按键和lcd1602的C51程序，当按下某一个键时，在lcd上显示所按下键的键值。-Lcd1602 button and the C51 process, when the press of a button, the lcd display in the key by pressing the keys.

c51单片机驱动LCD1602的显示程序，可以用keilC调试-Single-chip driver c51 procedures LCD1602 display can be used to debug keilC