采用硬件描述语言Verilog HDL实现人回答功能，H.

xc3s400芯片详细的英文资料，xc3s400的FPGA开发板使用者必看-chip xc3s400 detailed information in English, xc3s400 the FPGA development board users see

DDR（双速率）SDRAM控制器参考设计verilog代码，可以直接用的，很好的-DDR (double rate) SDRAM controller reference design Verilog code, can be directly used, very good

说明：  FPGA应用状态机版，适合初学者学习状态机三段式，ASMD图的理解和翻译，以及Verilog语言的应用 最后对仿真的一些理解 其中包含HDL设计及testbench描述 根据要求设计了一个能求出一个32bit字中两个相邻0之间最大间隙的电路。(FPGA application state machine version, suitable for beginners to learn state machine three-stage, ASMD chart understanding and translation, and Verilog language application. Finally, some understanding of simulation, including HDL design and testbench description According to the requirements, a circuit is designed to find the maximum gap between two adjacent zeros in a 32 bit word.)

cpld/fpga常用加法器设计的verilog程序-cpld/fpga common adder Verilog design procedures

利用FPGA内核产生SPWM波，并且频率可调(The FPGA kernel is used to generate SPWM waves, and the frequency is adjustable)

VHDL code comparator

1553B总线BC端的编程例子，做通了对于一个RT的测试。对于其他的RT测试和程序的例子原理相同。(The BC end of the 1553B bus programming examples)

说明：  BUS documentation and map reffereces

主要给出准循环的LDPC码编码实现方法，译码方法选择，并给出了帧同步的解决方法(Give the main quasi-cyclic LDPC codes achieve coding method, decoding method of selection, and give the frame synchronization solution)

说明：  CPU设计，包含基本的指令集，能执行简单的程序。考虑了CPU，寄存器，存储器和指令集之间的关系。即读写寄存器，读写存储器和执行指令。(CPU design, including basic instruction set, to execute a simple program. Consider the CPU, registers, memory, and the relationship between instruction sets. That read and write registers, read and write memory and execution.)