修改CPU频率的代码.

该程序模块中xllp_CPUfreq.s，xllp_freq.c，xllp_intc.s，xllp_freq.h四个文件是修改CPU频率的主要代码，使用前可以将这些文件和xllp目录下的文件编译在一起，以便可以在程序的任何地方调用它们，修改和读取CPU频率主要依靠调用xllp_freq.c文件中的两个函数完成：XLLPSetCoreRunFrequency，xllpGetCurrentFreqSetting。

　　其余代码只是一个调用这两个函数的一个例子，也可以自己重新写一个。

如果为了简便，可以将所有的文件当作一个驱动程序在同一个目录下编译，然后以流驱动的方式加载，再用应用程序控制。

-The program module xllp_CPUfreq.s, xllp_freq.c, xllp_intc.s, xllp_freq.h four documents is to modify the main CPU frequency code before they can be used xllp directory files and compiled files together so that you can program call them from anywhere, modify, and read the CPU frequency mainly rely on call xllp_freq.c document the completion of two functions: XLLPSetCoreRunFrequency, xllpGetCurrentFreqSetting. The remaining code is just a call to an example of these two functions, you can re-write one himself. If the sake of simplicity, all files can be used as a driver in the same directory to compile and then load the stream-driven manner, and then application control.