此程序是基于ARM9的，是通过压力传感器控制步定电机的转速，经测试成功的-This program is arm9-based, is through the pressure sensor control step motor speed, the test of success

emmc-test：emmc 压力测试源码，可以直接编译，生成可执行文件。-emmc-test: emmc stress test source code can be compiled directly generate executable file.