Hi James,
LPCOpen contains examples like you need.
LPCOpen Libraries and Examples|NXP
the lwip_tcpecho_sa: this example shows how to use the raw API with the LWIP contrib TCP Echo example using the 17xx/40xx LWIP MAC and PHY drivers without and RTOS.
the webserver: The LWIP HTTP Server example demonstrates the HTTP Server functionality using LWIP ethernet stack (without RTOS).
I hope this helps,
Have a great day,
Sol
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