基于FPGA的UART功能实现

该模块依据输入的温度，来自动调整PWM输出的占空比，从而进行CPU散热风扇的智能调速，温度需要上层软件往该模块中下发。

介绍如何使用vivado来调用和封装IP核，测试AXI4总线的三种功能协议。(It describes how to use vivado to call and package IP core test three functions AXI4 bus protocol.)

基于VHDL语言的波形发生器编程设计，能够实现常用波形的产生。(Waveform generator design based on VHDL programming, to achieve common waveform generated.)

FPGA通过AXI总线传输数据给ARM,ARM使用DMA方式接收数据！(FPGA to ARM Bridge design example)

HART 官方资料-HART协议采用基于Bell202标准的FSK频移键控信号，在低频的4-20mA模拟信号上叠加幅度为0.5mA的音频数字信号进行双向数字通讯，数据传输率为1.2kbps。(Official information-HART HART protocol based Bell202 standard frequency shift keying FSK signal at low frequencies 4-20mA analog signal amplitude is 0.5mA superimposed on the two-way audio digital signal digital communication, data transfer rate of 1.2kbps.)

在FPGA开发平台上，通过按键控制一个弹球小游戏。输出VGA显示信号输送到显示器上显示(On the FPGA development platform button control of a pinball game. VGA output signal is supplied to the display displayed on the display)

自己写的一个使用单片机配置FPGA的下位机C代码，使用一个C8051F330,外置SPI FLASH,通过串口可将程序写入FLASH,上电时自动加载到FPGA完成配置。(Wrote it myself, using a microcontroller to configure FPGA code for the next bit plane C, using a C8051F330, external SPI FLASH, the program is written through the serial port can be FLASH, power-on automatically loaded into the FPGA to complete the configuration.)

16位并行乘法器源代码，booth2编码，二进制树拓扑结构(16bits parallel multiplier source code )

说明：  基于ESS303开发板的OV7670_VGA拍照功能实现(Implementation of OV7670_VGA camera function based on ESS303 development board)