电子琴程序可以在单片机基础上开发一款自己的电子琴-Keyboard program can develop a microcontroller based on its own keyboard

键盘程序设计，关于pic单片机与矩阵键盘，要使用结合相关功能进行修改-The keyboard program，About the PIC microcontroller and matrix keyboard, modified to use in combination with related function

51单片机的一些实验设计，led灯的点亮，键盘扫描，蜂鸣器等-51 microcontroller design some experiments, led lamp lighting, keyboard scanning, buzzer, etc.