Implementation of CORDIC atan block in VHDL

基于VHDL语言的串口发送和接收程序,自己调试通过，并已经运用在工程中(Based on the serial port to send and receive procedures VHDL language, its own debugging, and has been used in the project)

FFT implementation using C program

时钟分频代码，PWM产生 RTL 源代码。(clock divider，PWM generator RTL Source Code)

在FPGA开发平台上，通过按键控制一个弹球小游戏。输出VGA显示信号输送到显示器上显示(On the FPGA development platform button control of a pinball game. VGA output signal is supplied to the display displayed on the display)

sigmoid函数硬件实现，verilog代码及其测试用例(Sigmoid function hardware implementation, verilog code and test cases)

DDR（双速率）SDRAM控制器参考设计，xilinx提供-DDR (double data rate) SDRAM controller reference design for Xilinx

基于FPGA的PWM控制器设计，包含ADC0820模块，按键扫描，PID，PWM控制器等模块，VHDL语言完成，已仿真通过(PWM controller design based on FPGA, including ADC0820 module, key scan, PID, PWM controllers and other modules, VHDL language completed, through simulation)

说明：  关于地铁售票的一些功能 基于自动买票的VHDL设计程序 比较经典(Subway ticket on some of the features of the VHDL-based auto-buying classic design procedure)

:针对现场可编程门阵列(FPGA)芯片的特点,研究FPGA中双向端口I/O的设计,同时给 出仿真初始化双向端口I/O的方法。采用这种双向端口的设计方法,选用Xilinx的Spartan2E芯片 设计一个多通道图像信号处理系统。-: For field programmable gate array (FPGA) chip features of FPGA in the bi-directional port I/O design, the simulation is initialized at the same time two-way port I/O method. Using this design method of two-way ports, optional Spartan2E the Xilinx chip to design a multi-channel image signal processing system.