通过实例的VHDL程序设计

说明：  verilog语言编写的简单FPGA 的从机模式 spi 通讯(Slave mode SPI communication of FPGA)

实现spi接口的传输，并多外接EEPROM读写数据-Spi interface to achieve the transfer, and multiple external EEPROM read and write data

fpga模拟两路视频，简单拼接后，经过GPIF II接口传出给cy2014，测试usb的吞吐量(fpga generate two lane video, and transmit them through GPIF II interface. test cy2014)

FPGA实现四位数与四位数乘法，有仿真波形，合理利用FPGA资源(Four-digit and four-digit multiplication is realized by using FPGA. It has simulation waveform and makes rational use of the resources of the FPGA.)

：随机脉宽调制是解决交流调速系统 中声学噪声的直接有效方法。随机零矢 量分 布是一种很好 的随 机方法，但其不对称的开关函数使其不适用于传统的电流采样方法。通过仿真表明 PWM周期中点采样的方 法无法得到准确的平均值，在分析不对称模式引起的纹波电流对电流平均值影响的基础上，提出了一种适合 于 RZV分布 的电流采样方法 。仿真结果证实该方法简单可行 。 -: Random pulse width modulation speed control system to solve the exchange of acoustic noise in a direct and effective way. Random zero vector distribution is a good random method, but the asymmetrical switching function so that it does not apply to the traditional current sampling methods. PWM cycle through the simulation shows that the mid-point sampling methods can not be an accurate, on average, the analysis of asymmetric mode ripple current caused by the impact on the current average value based on the proposed distribution of a suitable RZV current sampling methods. The simulation results confirmed that the method is simple and feasible.

该资料为基于FPGA 的NAND flash控制器研究，语言为VHDL，代码已通过仿真验证

Matlab to hdl code for Least_square testbench

this program get 20 point from user and draw functions.

Verilog HDL 高级数字设计源码 _chapter4(Advanced Digital Design Verilog HDL source _chapter4)

基于FPGA的门级逻辑实现快速乘法运算的verilog源程序。-FPGA-based gate-level logic implementation of rapid multiplication of the verilog source.