<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>Ethernet Problem</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/25798/ethernet-problem</link><description> 
Hi, 

 
I&amp;#39;m trying to enable my development board to communicate with a PC
via Ethernet. I am able to establish a connection and send data from
the PC to the micro without any issues. When I try to send data from
the micro to the PC, however, the PC</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: Ethernet Problem</title><link>https://community.arm.com/thread/104082?ContentTypeID=1</link><pubDate>Wed, 07 Jul 2010 14:10:32 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:168d3d07-ef03-4c35-a808-d5e2187974f3</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Didn&amp;#39;t Wireshark notice that?!&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Ethernet Problem</title><link>https://community.arm.com/thread/78474?ContentTypeID=1</link><pubDate>Wed, 07 Jul 2010 11:23:43 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d7534999-c64b-42af-ba6c-ccb19834d2e1</guid><dc:creator>Paul Marley</dc:creator><description>&lt;p&gt;&lt;p&gt;
Hi Andy,&lt;/p&gt;

&lt;p&gt;
I finally figured out what the problem was. When I implemented the
TCP/IP stack on the micro I made a mistake in the routine that
calculates the IP header checksum. With an invalid checksum Winsock
just disregarded the message. Once the correct checksum was sent
everything worked fine.&lt;/p&gt;

&lt;p&gt;
Thanks for all your help. I appreciate it.&lt;/p&gt;

&lt;p&gt;
Paul&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Ethernet Problem</title><link>https://community.arm.com/thread/65715?ContentTypeID=1</link><pubDate>Tue, 06 Jul 2010 10:21:08 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:c9fefa5e-5321-41ed-8d8b-c12cd35bc1dc</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
What do you have running on the PC to do the response?&lt;br /&gt;
Are you sure it&amp;#39;s all configured correctly?&lt;/p&gt;

&lt;p&gt;
I have found the following free simple test tools to be very
useful:&lt;/p&gt;

&lt;p&gt;
TCP: &lt;a target="_blank" href="http://www.simplecomtools.com/productcart/pc/viewPrd.asp?idproduct=7&amp;amp;idcategory=5"&gt;&amp;quot; href=
&amp;quot;http://www.simplecomtools.com/productcart/pc/viewPrd.asp?idproduct=6&amp;amp;idcategory=5&amp;quot;&amp;gt;
&lt;a href="http://www.simplecomtools.com/productcart/pc/viewPrd.asp?idproduct=6&amp;amp;idcategory=5"&gt;www.simplecomtools.com/.../viewPrd.asp&lt;/a&gt;&lt;/a&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>