source code for 4x4 keypad interfaced to 89c61x2 keil uvision

　　矩阵键盘控制，C语言写的51单片机源代码，包括4X4矩阵键盘(查表法)、4x4矩阵键盘实验(计算法)、矩阵键盘按键键值显示程序、矩阵键盘模拟电子-: VC/C++ source code, and other categories, single-chip control matrix keyboard control, C language source code written in 51 single-chip, including the 4X4 matrix keyboard