Re: [RTnet-developers] Suspect packet

[Jan K. <jan...@we...>]

Frank Tkalcevic wrote:
>>> I'm not sure why the sync packets were coming out as well 
>> as the rtcfg 
>>> traffic.  Is that correct behaviour?  I would have thought the sync 
>>> process would only happen after rtcfg set up was complete.
>> It is correct, RTmac/TDMA is in charge of managing the media 
>> access right from the start (that's why RTcfg stage 1 frames 
>> have to include all information a slave needs to send its own 
>> frames, namely the TDMA cycle offset and phase).
>>
>> BTW, Wireshark is capable of decoding RTnet frames, maybe 
>> helpful for understanding the procedures.
> 
> 
> That's confusing me a bit.  It looks like rtcfg just outputs packets as it
> pleases and doesn't obey real time rules.  Does it sit on top of Rtmac?
> Does it need to stop after all the clients are ready and obeying the TDMA
> protocol, or can it coexist?

RTcfg is plain payload from RTmac/TDMA POV. Check if RTcfg frames sent
by the master have a fixed offset (minus jitter) from the Sync frame. If
not, something is badly configured (but that is unlikely if you used the
standard setup script).

Jan