新型的按键扫描程序，这种按键处理办法的便捷和高效，你可以移植到任何一种嵌入式处理器上面，因为C语言强大的可移植性，你可以在MCS-51，AVR，PIC，甚至是ARM平台上面测试这个程序性能。(The new button scanning program, which is convenient and efficient, can be ported to any of the embedded processors. Because of the portability of the C l