On 2013-03-07 15:44, Mariusz Janiak wrote: > Dear all, > > I would like to implement the RTnet protocol on a small a microcontroler. As > far, I have working a TDMA discipline which is able to synchronize with a > master (PC with Xenomai). Also, I have working non rt UDP stack implemented > on top of the FreeRTOS. In the next step I plan to send a UDP frames through > a RTmac.
Sounds cool. :) > At this point I have small uncertainty, how whole ethernet frame containing a > RT UDP looks like? I assume that sending a standard UDP frame in a node slot > is not a point. Is the > following frame correct? > > ---------------------------------------------------------------------------------------------------------- > | | | | > | | > | Ethernet header | RTmac header | IP header | UDP header | DATA | > | | | | > | | > ---------------------------------------------------------------------------------------------------------- > > Ethertype = 0x9021 > > If this is a RT UDP frame, how looks like RTmac header: > - Type = ???, > - Version = 0x02, > - Flags = 0x01 ??? > > Could you please shed light on this issue? RT packets do not come with an RTmac header. That is only used to encapsulate and tunnel non-RT packets (and for RTmac control packets, of course). You can find more information in rtnet/Documentation/*.spec. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SDP-DE Corporate Competence Center Embedded Linux ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
