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Ethernet

Table of Contents

  1. Ethernet
  2. Hardware
  3. Library

Ethernet

Hardware

First of all you have to connect your mbed to a RJ45 jack. These instructions can be found here : Networking Ethernet RJ45.

Library

Getting started

This is essentially a tri-liner:

First include the header file:

#include "if/eth/ethIf.h"

Instantiate the interface: If you are using DHCP:

EthernetNetIf eth;

Or if you want to set your own parameters:

EthernetNetIf(
  IpAddr(192,168,0,101), //IP Address
  IpAddr(255,255,255,0), //Network Mask
  IpAddr(192,168,0,1), //Gateway
  IpAddr(192,168,0,1)  //DNS
);

And set it up:

eth.setup();

That's it!

Reference

EthernetNetIf()

Instantiate the Interface & register it against the stack. DHCP will be used.

EthernetNetIf(IpAddr ip, IpAddr netmask, IpAddr gateway, IpAddr dns)

Instantiate the Interface & register it against the stack. DHCP will not be used. IpAddr is a container class that can be constructed with either 4 bytes or no parameters for a null IP address.

void setup()

Bring the interface up.

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