行列键盘的学习是单片机学习的必经之路，可是对了初学者来说学习起来并

不容易。书上的资料不多，或是说明不细，抑或太复杂不易理解。我在学行列键

盘时也有过此类的问题，近日我发现了一个非常好的行列扫描的方式——线反转

法行列键盘扫描，它简单易懂，非常适合初学者学习，也可作为程序开发之用。-ranks keyboard of learning is a must to learn microcontroller, but to a newcomer learning together is not easy. The book did not have much information, or explain the detailed, too complex or difficult to understand. In my school ranks at the keyboard and had such problems, Recently, I found a very good way of scanning the ranks -- line reversal method ranks keyboard scan, it is simple to understand, very suitable for beginners to learn, as well as program development purposes.