Karl Reichert wrote: >>> 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 >> > I still don't understand this from spec: How does a real-time data frame > looks like, if I'm using TDMA on RTnet?
Just like they look without RTmac/TDMA: RT data frames are not encapsulated in any way (only tunnelled non-RT frames are). > > First there comes the ethernet header, including Preamble, SFD and Type > (0x9021). Then, as far as I understand right now, it's followed by RTmac-Type > (0x0001 for TDMA), Version 0x02, Flag (LSB=0). Then TDMA-Version 0x0201 and > Frame ID (which one for data?) and the payload itself. > > So my Question is, which Frame ID is used for data? Or if the data is just > following after the Flag-Byte, what is be done if the payload starts with > 0x02010000.........0? How does the receiver know that there is now pure data > coming? > > I can't find a real information in the spec. > > Thanks a lot > Karl
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