNE @R0,00H,R041 INC R0 。R0為42H CJNE @R0,00H,R042 INC R0 。R0為43H CJNE @R0,00H,R043 INC R0 。R0為44H CJNE @R0,00H,R044 AJMP ZJFH R041:MOV 40H,09H DEC 41H AJMP TCZD R042:MOV 40H,09H MOV 41H,09H DEC 42H AJMP TCZD R043:MOV 40H,09H MOV 41H,09H MOV 42H,05H DEC 43H AJMP TCZDR044:MOV 40H,09H MOV 41H,09H MOV 42H,05H MOV 43H,09H DEC 44H AJMP TCZD DEC1:DEC 40H TCZD:MOV TH0,3CH 。退出中斷子程序 MOV TL0,0B0H SETB EA SETB ET0 SETB TR0 AJMP ZZFH JYFH:DEC 40H ZJFH:SETB 。啟動蜂鳴器 ZZFH:RETI XDYS:ACALL XSCX 。消抖延時程序，延時10ms（2*5ms） ACALL XSCX 。采用調(diào)用顯示子程序延時以改善LED顯示效果 RET XSYS:MOV 55H,20 。顯示延時程序，延時1msDEL2:MOV 56H,25 DEL1:DJNZ 56H,DEL1 DJNZ 55H,DEL2 RET TAB:DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH TAB1:DB 0BFH,86H,0DBH,0CFH,0E6H,0EDH,0FDH,87H,0FFH,0EFHTAB2:DB 040H,79H 。D等待狀態(tài)，E調(diào)時狀態(tài) END
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