13.18. lwip_tcpecho_rtthread-nano

13.18.1. Overview

This example shows TCP echo communication on RTThread-Nano.

• PC sends TCP data frames to MCU, and then MCU sends the data frames back to PC

13.18.2. Board Settings

• Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable

• Connect an Ethernet port on PC to a RGMII port or a RMII port on the development board with an Ethernet cable

13.18.3. Project Configuration

• Ethernet Port Settings: Refer to Ethernet common project settings

• Ethernet DHCP Configurations

  • the configurations in the CMakeLists.txt as follows:

    • sdk_compile_definitions(-DLWIP_DHCP=0): Disable DHCP feature

    • sdk_compile_definitions(-DLWIP_DHCP=1): Enable DHCP feature

13.18.4. Run Example

• Compiling and Downloading

• Running log is shown in the serial terminal as follows:

  This is an ethernet demo: TCP Echo on RTThread-Nano
  LwIP Version: 2.1.2
  
   \ | /
  - RT -     Thread Operating System
   / | \     3.1.5 build Jan 10 2024
   2006 - 2020 Copyright by rt-thread team
  Enet phy init passed !
  msh >Link Status: Up
  Link Speed:  1000Mbps
  Link Duplex: Full duplex
  IPv4 Address: 192.168.100.10
  IPv4 Netmask: 255.255.255.0
  IPv4 Gateway: 192.168.100.1
  

• Run an Ethernet debugging tool

  • create and set a TCP client: TCP Server IP: 192.168.100.10/Port: 5001

    Note: There is a necessary adjustment for Server IP according to the segment of LAN where PC resides

  • Connect

  • Enter and send any characters in the edit window

    

  • Watch the characters echoed from MCU