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Unread 15-10-2014, 11:35
matan129 matan129 is offline
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Re: Optimal board for vision processing

Quote:
Originally Posted by techhelpbb View Post
Even if the D-Link were to repeat the packets you send over the D-Link switch intended only for the wired ports, if the packets are UDP it has no effect on the onboard interconnection. The worst that happens is you hit the field side with UDP and frankly if they are monitoring remotely as they should they can filter that if it really came down to it.

Also you do not need to send much over the D-Link switch unless you are sending video to the driver's station. In fact you can avoid the Ethernet entirely if you use I2C, the digital I/O or something like that.

So you should be good. Just be careful to realize that if you do use Ethernet to do this - you are using some of the bandwidth to the cRIO and RoboRio and if you do this too much you can cause issues. You do not have complete control over what the cRIO/RoboRio does on Ethernet especially when on a regulation FIRST field.

I believe there is a relevant example of what I mean in the Einstein report from years past.



Yes a properly working ARP table in a switch should work that way.

D-Link has had issues with this in the past. Hence they deprecated the bridge feature from the DIR-655.

There are hints to this floating around like this:
http://forums.dlink.com/index.php?topic=4542.0
Can you elaborate what I2C is? (again- I'm new to FRC. Sorry if this is a noob question!)
 


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