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Gigabit-Ethernet

基于 UDP 协议的千兆以太网视频外挂ddr3存储并hdmi显示和心率数据传输 image 1.软件环境:Vivado 2018.3、ModelSim、 Wireshark、 Matlab 2. 硬件环境:xc7a75tfgg484-2、MT41K128M16JT、vsc8601xkn 3.项目描述:

(1)Matlab 与板卡通过UDP 协议建立通讯,由Matlab 把视频转为 mat 文件,然后下发给板卡。

(2)板卡从 RJ45 接收数据,PHY 芯片将差分信号转为双沿触发信号,FPGA 与PHY 芯片通讯采用RGMII

协议。

(3)FPGA 控制逻辑按功能可分四个部分,IDDR_CTRL 模块将PHY 芯片的双沿采样信号转化为单沿采样信号,PHY 芯片的参考时钟 125MHz,数据位宽 4bit,故传输速率可达到 125x4x2=1000Mbps; DDR_CTRL 模块用于对 MIG 的 IP 核进行封装,从而使用户接口时序更加简洁、易用;HDMI 驱动模块用于 HDMI 设备的驱动显示;ODDR_CTRL 模块则用于产生一个心跳速率的 UDP 包,通过以太网协议传回上位机,验证整个数据传输回路。

(4)实现效果:HDMI 显示设备可以正常显示动画视频,显示模式 1024x768@60Hz,上位机软件 Wireshark

获取到心跳速率 UDP 包,且 CRC 校验正确。

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