> Karl Reichert wrote: > >> Karl Reichert wrote: > >>> When using the tdmacfg-tool, one can specify an offset. Reading > >> TDMA-Spec line 568: > >>> "If <offset> is given, the time slot is added or modified to send data > >> with the specified offset in microseconds relative to the scheduled > cycle > >> start [...]" > >>> To my understanding this means, doing 'tdmacfg rteth0 slot 0 0' means > >> that you would override the sync frame slot. Or is there a mistake in > the > >> spec and one should read: > >>> "[...] specified offset in microseconds relative to the scheduled sync > >> frame start [...]" > >> > >> The cycle start is defined by the sync frame. No sync frame, no cycle. > >> Thus the former implies the latter. So you cannot use the "slot" > command > >> of tdmacfg to manipulate sync frames, there is "master" for this (also > >> to define a backup master sync frame slot). > >> > >> Jan > >> > > Okay, thanks, so it makes sense. > > > > When I execute this command, I get an error because I don't have the > device /dev/rteth0. When is it created or do I have to create it by hand (with > which parameters)? > > Assuming you mean /dev/rtnet -> see README. > > Jan > No, /dev/rtnet I created as mentioned in README. I'm talking about rteth0 and rtlo. They don't exist, although I configured RTnet (make menuconfig) to also build RTcap and RTloopback support. -- von Karl Reichert
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