Summary

Lightweight IP (lwIP) is an open source TCP/IP networking stack for embedded systems. The Xilinx ® Software Development Kit (SDK) provides lwIP software customized to run on various Xilinx embedded systems that can be MicroBlaze ™ or ARM®-based Xilinx Zynq®-7000 All Programmable (AP) SoC. The information in this application note applies to ARM-based Zynq-7000 AP SoC systems. This document describes how to use the lwIP library to add networking capability to an embedded system. In particular, lwIP is utilized to develop these applications: echo server, web server, Trivial File Transfer Protocol (TFTP) server, and receive and transmit throughput tests. You can download the Reference Design Files for this application note from the Xilinx website. For detailed information about the design files, see Reference Design. Hardware and Software Requirements The hardware and software requirements are: • One Xilinx ZC-702 board for Zynq-7000 AP SoC-based systems. • Xilinx JTAG for Zynq-7000 AP SoC-based systems • USB cable for RS232 UART communication on the board • An ethernet cable connecting the board to a Windows or Linux host • Serial Communications Utility Program, such as HyperTerminal or Teraterm • Xilinx Vivado 2014.2 for creating hardware design • Xilinx SDK 2014.2 for running or making modifications to the softwar