13.17. lwip_tcpecho_multi_ports_rtthread-nano

13.17.1. 概述

本示例展示在RTThread-Nano下多端口TCP回送通讯

  • PC 通过以太网发送TCP数据帧至MCU，MCU将接收的数据帧回发至PC

13.17.2. 硬件设置

  • 使用USB Type-C线缆连接PC USB端口和PWR DEBUG端口

  • 使用两根以太网线缆连接PC以太网端口和开发板上RGMII端口和RMII端口

13.17.3. 工程配置

  • 以太网端口配置：参考 以太网通用工程设置

  • 以太网DHCP配置

    • lwIP sample: 在CMakeLists.txt中，支持如下配置:

      • sdk_compile_definitions(-DLWIP_DHCP=0): 禁用DHCP功能

      • sdk_compile_definitions(-DLWIP_DHCP=1): 启用DHCP功能

13.17.4. 运行示例

  • 编译下载程序

  • 串口终端显示如下信息：

    This is an ethernet demo: TCP Echo With Multi Ports On RTThread-Nano
LwIP Version: 2.1.2
Enet1 Reference Clock: Internal Clock

 \ | /
- RT -     Thread Operating System
 / | \     3.1.5 build Mar 18 2024
 2006 - 2020 Copyright by rt-thread team
msh >Enet0 init passed!
Enet1 init passed!
================ Network Interface 1 ================
Link Status: Down
================ Network Interface 1 ================
Link Status: Up
Link Speed:  100Mbps
Link Duplex: Full duplex
================ Network Interface 1 ================
IPv4 Address: 192.168.200.10
IPv4 Netmask: 255.255.255.0
IPv4 Gateway: 192.168.200.1
================ Network Interface 0 ================
Link Status: Down
================ Network Interface 0 ================
Link Status: Up
Link Speed:  1000Mbps
Link Duplex: Full duplex
================ Network Interface 0 ================
IPv4 Address: 192.168.100.10
IPv4 Netmask: 255.255.255.0
IPv4 Gateway: 192.168.100.1

  • 打开以太网调试工具

    • 创建并设置TCP客户端： TCP服务端0 IP: 192.168.100.10/端口: 5001 TCP服务端1 IP: 192.168.200.10/端口: 5002

      注：实际需要根据PC所在局域网段调整服务端IP

    • 连接

    • 在数据发送窗口(192.168.100.10/5001)编辑发送字符

      ../../../_images/lwip_tcpecho_multi_ports_0_1.png

    • 观察回送数据窗口(192.168.100.10/5001)

      ../../../_images/lwip_tcpecho_multi_ports_0_2.png

    • 在数据发送窗口(192.168.200.10/5002)编辑发送字符

      ../../../_images/lwip_tcpecho_multi_ports_1_1.png

    • 观察回送数据窗口(192.168.200.10/5002)

      ../../../_images/lwip_tcpecho_multi_ports_1_2.png