99记数VHDL的源程序,综合实验指导书上的,可以用的 大家下载哦...

基于FPGA器件的DDS设计实现中的一个核心部分就是波形存储表的设计。首先采用LPM_ROM和 VHDL选择语句这两种方法进行波形存储表的设计和比较分析 然后考虑到硬件资源的有限性及DDS的精度要 求,对这两种方法的程序进行了优化 最后对这两种方法设计的程序进行仿真和硬件调试。结果表明:采用这两种 方法都能有效地实现DDS中波形存储表的设计。 (DDS-based FPGA devices designed to achieve one of the core of the waveform is stored in table design. First of all, choose to adopt LPM_ROM and VHDL statements of these two methods for the design waveform storage tables and comparative analysis and then, taking into account the limited hardware resources and the accuracy of DDS, the two methods to optimize the process the last of these two methods of process design simulation and hardware debugging. The results showed that: the use of these two methods are all effective ways to achieve the DDS waveform stored in the table design.)

本书是一本Verilog语言设计和综合手册,对学习Verilog语言有很大作用,值得阅读.

很有用的10bit串并转换verilog程序，需要的可以拿去参考下，在quartusII上已验证过(Useful 10bit string and convert verilog program, need to take a reference, has been verified in quartusII)

本人收集的多个VHDL语言编写的正弦波发生器以及SPWM程序。(I collected multiple VHDL language of sine wave generator SPWM program.)

基于fpga和sopc的用VHDL语言编写的EDA的32位Nios CPU嵌入式系统及其DMA设计俄罗斯方块游戏机(FPGA and SOPC based on the use of VHDL language EDA 32-bit Nios CPU and the DMA design of embedded systems Tetris game)

这是由阿龙利开发的程序，以控制ADC08D1000模拟 - 数字设备中的FPGA，赛灵思的Virtex-4 SX35 FPGA此处应用，DCM的用于控制FPGA中的时钟路径，所述时钟源是AD9517该PLC控制的FPGA中的串行端口

Implementarea unui comparator pe 1 bit

数控分频器的设计数控分频器的功能就是当在输入端给定不同输入数据时，将对输入的时钟信号有不同的分频比，数控分频器就是用计数值可并行预置的加法计数器设计完成的，方法是将计数溢出位与预置数加载输入信号相接即可。-NC NC divider divider design of its function is when the input given different input data, input the clock signal will have different sub-frequency ratio, NC prescaler value can be used include parallel preset counter adder design is completed, the method is to count the number of overflow bit with preset load to the input signal phase.

说明：  数字钟通过verilog实现，并且支持Modelsim仿真，通过实验验证(The digital clock is implemented by Verilog and supports Modelsim simulation)

Xilinx的FPGA开发DEMO例程，功能相对来说比较全面，适合新手参考。-Xilinx FPGA development DEMO routines, function relatively comprehensive reference suitable for novice.