16位乘法器

本设计是基于FPGA设计一个地铁自动售票系统。 本设计采用自顶向下的模块化设计方法，基于FPGA使用VHDL语言设计制作一个地铁自动售票控制系统，该系统能出售2条线路3种不同价位的票，完成售票、找零、显示等功能。(The design is based FPGA design of a subway ticket vending system. This design uses a top-down, modular design method, a subway ticket vending control system based on FPGA using VHDL language design, the system can sell two lines of different priced tickets, complete the ticket, give change, display and other functions .)

说明：  Simple UART for FPGA is UART (Universal Asynchronous Receiver & Transmitter) controller for serial communication with an FPGA. The UART controller was implemented using VHDL 93 and is applicable to any FPGA. Simple UART for FPGA requires: 1 start bit, 8 data bits, 1 stop bit! The UART controller was simulated and tested in hardware.

按键控制LED流水灯；按键1按下前8个灯从左到右依次点亮，按键2按下中间前8个灯从左到右依次点亮，按键3按下所有灯全亮(Water control button LED lights sequentially lit buttons the eight lights left to right 1 Press button 2 press from left to right is lit in the middle eight lights, key 3 Press All full bright light)

QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的L&R法(QPSK-carrier frequence offset estimation_ L&R)

statemachine project for my school

基于FPGA器件的DDS设计实现中的一个核心部分就是波形存储表的设计。首先采用LPM_ROM和 VHDL选择语句这两种方法进行波形存储表的设计和比较分析 然后考虑到硬件资源的有限性及DDS的精度要 求,对这两种方法的程序进行了优化 最后对这两种方法设计的程序进行仿真和硬件调试。结果表明:采用这两种 方法都能有效地实现DDS中波形存储表的设计。 (DDS-based FPGA devices designed to achieve one of the core of the waveform is stored in table design. First of all, choose to adopt LPM_ROM and VHDL statements of these two methods for the design waveform storage tables and comparative analysis and then, taking into account the limited hardware resources and the accuracy of DDS, the two methods to optimize the process the last of these two methods of process design simulation and hardware debugging. The results showed that: the use of these two methods are all effective ways to achieve the DDS waveform stored in the table design.)

Array muiltiplier verilog code.. 4 bit two inputs with 8 bit outputs

一种简单的 verilog 代码为 full_adder 的。它是在模拟器和 xilinx spartan3E fpga 板测试。

基于DSP28335的产生ADc采样的程序(Program for generating ADC sampling based on DSP28335)

RS（255，223）编码器，已实际运用到产品中(RS (255,223) encoder has actually applied to products)