键盘在数码管上显示,8个键盘控制输出8个数据（0～7）。当键盘按下时在数码管上显示你想要得到（0～7）中的数据（要求在同一时刻只允许一个数码管亮）。使用MCU的键盘扫描功能以及LED显示功能。-Keyboard control in the digital display, keypad 8 control output 8 data (0 ~ 7). When pressed at the keyboard LED to show you want to be (0 ~ 7) of the data (requested at the same time only allows a digital tube light). The use of MCU as well as scanning the keyboard LED display.