I will record the process of implementing the USB virtual serial port on the Zhengdian Atom F429 Apollo development board, hoping to help others who want to learn USB.First, I updated the source code
1 About Fourier TransformThe Fourier transform is such a magical transform, its basic principles and applications are everywhere in textbooks and on the Internet, so I will not go into details here to
The negative feedback amplifier circuit can be divided into voltage feedback and current feedback from the sampling method of the output end, and can be divided into series feedback and parallel feedb