1)　　设计一个秒表

2)　　熟悉掌握ARM中的程序应用，将理论结合实际

3)　　通过本次实验，将以前学的进行结合使用，以检验自己的学习质量

4)　　更加熟练了ARM的实验环境

-1) design a stopwatch 2) familiar with ARM in the program application, will integrate theory with practice 3) The experiment will be combined with previously learned to test their quality of learning 4) more skilled experimental environment of the ARM