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说明：  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.)

RGB vga driver for manipulating the colours of a given image buffer. The code has beeen written in vhdl

实现dsp与fpga的emif的verilog异步实现，可实现异步读写以及相应功能模块控制，文件中包含仿真后的波形图形以及仿真测试程序，运行环境quartus ii11.0，仿真环境mmodelsim se 6.5d(Achieve dsp and fpga verilog asynchronous implementation of the emif, enabling asynchronous reading and writing as well as the corresponding function module control, the document contains graphics, and after the simulation waveform simulation testing procedures, operating environment quartus ii11.0, simulation environment mmodelsim se 6.5d)

这是一个基于Quartus2 开发环境的4输入加法器( 4adder basic on Quartus2)

spi driver: Analog Device DAC ad9788 SPI Controller

：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.

Verilog实现的VGA程序，用ISE打开工程文件即可-Verilog implementation VGA program, open the project file with the ISE can be

VHDL版的C8051核(C8051).evatronix公司的IP核-VHDL version of the C8051 core (C8051). Evatronix company s IP core

RAM读写控制器，用verilog实现的简单易懂的RAMROMsram控制核-Controller RAM read and write, using verilog implementation of easy-to-understand control of nuclear RAMROMsram

《CPLDFPGA嵌入式应用开发技术白金手册》源代码，涉及FPGA/CPLD的各个方面，键盘扫描，LED扫描等简单程序及滤波器等的设计(" CPLDFPGA platinum embedded application development technology handbook" source code, related to FPGA/CPLD all aspects of the keyboard scanning, LED scanning filters, such as simple procedures and design)