xPC UDP Ethernet Card Selection

Hello,

I have created a really simple UDP communications model. The model uses Matlab R2009b and the standard xPC UDP Send and Receive blocks from that version.

I run this model on two different xPC machines and connect them together via a switch so that they can send and receive a sine wave between them.

This all works fine and I can see the xPC systems sending the sine waves and receiving them on xPC Scopes.

A problem occurs when the xPC Target Explorer polls the xPC systems and causes the transmissions/receives to stop (stops updating). I sort of expected this as its UDP and there is obviously other overheads on the bus.

However I need this comms link to run un-interrupted. The easiest solution is to move the Ethernet port used to another card in the xPC systems.

Ive trawled through all the blocks documentation and do not understand / cant see how to change the device that this information is sent over.

Can you please help

Kind Regards

Tom

Answer 1

[Suneesh]

The sharing of the Ethernet connection happens since you are using the (non real time) UDP blocks. For the targets to exchange information on a separate dedicated network, separate dedicated Ethernet cards have to be used. In that case the appropriate blocks to be used are available in th library under: xPC Target > Real-Time UDP . These "Network Configuration" block has PCI Bus and Slot parameters that may be used to select the dedicated card to be used. See: http://www.mathworks.com/help/releases/R2013b/xpc/io_ref/network_configuration_rt_udp.html