Nils Kemper wrote: > Hello, > I want to synchronize the nodes on a rtnet-network. If I understand it right > I > can use waitinfo.clock_offset, which is the offset between the master-clock > and the slave-clock.
Yep, master = slave + offset. There is also RTMAC_RTIOC_TIMEOFFSET to get the offset asynchronously. > In a first test it seems, that waitinfo.clock_offset is always positiv, so I > can't tell, if the slave is "before" or "after" the master-clock. Is that > right? (hm, maybe I lose somewhere the sign ...) Try powering on the slave a bit before the master, then negative offsets should be observable. > > Second (maybe stupid) question: is "unsigned long long" a correct equivalent > to RTIME? Better use "uint64_t"? Or which other type on a 32bit x86 > Linux-system? The cleanest equivalent to RTIME is RTIME. Means, you should use it as consequently as possible. Only when exchanging data with some instance that doesn't know that type definition, switching to another, common type is recommended. Using explicit sizes like uint64_t then helps to safely pass architecture borders. Jan
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