这是一个简单的除法器（32bit/16bit),采用移位相减法

usb 和VGA接口FPGA程序，主控芯片为xilinx公司的SP3e系列的500E芯片，VHD语言编写，工程文件，可以直接用ISE打开

it has 6 packages of 8051 sources,including source code(VHDL and Verilog),dc scripts, pdfs, netlists etc. and a MIPS IP package

主要是RS-232串行接口技术并且通过了串行收发器UART的开发实例演示了接口设计的基本步骤程序-Is RS-232 serial interface technology and, through a serial UART transceiver development of interface design examples demonstrate the basic steps of the procedure

这是我准备电子设计大赛时，用VHDL写的一个自动打铃系统，很好的学习资料。-This is when I am going to Electronic Design Contest, use VHDL to write an automatic bell playing system, a very good learning materials.

ALTERA NIOS处理器，VHDL语言在QUARTUS编译通过，然后有C语言在NIOS SHELL下驱动，实验音频解码-Altera NIOS processor, the QUARTUS VHDL compiler, then the C language under NIOS SHELL-driven, experimental audio decoder

说明：  1、能正确显示输入信号频率； 2、测量频率范围为1Hz ~ 999999Hz； 3、测量结果以十进制数字显示； 4、能测量幅值较小的信号频率； 5、有自动刷新输出数据的功能（如5s刷新一次）； 6、有自检模块（如产生100Hz的校准方波）；(1. It can correctly display the input signal frequency; 2. The frequency range of measurement is 1Hz ~ 99999hz; 3. The measurement results are displayed in decimal; 4. It can measure signal frequency with small amplitude; 5. It has the function of automatically refreshing the output data (e.g. once in 5S); 6. Self checking module (such as generating 100Hz calibration square wave);)

agilex fpga description

HDLC控制器源码，包括单独HDLC的Tx端和Rx端实现，以及顶层带FIFO和Wishbone总线控制器的实现，通过Wishbone可方便与CPU连接，通过软件控制整个HDLC控制器的工作。

使用VHDL编写语言，巧妙的利用计数器和循环输出一个坐标系，由于VHDL出现负数比较麻烦，全部由正数代替，输出一个原点在中心，半径128的256×256的坐标。方便坐标变换以及用此坐标做算法。(Use of VHDL language, clever use of counter and loop outputs a coordinate system, because VHDL negative too much trouble, all replaced by a positive number, the output an origin at the center, radius 128 256 256 coordinates. Convenient coordinate transformation and coordinate to do with this algorithm.)

A quick and simple Spartan 3 tutorial