TOPSWITCH

跑马灯-是移位寄存器 有6个灯，无延时entity-Bomadeng-shift register is a six lights, without delay entity

支持{addu、subu、lui、ori、jal、jr、lw、sw、nop}指令集的单周期CPU，verilog硬件描述语言实现(Support {addu, subu, lui, ori, jal, jr, lw, sw, nop} instruction set of one-cycle CPU, Verilog hardware description language implementation)

SPI接口的vhdl代码，可以实现与单片机的spi通信，完整的工程-SPI interface of the VHDL code can be achieved with SCM spi communication, complete works

说明：  单周期cpu，使用verilog编写的的单周期cpu支持......等功能(Single cycle CPU, using Verilog written single cycle CPU support... And other functions)

并口通讯代码 并口通讯代码（调试通过） --该代码目前能实现单个字节的收发-Parallel communications code (debugging through)-- The code can now achieve a single byte of Transceivers

SHIFT_8REG是8位的一个具有移位功能的寄存器，每一次数据打入都会从这个寄存器的最低位打入，并相应进行向左移位。 ODD_110BREG是一个3位的备份寄存器，寄存器中存放的是奇数帧的同步头，也就是110。 EVEN_9BHREG是一个8位的备份寄存器，寄存器中存放的是偶数帧的同步头，也就是10011011。这两个寄存器的初始值在系统一开始就打入。 -SHIFT_8REG is eight with a displacement of the functional Register, Each will enter the data from the register into the lowest point, and the left shift accordingly. ODD_110BREG is a three backup Register, the Register is stored in the odd frame synchronization head, is 110. EVEN_9BHREG 8 is a backup Register, which register is kept even the first frame synchronization, is 10011011. This register the two initial value of the system into a start.

本书是一本关于VERILOG方面的专业书籍，是通往FPGA设计的基础书籍，值得一看。(thsi is a book of VerilogHDL,also a basic book to master.)

quartus license dede(quartus 11.0 license)

The ElectricTM VLSI Design System is an open-source Electronic Design Automation (EDA) system that can handle many forms of circuit design, including: * Custom IC layout * Schematic Capture (digital and analog) * Textual Languages such as VHDL and Verilog (The ElectricTM VLSI Design System is an open-source Electronic Design Automation (EDA) system that can handle many forms of circuit design, including:* Custom IC layout* Schematic Capture (digital and analog)* Textual Languages such as VHDL and Verilog)

本例程位于 VMD642_CPLD目录中。 使用 CPLD 实现辅助译码、LED 指示灯控制、看门狗等各种逻辑控制电路。源程序使 用 Verilog HDL书写，编译开发系统使用 Cypress公司的 Warp 6.3。(This routine is located VMD642_CPLD directory. Using CPLD implementation auxiliary decoding, LED indicator control, watchdog, and other logic control circuitry. Written using Verilog HDL source code, the compiler development system using Cypress' s Warp 6.3.)