xilinx of ddr sdram controller documentation

基于FPGA实现IIR滤波器的程序，用VERILOG编程语言实现(The program based on the FPGA implementation of the IIR filter is implemented in the VERILOG programming language)

这是一个LCD1602底层驱动代码，TI公司LM3S系列的(This is a LCD1602 underlying driver code, TI company LM3S series)

SOPC软件编程基础，用实例讲解，非常适合初学者。-SOPC software programming foundation, using examples to explain, very suitable for beginners.

MAX+plus II编译的模30加法计数器，简单的与非门组成！-MAX+ Plus II compiler module adder 30 counters, a simple composition with the non-door!

VHDL编写的数字钟，在Q-ii下编译，实现闹铃设置与定时闹铃，分时秒显示-VHDL prepared digital clock, in the Q-ii under the compiler to achieve regular alarm and alarm settings, time-seconds display

说明：  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.)

yong VerilogHDL yu yan bianxie de pinlv fa sheng qi,shi yong ISE ruan jian da kai.-Used VerilogHDL to make a frequency builder.

FPGA经验总结：时序是设计出来的 我们在做详细设计的时候，对于一些信号的时序肯定会做一些调整的，但是这种时序的调整最多只能波及到本一级模块，而不能影响到整个设计。(FPGA Experience: Timing is designed to do the detailed design of our time, for some signal timing will certainly make some adjustments, but adjust this timing can only spread to up to this level of the module, but not affect the whole design.)

this project is based on 2*1 and 4*1 multiplexer and 1*2 and 1*4 demultiplexer using vhdl.this is the 100 correct code,reference is taken from book digital electrionics written by anand kumar.please use quatrus to access this code.this code can be used for the final year project for engineering. Here dataflow techniques and behavioural

应用背景通用模块，以产生可重构的源时钟频率的传输速率。该模块可用于UART，自定义串口协议等。提供一个时钟发生器模块产生可选 ；-波特利率和；——时钟源（可选择分因素） ；还产生接收 ；——时钟的16倍，8倍，倍，倍的传输波特率 ；关键技术UART，VHDL，FPGA，CPLD programmanle逻辑器件。设备无关的代码