View Single Post
Old January 24th, 2012   #4
ericthegeek
Task Group Member
 
Join Date: Aug 2008
Posts: 375
Default

Quote:
Originally Posted by PeakPaul View Post
I found the following in the Enttec Sniffer Manual:
Don't rely on any third party documents. Tables 3-1 through 3-4 in the E1.20-2010 standard are the official timing requirements. RDM Timing is very strict, plan on spending lots of time with an oscilloscope.

Other things to watch out for:
Make sure you handle Broadcast and Vendorcast packets properly. You must not respond to a broadcast and you have to be ready for a new packet within 176 microseconds. A common problem is for responders to take too long to process a broadcast and thus miss a new packet that arrives shortly after the broadcast.

Pay close attention to the semantics of ACK_TIMER and ACK_OVERFLOW if you use those features.
ericthegeek is offline   Reply With Quote