LKM Timemark Driver
mlewis000 at rogers.com
Wed Aug 29 07:37:49 UTC 2018
I've put my fancy do everything LKM Timemark driver tool on hold.
Instead, I robbed that code to work towards a robust LKM Timemark Echo
more suitable for use in making an ntpsec clock driver.
As was suggested to me, the timestamp of the outgoing Timemark trigger
pulse is bracketed, a timespec tv_pre set and a timespec tv_post set.
You can monitor their width, calculate an 'actual', use a Kalman filter
or just use the post timestamp. Includes a sequence number.
Pulse width can be specified, and the pulse can be set to be Positive or
Three modes, Timemark pulse goes out upon:
- receiving a PPS (echo)
- timed to trigger at x ms past system time TOS (no PPS required)
- timed to trigger every x ms (no PPS required)(someone wants to be able
to trigger at a spacing a little more than a whole second)
It's coming along nicely and may be released this week.
Single outgoing port for now, so only one Timemark can be driven for
those modules that have more.
It will do what the ublox M8 series need, as that's what I have and can
test against it. I hope that features can be added to allow other module
types to be driven.
As it's a LKM, anyone can mod it to their needs, load and run it,
without needing a system patch.
Have I missed any obvious driver features?
More information about the devel