NAND flash实现ECC

曼彻斯特编码技术用电压的变化表示0和1。规定在每个码元中间发生跳变。高→ 低的跳变表示0，低→ 高的跳变表示为1。每个码元中间都要发生跳变，接收端可将此变化提取出来作为同步信号，使接收端的时钟与发送设备的时钟保持一致-Manchester coding techniques that use voltage changes in 0 and 1. Provisions in the middle of each symbol hopping happen. High → low hopping express 0, low → high jump for the express one. Symbol between each transition must happen, this change in the receiver can be extracted as a synchronization signal to the receiving end of the clock and send the equipment to maintain the same clock

此代码帮助您在spartan系列fpga上设计交通灯控制器，并使用FSM模型进行设计，使设计更简单，也更易于理解；

说明：  通过SPI接口实现FPGA和MCP2515独立CAN芯片通信，功能使用modelsim仿真，实现了配置、接收、发送功能。(The communication between FPGA and MCP2515 independent can chip is realized by SPI interface. The function is simulated by Modelsim, and the function of configuration, receiving and sending is realized.)

说明：  ddr2原理图设计，原厂电路图设计，很好很强大 16bit(ddr2 schematic design, the original schematic design, a very powerful 16bit)

（1）距离算法研究和设计； （2）采用FPGA/CPLD实现。 -(1) distance algorithm and design (2) using FPGA/CPLD implementation.

verilog hdl教程135例:verilog hdl语言类似于C语言，便于学习。本文档带有源代码，3-6章-Verilog HDL 135 cases Guide : Verilog HDL language similar to the C language, to facilitate learning. This document with the source code, 3-6

本程序设计一个基于FPGA的4相步进电机定位控制系统。由步进电机方向设定电路模块、步进电机步进移动与定位控制模块和编码输出模块构成。前两个模块完成电机旋转方向设定，激磁方式设定和定位角度的换算等工作，后一个模块用于对换算后的角度量编码输出。-This procedure to design an FPGA-based 4-phase stepper motor positioning control system. Direction set by the stepper motor circuit module, stepper motor stepper movement and positioning control module and the code output modules. The first two modules complete the motor rotation direction setting, exciting way of setting the angle and positioning of the conversion work, after a module for the point of view of the volume of converted output encoding.

基于VHDL开发的自动售货机系统，可实现自动售货过程中的基本功能，具有一定的代表性。-VHDL-based development of a vending machine system which can automatically process the basic functions of sales, with a certain representativeness.

在QuartusII运用ＡＨＤＬ语言，首先设计出PN发生器来产生一个11位的数据流在整个周期内有效数据有 =2047位；再设计状态机用来检测串行数据流中的序列。运用两个个计数器分别对PN码计数以及序列出现的次数计数。改变ＰＮ码结构可以作为通用数列检测器-QuartusII use in AHDL language, the first PN generator designed to generate a data stream 11 throughout the cycle has an effective data = 2047 re-designing the state machine used to detect the serial data stream in sequence. The use of two counters were counting on the PN code, as well as counting the number of sequences occur. Changes in the structure of PN code series can be used as general-purpose detector

完整的TPC编译码VHDL程序，直接就可以运行(TPC encoder and decoder)