VHDL程序讲解FIFO与RAM和ROM的数据交换

the interface design of pcie based on FPGA

本文介绍一种波导双模双带滤波器的设计方法。(This paper presents a new class of dual-mode dualband filters in which each polarization is dedicated to a selected band. The equivalent circuit is a parallel combination of two inline networks that represent each polarization. A transmission zero is generated between the two bands by properly adjusting the relative orientations of the input and output coupling apertures.)

代码是一个复数乘法器，两个复数相乘，只用到了2个实数相乘，运算量少(Code is a complex multiplier, two complex multiplication, uses only real number multiplied by 2, operations less)

布尔乘法器带testbench好用的工程啊(Boolean multiplier works with testbench nice ah)

用FPGA于32进行SPI单向通信，FPGA向32放松发送数据(One-way SPI communication is carried out in 32 with FPGA, and data is sent to 32 with ease by FPGA.)

说明：  2018全国大学生FPGA创新设计大赛南京总决赛封闭测试题目，以及自己编写的verilog和testbench，欢迎学习借鉴(The closed test topic of the 2018 National Undergraduate FPGA innovation design competition Nanjing finals, as well as Verilog and testbench compiled by ourselves, are welcome to learn)

该程序用来实现电话计时以算取费用，比较简单(telephone cost metering verilog code)

IIC主设备的代码实现（verilog),从设备模型-IIC main equipment of the code (verilog), from the device model

我自己当初用来求解arctan 暂时没有搞成ip形式 搞好了还要传git 这个代码还没有搞好，因为急需要下载东西 如果感兴趣可以联系我 邮件(this is a not full wrappered code very crude use chebyshev to caculate arctan function i m urgent to download a model from pudn so i do this.)

VHDL USB2.0接口源码,内有说明,详细.-VHDL USB2.0 interface source code, which is described in detail.