VHDL实现的读取和写入SDRAM的程序代码，学习的人可以参考下

SRAM读写测试，每秒进行一次单字节SRAM读写，使用chipscope观察时序波形(SRAM read and write test, a single byte SRAM read and write every second, using chipscope to observe the timing waveform)

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verilog实现的“BCD/七段译码器”。-verilog implementation " BCD/Seven-Segment Decoder."

1.设计一个具有24进制计时、显示、整点报时、时间设置和闹钟功能的数字钟，要求时钟的最小分辨率时间为1s。2.多功能数字钟系统功能的具体描述如下：     计时：正常工作状态下，每日按24小时计时制计时并显示，蜂鸣器逢整点报时。     校时： 请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

VHDL的初学者可以参考此VHDL加法器，相信会给你带来不小的收获-VHDL beginner can refer to the VHDL adder, I believe will bring you not a small harvest

定时器加数码管显示源码，以及test bench测试模块源码，经modelsim仿真结果正确(Timer plus digital display source code, and test bench test module source code, by modelsim simulation results are correct)

FPGA实现FFT算法的源代码及工程文件，此工程为ISE工程项目。有详细的说明，可以运行。(FPGA Implementation of FFT algorithm source code and project files, this works for the ISE project. There are detailed instructions, you can run.)

Actel双端口存储；通过串口发送数据初始化RAM，然后通过串口返回到上位机的串口调试程序显示(通过串口发送数据初始化RAM，然后通过串口返回到上位机的串口调试程序显示)

基于DDS的信号源设计（包括三角波、正弦波、方波）(Design of signal source based on DDS)

VHDL,简易音频数字相位表的设计与实现 数字相位测量仪在工业领域中经常用到的一般测量工具，主要应用与同频率正弦信号间的相位差的测量显示。 本系统采用FPGA实现测量的核心部分，主要由数字鉴相、累加计数器、控制器以及寄存与显示译码电路组成。该系统硬件电路简单，整个系统采用硬件描述语言VHDL作为系统内部硬件结构的描述手段，在XILINX公司的ISE9.1的软件支持下完成。可以对20Hz~20kHz频率范围内的音频信号进行采样鉴相处理，并将数据传回FPGA进行相位差计数累加、测量运算，最后送显示译码电路显示，测相范围为 ，相位测量误差 < 。 经测试结果验证，本系统充分利用FPGA对数据的高速处理能力，是系统设计高效、可靠，处理速度快，稳定性高，易于实现。 (VHDL, simple audio digital phase Table Design and Implementation of the digital phase meter general measurement tools are often used in the industrial field, the measurement of the phase difference between the main application with the same frequency sinusoidal signal. The system uses the FPGA implementation of the core part of the measurement, mainly by the digital phase, cumulative counter, the decoding circuit of the controller as well as storage and display. The system hardware circuit is simple, and the entire system using hardware description language VHDL system means a description of the internal hardware structure, completed in the XILINX company ISE9.1 software support. The audio signal in the frequency range of 20Hz ~ 20kHz sampling KAM-phase process, and the data returned FPGA retardation counted accumulation measuring operation, and finally sent to the decoding circuit, the scope of the measurement phase, the phase measurement error < . The test results verify the full u)