浮点乘法

VHDL TESTBENCH书写规范，对学习FPGA的同学很有帮助，掌握仿真语言书写规范。(VHDL TESTBENCH description of the norms, the students learn FPGA helpful, master the language of simulation techniques)

说明：  CC217编程序，verilog实现，串行输入串行输出(CC 217 program, to achieve Verilog, serial input serial output)

Quartus环境下使用Verilog编写的HDB3编解码程序，RTL和时序仿真已过(Quartus under the environment of a HDB3 protocol procedures written in Verilog, RTL and timing simulation has be passed)

利用FPGA实现对外设按键的控制，例如用户库用按键控制跑马灯的效果(FPGA is used to realize the control of external keys, such as the effect of user database using keys to control the running horse lamp)

说明：  实现AHB转SRAM接口实现，支持猝发，零等待延迟(Implementation of AHB to SRAM Interface)

这个是我自己写的LCD1602的代码，经过测试可以再LCD1602上正常运行，由于自己的板子是4线制的，所以通过4线制来通信，对于知道8线数据位编程的同学，不妨试试4线数据位怎么编写

FPGA实现FFT算法的源代码及工程文件，此工程为ISE工程项目。有详细的说明，可以运行。(FPGA Implementation of FFT algorithm source code and project files, this works for the ISE project. There are detailed instructions, you can run.)

pll(phase locked loop) is used to fix the circuit to particular frequency

说明：  对片内RAM进行读写操作，通过数据的写入和读出，对RAM的操作进行熟悉。(Read and write ram on chip, and get familiar with RAM operation through data writing and reading.)

说明：  基于fpga的ad采样程序 可控制ad9226对信号进行采样(Ad9226 signal sampling can be controlled by ad9226 sampling program based on FPGA)