> Karl Reichert wrote: > >> Jan Kiszka wrote: > >>> Karl Reichert wrote: > >>>> Jan Kiszka wrote: > >>>>> Karl Reichert wrote: > >>>>>> Hello, > >>>>>> > >>>>>> I have a question concerning RTcfg-frames. I couldn't completely > >>>> understand from RTcfg.spec how these frames are looking like. I made > >> two models > >>>> and I think one of these is correct (see attachment). Which one? > >>>>> The first one. RTmac frames have their own Ethertype (0x9021), and > >> they > >>>>> only contain discipline frames (like TDMA) or encapsulated non-RT > >> frames > >>>>> (see the vnic tunnels). RTcfg frames are just plain RT payload, like > >>>>> frames issued by RT-applications. > >>>> BTW, Ethereal, err..., Wireshark perfectly understands RTnet. =8) > >>>> > >>>> Jan > >>>> > >>> Thanks. Another question: Are those Frame Identifier Bits (B4..0) the > >> same like the ID? It's little bit mistakable because they are 1 Byte > (all > >> taken from RTcfg.spec). > >>> If not, what if the Frame Identifier for / filled with? > >> I see the confusion: "Frame Identifier" may rather be called "Frame > >> Type" so that "Frame Version" + "Frame Type" form the "Frame ID" (or > >> just ID) as this byte is called later on. May may grab this information > >> >from the textual description, but the naming can indeed be misleading. > >> > >> HTH, > >> Jan > >> > >> > >> PS: _Always_ reply to all... > >> > > Another question, maybe very simple but can't find it in the spec: How > is data send? Just as a plain/raw packet or is there also sth added like > version or type in the TDMA-Frame? > > But that should be clear from the spec: plain Ethernet frames, no > additional headers. > > Jan > Thanks Jan. I also have a question to the normal starup, Calibration Phase: The Slaves are waiting until Slot Timeout before they send their Calibration Request. Is this timeout a random value? Because there aren't any sync clocks yet, I think this value cannot be a value to help them to send their answer in their timeslot, right?!
Thanks Karl -- von Karl Reichert "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
