Karl Reichert wrote: > Hello, > > I have two stations running RTnet, one as a master and one as a slave. I want > to measure the time, which a message, sent from master to slave, takes. But, > I don't want the time of the transmission only, but the complete time of all > software layers this data is processed through. > > _______________ _______________ > | A | | D | > |______________| |______________| > | B | | C | > |______________| |______________| > | RTnet (Master) | | RTnet (Slave) | > |______________| |______________| > | | > |______________| > > So, I create the data, that should be send, in Layer A (Master) and send it > over RTnet to Layer D (Slave). > > I want to take the time when the data leaves A and when it arrives D with > rtdm_clock_read(). If I have the offset between master and slave, I can > calculate the time it took to pass A, B, both RTnet stacks, C and D. > > As RTnet keeps track of the offset in it's stack, I want to use this value. > Is > it possible via the API? I didn't found anything. Or do I have to manipulate > the stack to pass the offset to the higher layers (C and D)?
If RTmac/TDMA is in use, you can obtain the clock offset via RTMAC_RTIOC_TIMEOFFSET from the RTDM device "TDMA<x>" (where "<x>" corresponds to "rteth<x>"). Jan
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