说明：  主要实现了在MSP430单片机上4*4键盘的编程设计，为其单片机键控功能开发打下基础，很好地理解了他的设计，对于后续更多程序加入打下基础。
(The main achievement of the programming MSP430 MCU 4* 4 keyboard design, and lay a foundation for its development of microcontroller keying function, and a good understanding of his design, to join lay the foundation for the subsequent more procedures.)