可实现找钱功能的自动售邮票机，可买两种邮票，一元的和五角的...

This is the source code for I2C(Inter Integreted Circuit) which is used in serial communication

Xilinx 的DDR SDRAM控制器，用Verilog HDL描述- A DDR SDRAM contraller sample descripte in Verilog HDL ,base on Xilinx FPGA

数字时钟6位数码管显示。主要器件为74ls48和74ls160 /74ls161。功能：1.显示时、分、秒。2. 可以24小时制或12小时制。3. 具有校时功能(Digital clock six digital tube display. Main components of 74ls48 and 74ls160/74ls161. Features: 1. Shows hours, minutes, seconds. (2) a 24-hour or 12-hour clock. 3 a school function)

用VERILOG实现一个被除数为8位、除数为4位的高效除法器(With VERILOG implement a dividend for the 8-bit, 4-bit effective divisor divider)

以太网PHY层中的组成部分 8B10B编码器(Part of the Ethernet PHY layer in 8B10B encoder )

misp，五级流水源码，实现一个建议的cpu(Misp, five-stage flow source code, implementation of a recommended CPU)

利用VHDL实现CPLD（EPM240T100C5）的VGA屏幕输出-Using VHDL realize CPLD (EPM240T100C5) output of the VGA screen

VHDL实现 DDS。大家共享吧，一起学习，一起进步(VHDL realize DDS. U.S. to share it with learning, with progress)

说明：  功能是（用Verilog语言的，内有比较详细的注释）： （1）计数器的功能是从0到9999计数，并能以十进制数的形式在七段数码管上显示出来(包括七段数码管显示模块). （2）该计数器有一个1个nclr和一个adj_plus端，在控制信号的作用下（见下表），计数器具有复位、增或减计数、暂停的功能。编写以上的程序的完整模块. 计数器的功能表 nclr adj_minus 功 能 0 0 复位为0 0 1 递增计数 1 0 递减计数 1 1 暂停计数 (Function is (with Verilog language, the more detailed comments): (1) counter function is from 0 to 9999 counts, and are able to form a decimal number on the seven-segment LED display (including the seven-segment LED display module). (2) The counter has a one nclr and a adj_plus side, under the action of the control signal (see below), the counter has reset, increase or decrease of count pause function. Complete the preparation of the above program modules. Counter function menu nclr adj_minus reset 0 0 0 0 1 1 0 counts counting suspended Count 1 1)

说明：  电子工程师学习的最好的学习资料，能够了解电子设计必学软件资料。建议珍藏，电子设计初学者必备(Electronic engineers to learn the best learning materials, to understand the electronic design will learn software data. Recommended collection, electronic design for beginners)