[etherlab-users] example code

[Curt]

Sorry for the newbie questions.

I've downloaded built and installed the ethercat master 1.5.2.

Used the generic driver to communicated with an Beckhoff EK1101 hub, EL1034 
digital input and EL2034 digital output.

I then modified the ./example/user/main.c code to work with these modules.  
Seems to work OK.   I then  looped the digital out to a digital in to some 
basic performance testing.

At a update rate of 1kHz (1 millisecond), it can detect a change on average of 
about 2 ms.    I increased the rate to 2kHz,  it can detect a change on 
average of 1ms, BUT, I see an occasional, "EtherCAT WARNING: Datagram da69fecc 
(domain0-0-main) was SKIPPED 1 time".   I don't see this warning at a 1kHz 
update rate.   

Are these reasonable results, and does this imply that the fastest rate I can 
expect without errors/warnings is 1 kHz?

Would I get significantly better results using the Ethercat kernel module for 
my chipset?


Thanks,

Curt Fiene
Cybermetrix