lab16-EXRAM

代码说明：

说明：  该实验程序先向外部 SRAM 写入数据再读出，每一个存储空间逐一比较是否正确，如果一致说明没有问题，最后才写入自然数。(The experimental program first writes data to external SRAM and then reads it out. Each storage space compares correctly one by one. If there is no problem, the natural number will be written in the end.)