这是基于at91rm9200开发板的4个uboot源码，大家可以作为参考学习。-This is based on the development board at91rm9200 the uboot source code, we can learn as a reference.

FFT算法的实现，简单易懂 ，是新手学习的好例子，检验可用。-FFT algorithm, easy to understand, is a good example of novice learning, testing is available.