直接频率合成，Quicklogic提供,部分源文件是Quicklogic 专用文件

四种常用FPGA设计技巧，包括乒乓结构等。-Four kinds of commonly used FPGA design skills, including ping-pong structure.

电子密码锁的相关程序，很好很耐用！但水平有限啊！！(Electronic combination lock procedures， )

十分基础的CCD的测试程序，大家可以下载调试CCD(this is a ccd test chengxu ,it is very good to use ,you can down it )

VHDL Code For Full Adder By Data Flow Modelling

FPGA AD数据采集模块，实现模拟信号到数字信号转换。(FPGA AD data acquisition module, the analog signal to digital signal conversion.)

利用stm32F407实现的等精度测频，可以精确测量频率，误差很小(The equal precision frequency measurement realized by stm32F407 can accurately measure frequency with little error.)

Matlab agc ʵ

通过上翻键和下翻键来设置方波信号正负脉冲宽度，利用一排流水灯来显示按键的次数，通过观察流水灯亮的盏数确定占空比（按一次上翻键亮一盏灯，流水灯全亮时占空比调到了最高或者是最低状态，按一次下翻键灭一盏灯，流水灯全灭时占空比调到了最低或者是最高状态）。(Duty cycle of LED lights and adjustable oscilloscope display code)

HDMI做为视频输出输入接口已经广泛使用很长时间，主要通过TMDS差分编码传输。本实验通过在HDMI屏幕上显示彩条和输入输出环通实验，来练习视频的时序和视频颜色的表示，为后面视频处理实验做个基础。(HDMI as video output input interface has been widely used for a long time, mainly through TMDS differential coding transmission. In this experiment, by displaying color bars and input/output loop experiments on HDMI screen, video timing sequence and video color representation are practiced to lay a foundation for video processing experiments later)

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.)