说明：  ARM9-TQ2440 一些循序渐进的例程，让刚刚开始接触ARM9 的朋友只要按照步骤操作就可以去实现相应的实验效果，
(ARM9-TQ2440 some of the routine step by step, so just starting out with a friend as long as the ARM9 can follow the steps to achieve the corresponding experimental results,)