VHDL language design stopwatch, timer function of the realization, the realizati...

fpga的一个小程序用于3s500e 4*4键盘模块(fpga is a small program used 3s500e 4* 4 keyboard module)

6通道正弦波发生器，产生频率，相位，幅值都可调的正弦波形-6-channel sine wave generator, resulting in frequency, phase, amplitude of the sinusoidal waveform are adjustable

USB设备接口的驱动程序，采用verilogHDL语言编写，并包含相关说明资料(USB device driver interface, using verilogHDL language, and contains descriptive information)

本程序实现不同频率时钟的产生及其相互转化-this program different clock frequencies to the formation and transformation

直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)

这是一个FIFO_Buffer的verilog代码.(This is a FIFO_Buffer the Verilog code.)

基于 hdl语言的re232通信实验的设计，程序简单明了，一学就会(rs232 communication)

本文介绍了汉明编码与译码通过FPGA器件来实现，介绍了使用VHDL语言编程的基本算法！-This article describes the Hamming encoding and decoding through the FPGA device to implement, introduced the use of VHDL programming language is the basic algorithm!

Great guide for writing VHDL

sdh帧同步，实现sdh帧搜索，预同步，同步，保护等各态的功能(SDH frame synchronization SDH frame search, pre-sync, synchronization, protection, the function of each state)