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<title>Atmel Corporation - Basic EMAC 1.4</title>
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<h1>Basic EMAC Project 1.4</h1>
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EMAC
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<h2>Purpose</h2>
<p>
This project uses the Ethernet MAC (EMAC) and the on-board Ethernet transceiver available on Atmel evaluation kits.
It enables the device to respond to a ping command sent by a host computer.
</p>
<h2>Hardware Requirements</h2>
<div class="requirements">
<p>
This application will work on the following evaluation kits:
<ul>
<li>AT91SAM7X-EK</li>
<li>AT91SAM7XC-EK</li>
<li>AT91SAM9260-EK</li>
<li>AT91SAM9263-EK</li>
<li>AT91SAM9XE-EK</li>
<li>AT91CAP9-DK</li>
</ul>
</p>
</div>
<p>
The system reset signal NRST is connected to both the Ethernet PHY and the JTAG/ICE interface. This prevents the
project from working properly when a JTAG probe is connected. To disconnect NRST from the ICE interface, the
following modifications must be performed:
<ul>
<li>AT91SAM7X/XC-EK: cut strap S2.</li>
<li>AT91SAM9XE-EK: remove resistor R14</li>
<li>AT91SAM9260-EK: remove resistor R14</li>
<li>AT91SAM9263-EK: remove resistor R18</li>
</ul>
</p>
<h2>Description</h2>
<p>
Upon startup, the program will configure the EMAC with a default IP and MAC addresses and then ask the
transceiver to auto-negotiate the best mode of operation. Once this is done, it will start monitoring
incoming packets and processing them whenever appropriate.
</p>
<p>
The basic will only answer to two kinds of packets:
<ul>
<li>It will reply to ARP requests with its MAC address,</li>
<li>and to ICMP ECHO request so the device can be PING'ed.</li>
</ul>
</p>
<p>
To test that the board responds correctly to ping requests, type the following command-line on a computer
connected to the same network as the board:
</p>
<blockquote><code>ping 10.159.245.156</code></blockquote>
<h2>Usage</h2>
<ol>
<li>
Build the program and download it inside the evaluation board. Please refer
to the <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6132.pdf">SAM-BA User Guide</a>,
the <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6310.pdf">GNU-Based Software Development</a>
application note or to the <a href="http://www.iar.se/website1/1.0.1.0/78/1/index.php?">IAR EWARM User Guide</a>,
depending on your chosen solution.
</li>
<li>
<strong>Optionally</strong>, on the computer, open and configure a terminal application
(e.g. HyperTerminal on Microsoft Windows) with thesesettings:
<ul>
<li>115200 bauds</li>
<li>8 bits of data</li>
<li>No parity</li>
<li>1 stop bit</li>
<li>No flow control</li>
</ul>
</li>
<li>
Connect an Ethernet cable between the evaluation board and the network. The board may be connected directly
to a computer; in this case, make sure to use a cross/twisted wired cable such as the one provided with the
evaluation kit.
</li>
<li>
Start the application. It will display the following message on the DBGU:
<blockquote>
<code>
-- Basic EMAC Project 1.4 --<br />
MAC 23:45:56:78:9a:bc<br />
IP 10.159.245.156<br />
</code>
</blockquote>
</li>
<li>
The program will then auto-negotiate the mode of operation and start receiving packets, displaying feedback
on the DBGU. To display additional information, press any key in the terminal application.
</li>
<li>
To test that the board responds to ICMP ECHO requests, type the following command line in a shell:
<blockquote><code>ping 10.159.245.156</code></blockquote>
</li>
</ol>
<h6>Atmel Corporation ©2008</h6>
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