大屏幕led点阵显示的驱动时序。 使用vhdl语言描述。其中rom文件可以使用lpm_megcore自动生成。...

说明：  LDPC码的FPGA实现，用verilog语言编写(FPGA implementation of LDPC code, written in Verilog language)

用全加器设计8位运算器逻辑电路图 2、根据逻辑电路用 VHDL编程实现 3、调试编译通过后，仿真 (this file can help you learn the design of cpu)

spartanII 是xilinx公司提供的一款高性能FGPA芯片,本文详细介绍spartanII的体系结构和编程!-spartanII Xilinx is provided by a high-performance chip FGPA, spartanII This paper describes the architecture and programming!

VHDL开发环境，电梯控制系统，实现电梯的上下传送控制。-VHDL development environment, elevator control system, transmission control up and down elevators.

基于FPGA的Verilog语言实现的六十进制计数器(FPGA-based Verilog language implementation of six decimal counter)

SPI接口协议，将spi总线转换成为LOCALBUS总线(SPI interface protocol, the spi bus converted into LOCAL BUS bus)

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)

建立了单相的PWM整流器电路闭环控制的仿真模型。版本R2007(The simulation model of the closed-loop control of single-phase PWM rectifier circuit. Version R2007)

its the vhdl stuff for ddr sdram controller nice one easily understandable

说明：  4位加法器，4位数字相加及进位功能的实现，主要利用Verilog语言实现，简单轻松，且代码量少(a adder which can realize 4 bit numbers adding)