19.17. lwip_tcpecho_multi_ports_freertos

19.17.1. Overview

This example shows TCP echo communication on multiple ports on FreeRTOS.

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

19.17.2. Board Settings

Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable
Connect two Ethernet ports on PC to a RGMII port and a RMII port on the development board with two Ethernet cables

19.17.3. Project Configurations

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

19.17.4. Run Example

Compiling and Downloading

Running log is shown in the serial terminal as follows:

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

Run an Ethernet debugging tool
- create and set two TCP clients:
  
  TCP Server 0 IP: 192.168.100.10/Port: 5001 TCP Server 1 IP: 192.168.200.10/Port: 5002
  
  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(192.168.100.10/5001)
- Watch the characters echoed from MCU window(192.168.100.10/5001)
- Enter and send any characters in the edit window(192.168.200.10/5002)
- Watch the characters echoed from MCU window(192.168.200.10/5002)