xilinx 开发板原程序，双口RAM控制

altera公司飓风四代芯片，LCD屏幕彩条显示，有效实现行、场扫描。练习FPGA驱动VGA或LCD显示的入门程序(Altera hurricane four generation chip, LCD screen color display, the effective realization of line and field scanning.Practice FPGA to drive VGA or LCD display)

Rst是低电平有效的系统复位信号，Clk是时钟信号。AB[5：0]是地址信号，DB[7：0]是数据信号，wr是低电平有效的写信号。start是启动信号。 模块中有一个64x8的双端口的存储器。系统复位结束后，可以通过AB、DB和wr信号向同步存储器写入数据。当写入64个数据后，给出一个Clk周期宽度的脉冲信号start，则系统从存储器0地址处开始读出数据，读出的8位数据从低位开始以3位为一组，每个时钟周期输出一组，即第一个时钟周期输出[2：0]位，第二个时钟周期输出[5：3]位，第三个周期输出1地址的[0]位和0地址的[7：6]位，直至将存储器中64x8数据全部输出。若最后一组不足三位，则高位补0。 (Rst is an active-low system reset signal, Clk is a clock signal. AB [5: 0] is the address signal, DB [7: 0] is the data signal, wr write signal is active low. start is the start signal. Module in a dual port memory of 64x8. After the reset, you can write data to the synchronous memory by AB, DB and wr signals. When data is written to 64, given the width of a pulse signal Clk cycle start, the system begins to read the memory address 0, 8 data read out a low starting with three as a group, each clock outputs a set period, which is the first clock cycle of the output [2: 0] bits, the second clock cycle output [5: 3] position, the third cycle of the output of an address [0] and 0 address [7 : 6] bit, until all the data in memory 64x8 output. If the last group of less than three, the high 0s.)

算法状态机方法是一种设计有限状态机的方法。它用来表示数字集成电路的图表。ASM图类似于状态图，但形式化程度较低，因此更易于理解。ASM图表是描述数字系统顺序操作的一种方法系统。这个这项工作的目的是通过一个用vhdl编写的算法状态机（ASM）来计算一个数的平方根的整数部分。这项工作附在用葡萄牙语编写的报告之后。

vga controller vhdl, it draws 3 lines -vga controller vhdl, it draws 3 lines

说明：  Implementation of CORDIC atan block in VHDL

vivado lwip 应用文档 基于zynq 7020(vivado lwip example text of zynq)

- RS码是Reed-Solomon 码（理德－所罗门码）的简称，它是一类非二进制BCH码，在RS码中，输入信号分成k·m比特一组，每组包括k个符号，每个符号由m个比特组成。(- RS code is a Reed-Solomon code (Reed- Solomon codes) for short, is a non-binary BCH code, the RS code, the input signal is divided into a set of k · m bits, each including k symbols, each symbol consists of m bits.)

AGC(自动增益放大) Verilog代码 设计可以参考(AGC (automatic gain control) can refer to the Verilog code design )

一个计算机原理课程设计的作业，5级流水线CPU，指令集到代码均为自己设计，有最终报告文档，组建说明，并行除法，16位字长，定长指令，Verilog源代码，顶层设计图。结构简单，冲突解决方式也很简单，代码量小。(A computer theory course design work, five pipelined CPU, instruction set to the code are design, the final report documents the formation of parallel division, 16-bit word length, fixed-length instructions, Verilog source code, top level design. Simple structure, conflict resolution is also very simple, a small amount of code.)

SPI接口协议，将spi总线转换成为LOCALBUS总线(SPI interface protocol, the spi bus converted into LOCAL BUS bus)