FIFO的verilog程序

adc器件ads62p49配置代码，已在工程中验证可用(Temperature sensor DS18B20 parses the code, has verified the ADC device configuration code, has been verified available)

Xilinx,Altera,ARM,AVR,S52,Lattice等系列FPGA的下载线电路图和PCB(Xilinx, Altera, ARM, AVR, S52, Lattice series FPGA download cable circuit diagram and PCB)

this is "AND" gate implementation in VHDL

讲述4ASK的原理并附有matlab调制解调的源码。。。。。。。。。。 注：原来上传的4ASKmod.zip不要下(The principle tells 4ASK together with modulation and demodulation matlab source. . . . . . . . . . Note: The original upload 4ASKmod.zip not down)

说明：  实现简单的硬件加法器、除法器，实现源码文中注释(Realize simple hardware adder and divider, realize source code)

本代码是模数转换器ADC的驱动的verilog HDL代码，对需要做ADC课题的朋友写ADC的驱动程序很有帮助，代码简单易读并且适用于绝大多数ADC，希望我写的代码能够给予您帮助

axi slave 模型，verilog描述，自己可以根据自己的设计适当修改。基本功能可能存在bug，不过是模型，大家可以自己稍作修改。

Example of programming fifo in c

载波同步，costas环，基于Verilog的载波同步环(Carrier synchronization, costas ring, based on Verilog carrier synchronization ring )

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)