AN02044: Using XMOS TCP/IP Library for UDP-based Networking

Summary¶

This application note demonstrates the use of XMOS TCP/IP stack on an XMOS multicore micro controller to communicate on an ethernet-based network.

The code associated with this application note provides an example of using the XMOS TCP/IP lib_xtcp Library and the ethernet board support component to provide a communication framework. It demonstrates how to send and receive text messages on the XMOS device in the network using the UDP stack using lib_xtcp. The library features low memory footprint but provides a complete stack of various protocols.

Ethernet connectivity is an essential part of the explosion of connected devices known collectively as the Internet of Things (IoT). XMOS technology is perfectly suited to these applications - offering future proof and reliable ethernet connectivity whilst offering the flexibility to interface to a huge variety of “Things”.

The code associated with this application note provides an example of using the TCP/IP and Ethernet Libraries to provide a UDP loopback using a Reduced Media Independent Interface (RMII) and MAC interface supporting 100 Mbps.

Note: This application note requires an application to be run on the host machine to test the communication with the XMOS device.

Features¶

• UDP connection handling

• Common API to TCP/IP stack, LwIP

• DHCP, IP4LL, ICMP, IGMP, TCP and UDP

• Low level, event based interface for efficient memory usage

• Supports IPv4 only, not IPv6

Known issues¶

• None

Required tools¶

• XMOS XTC Tools: 15.3.1

Required libraries (dependencies)¶

• lib_board_support

• lib_ethernet

• lib_i2c

• lib_locks

• lib_logging

• lib_random

• lib_sw_pll

• lib_xassert

• lib_xtcp

Related application notes¶

• AN00120: 100Mbps RMII ethernet application note

• AN00199: XMOS Gigabit Ethernet application note (XK_EVK_XE216)

• AN00121: Using XMOS TCP/IP Library for UDP-based Networking on XCORE-200 application note