Using 8255 microcontroller IO port expansion program to achieve the keyboard by pressing a number on the digital display, the keyboard is pressed again, the number of digital will be to the left, you can display the number 6 is pressed, the display can be extended as a password Features

8255数码管键盘\Button_8255.C
..............\Button_8255.H
..............\Button_Dispaly_And_8255.C
..............\Button_Dispaly_And_8255.Tom
..............\Button_Dispaly_And_8255.uvgui.Tom
..............\Button_Dispaly_And_8255.uvopt
..............\Button_Dispaly_And_8255.uvproj
..............\Delay.c
..............\Delay.H
..............\Init_8255.C
..............\Init_8255.H
..............\Listings\8255_Init.lst
..............\........\Button_8255.lst
..............\........\Button_Dispaly_And_8255.lst
..............\........\Button_Dispaly_And_8255.m51
..............\........\Delay.lst
..............\........\Dispaly_And_8255.lst
..............\........\Dispaly_And_8255.m51
..............\........\Init_8255.lst
..............\Objects\Button_8255.obj
..............\.......\Button_Dispaly_And_8255
..............\.......\Button_Dispaly_And_8255.build_log.htm
..............\.......\Button_Dispaly_And_8255.hex
..............\.......\Button_Dispaly_And_8255.lnp
..............\.......\Button_Dispaly_And_8255.obj
..............\.......\Delay.obj
..............\.......\ExtDll.iex
..............\.......\Init_8255.obj
..............\Listings
..............\Objects
8255数码管键盘
程序及电路说明.txt
8255数码管键盘电路\8255数码管键盘电路.pdsprj
..................\8255数码管键盘电路.pdsprj.dear123.Tom.workspace
..................\Backup Of New Project.pdsbak
..................\Last Loaded 8255数码管键盘电路.pdsbak
..................\New Project.pdsprj.dear123.Tom.workspace
8255数码管键盘电路

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