With the c language pull-screen digital display, with AT89C51 microcontroller digital tube display, the program using keil write, experimental simulation has protel99se implementation, has been successfully verified, which contains the procedures and simulation files.

实验二十一拉幕式数码显示技术\STARTUP.A51
............................\Led21keil.plg
............................\Led21.c
............................\STARTUP.lst
............................\Led21keil.M51
............................\Led21keil.hex
............................\STARTUP.obj
............................\Led21.LST
............................\Led21.OBJ
............................\Led21keil
............................\Last Loaded Led21.DBK
............................\Led21.dsn
............................\Led21.PWI
............................\Led21keil_Uv2.Bak
............................\Led21keil.Uv2
............................\Led21keil_Opt.Bak
............................\Led21keil.Opt
实验二十一拉幕式数码显示技术

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