[etherlab-users] EtherCAT Master used from user mode

[Andy Rohr]

Andre Puschmann schrieb:
> Hi Andy,
> 
> Andy Rohr wrote:
>> Yes, I tried. I used the EtherCAT-Master 1.5 from userspace with a 
>> RT_PREEMPT-Kernel and even with a standard kernel with success.
> What does "with success" mean? Did it _just_ run with a PREEMPT kernel 
> or did it reduce/optimize any real-time parameters (e.g. latency, jitter)?
> Did you perform any measurements?

"Just run". I did not perform any realtime-performance measurements as you might expect, but:
I am using EtherCAT to register "events" (changes of state of an digital Input) and timestamping 
them with an accuracy of <5ms relative to an NTP-Server. I can fulfill this requirement, proven by 
my measurements (recording and comparing the timestamps of two independent, NTP-synchronized systems 
receiving the same signal).

> 
> Thanks in advance.
> 
> 
> Best regards,
> Andre
> 

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