我自己编写的VB的FFT程序，算法中改进了网上常用算法的一些Bug，并且进行了优化，已经移植到DSP中检验过算法的速度与正确性，测试数据显示效果非常好。-myself prepared by the VB FFT procedure, the algorithm used the Internet to improve the algorithm Bug, and the optimization, which has been ported to the DSP algorithm tests

Full Algorithm of FFT in C language for ARM device. Easy to understand and bug free.

一个圆形的表盘，没用库函数，全是自己写的。直线用的brensenham算法，曲线用的坐标对称，编程的时候挺费劲的。(A circular dial, not using the library function, is all written by himself. The brensenham algorithm used in the straight line, the coordinate symmetry of the curve, is difficult when programm