We have a weird hardware setup where we "direct connect" an Intel NIC to the ethernet port of a Tiva 129. They are not talking but I have link status lights from the Intel NIC. Nothing happens when I ping the Tiva with "normal" setup. My Intel NIC is 10.3.0.191 and my Tiva is 10.3.0.192 with 255.255.255.0 netmask. I get no response from the Tiva to an ARP request.
Just for fun I set the Tiva netmask to 0.0.0.0 and that causes the Tiva to crash and burn when the first ARP packet gets sent. This is a pretty good clue that nothing is happening until a packet comes through and the Tiva sees "something" in the way of data when that first packet comes in.
I have found all sorts of good tools on the Unix( QNX) side like netstat and tcpdump that have been very useful.
Is there a tool that will let you build an ethernet packet in Unix/Linux/QNX and then send that packet on a particular interface? It would be helpful to be able to write a small test program to send a packet to the Tiva and watch what is happening. A Google search did not turn up any useful links.
I suspect a hardware issue, but who knows...
