pwm virterbi 译码器

介绍了FPGA设计的十大准则，对初学者很有用，对于工作多年的同志，也会有整理总结的好处(Describes the FPGA design of the top ten criteria are useful for beginners, for many years comrades, there will be finishing the benefits of the summary)

基于DDS和SOPC的谐波信号发射器，拥有可调节的频率，阶段和谐波比例的谐波信号发射器由本文所设计。(Based on DDS and SOPC harmonic signal transmitter, with adjustable frequency, phase and harmonic proportion of harmonic signal transmitter designed by this article.)

LPC4357开发板采用ARM的Cortex-M4微控制器LPC4357。内置一个ARM Cortex-M0协处理，CPU运行频率高达204MHz，片内集成1MB Flash和36KB SRAM。开发板采用独立核心板设计，核心板集成64MB SDRAM、128MB NAND-Flash、4MB SPI-Flash。核心板上的摄像头接口可直接连接各种型号的摄像头，两侧160P排针接口引出了除EMC总线外的LPC4357芯片所有功能管脚。 开发板提供丰富的外设接口，包括以太网、液晶屏、摄像头、USB-Host、USB-OTG、SD卡、RS232、RS485、CAN、耳机、麦克风、温度传感器、AD/DA、JTAG仿真器等。此外，开发板提供一个14P扩展接口，包括1路UART、1路SPI、1路I2C、4个IO、3.3V、5V，可以很方便的扩展自己的外围电路。(DS-LPC4357 development board using the Cortex-M4 microcontroller LPC4357 ARM s. A built-in ARM Cortex-M0 co-processor, CPU operating frequency up to 204MHz, 1MB Flash and 136KB SRAM integrated on chip. Development board using an independent core board design, the core board integrates 64MB SDRAM, 128MB NAND-Flash, 4MB SPI-Flash. Camera core board interface can be directly connected to various types of cameras, both sides 160P pin interface leads to the outside of the bus in addition to EMC LPC4357 chip all the functions of the pins. Development board provides a rich set of peripheral interfaces, including Ethernet, LCD screen, camera, USB-Host, USB-OTG, SD card, RS232, RS485, CAN, headphone, microphone, temperature sensor, AD/DA, JTAG emulator, etc. . In addition, the development board provides a 14P expansion interfaces, including one-way UART, 1 road SPI, 1 channel I2C, 4 个 IO, 3.3V, 5V, can easily expand their peripheral circuits.)

VHDL代码完成行列交织与解交织的功能实现(the realization of interleaver on VHDL language)

本程序为四路抢答器verlog HDL语言工程实例。(This program is four Responder verlog HDL language engineering examples.)

i2C slave功能模块的一种实现方式，简单易根据自己实际需求做修改，已经过FPGA验证可以很好的工作

Verilog code for RS-(255,239) encoder.

接口模块，通过对高位地址的编码可实现在一个FPGA中配置四个独立的功能模块，每个功能模块具有一个带FIFO的输出口和13个独立的可由DSP读写的寄存器，寄存器功能可自定义。模块还包含两个全局寄存器，可实现全局复位，中断等功能。该模块以应用于实际的项目中，目前运行良好(FPGA to emif)

说明：  SDRAM控制，通过VHDL语言编写可运行至133MHz。(SDRAM control, written in VHDL language, can run to 133MHz.)

设计一个能求出一个1之间最大间隙的时序状态机。完成testbench描述，给出综合后的时序仿真结果