交通管理与控制系统

8086微机原理实验：8251串行接口、8253计数器、数码管、跑马灯。汇编语言。(8086 microcomputer principle experiment: 8251 serial interface, the 8253 counter, digital tube, Marquee. Assembly language.)

用verilog语言写的简单的键盘扫描代码，适合初学者，用alter的软件编写的程序代码。(Using verilog language to write simple keyboard scan code, suitable for beginners, with alter software program written code.)

VHDL实现的读取和写入SDRAM的程序代码，学习的人可以参考下-VHDL implementation SDRAM read and write program code, can refer to the following study

高精度直流信号源，DAC1220，20位分辨率，双极性输出(High-precision DC source, DAC1220,20 bit resolution, bipolar output)

build a tv box on fpga cyclone 2

说明：  FPGA Verilog控制FLASH片外读写(Verilog Controls FLASH Out-of-Chip Read-Write)

说明：  VC707_MIG_DDR3.sim文件夹中是仿真的文件：testbench和DDR3模型参数 VC707_MIG_DDR3.srcs文件夹中是源文件，包含DDR3的控制、收发模块、顶层文件(VC707_ MIG_ In ddr3.sim folder are simulation files: testbench and DDR3 model parameters VC707_ MIG_ Ddr3.srcs folder is the source file, including DDR3 control, transceiver module, top-level file)

使用nios2点亮一个led灯，使用软件quartus13.0，开发板de2-115(nios2 led quartus13.0 de2-115)

基于fpga状态机的交通灯设计，亮灯时间自己修改，程序简单易懂。(Traffic light design based on FPGA state machine, light time self-modifying, the program is simple and easy to understand.)

高斯最小频移键控（Gaussian Filtered Minimum Shift Keying），这是GSM系统采用的调制方式。数字调制解调技术是数字蜂窝移动通信系统空中接口的重要组成部分。GMSK调制是在MSK（最小频移键控）调制器之前插入高斯低通预调制滤波器这样一种调制方式。GMSK提高了数字移动通信的频谱利用率和通信质量。(Gauss Filtered Minimum Shift Keying is a modulation method used in GSM system. Digital modem technology is an important part of air interface of digital cellular mobile communication system. GMSK modulation is a method of inserting a Gaussian low-pass pre-modulation filter before the MSK (minimum frequency shift keying) modulator. GMSK improves the spectrum utilization and communication quality of digital mobile communication.)