Ethercat random jitter fix

With refClockSyncCycles="-1" the value of the ecat.0.pll_reset_cnt pin is continuously increasing, it never stops, it increases in a positive direction more and more, in a short time it was already at 20,000

with  refClockSyncCycles="1" the pin ecat.0.pll_reset_cn remain stable = 0

can you run ethercat master a few times consecutively while running with

refClockSyncCycles="-1"

and paste here the DC reference and the App time values?

at least 3~4 consecutive times please

do the same for 

refClockSyncCycles="1"

What parameters should I check?

the name the pin

Sorry, not a pin

it is the output to the terminal when you send this command
ethercat master
in a terminal window

it will list various things, I am interested in DC reference, and APP time, they are near the end

ethercat master command outputs
Master0
Phase: Operation
Active: yes
Slaves: 20
Ethernet devices:
Main: 00:e0:b4:68:34:0a (attached)
....
...
...
Distributed clocks:
Reference clock: Slave 0
DC reference time: 829391683702736097
Application time: 829391693979787340


the above is what I'd like to see, thank you
 

I have commit a small change to enable you to set drive 1 as the reference clock please update the code from 

github.com/grandixximo/linuxcnc-ethercat

and run with this xml 


and confirm that DC reference clock is slave 1 and not 0 by running

ethercat master

in a terminal, I expect

Reference clock: Slave 1