SC44B0的测试程序，此程序为4*4键盘的测试程序，基于扫描式读取键值并在LED上显示。-SC44B0 testing procedures, the procedures for the 4 * 4 keyboard testing procedures based on scan-read keys on the LED display.

ARM S3C2440的裸机开发实验--按键操作-ARM S3C2440 bare metal experimentation- key operation

这是一个基于S3C2440平台的按键测试实验源码，其要在ADS1.2软件上-This is a key test experiments based on S3C2440 platform source code, to ADS1.2 software