用VHDL语言编写的代码，以供大家学习和交流，方便大家学习！...

control stepper motor by fpga card with vhdl program

最近组长给分配的任务，这几天一直在做，比较郁闷的是用的器件是XC400XL系列的，只有ISE4.1支持，用惯了7.1i的我还是要适应一阵子（关键4.1是一个试用版的）。挺折腾的，不说了，放上顶层模块：-。。。

简单uart，verilog语言编写，已经经过测试，有需要的可以看看(Simple uart, Verilog language, has been tested, you can see if you need it)

FPGA的仿真实例，Verilog代码编写，过程详尽，代码易懂。第二个文档-FPGA simulation examples, Verilog coding, the process in detail, code easy to understand. The second document

verilog仿真硬件的工具qiartus2的使用教程,内容简单易懂,初学必备(Verilog simulation tool for hardware qiartus2 the use of tutorials, easy-to-read content, learning essential)

fpga的RS485代码,非常容易，适合学习(the code of rs485 in fpga, very easy,suitable for learning)

FPGA测试程序，仅供测试硬件是否能够运行，主要功能是点亮运行指示灯(The main function of the test program of FPGA is to light the running indicator.)

基于FPGA控制的DDS波形发生器，可在Cyclone IV系列板子上使用，已经过仿真验证(Based FPGA control DDS waveform generator in Cyclone IV series board on use, has been simulation)

5604FPGA驱动，能显示数字（5604里面为4个595）(5604 FPGA driver, able to display digital (5604 contains 4 595))

本源码是用Verilog编写的12位移位相加乘法器的设计源码，开发软件为MAX+PLUS，已经测试通过。(The Verilog source code is written in the sum of 12-bit shift multiplier design source code, developing software for the MAX+ PLUS, has been tested.)