unexplained large time corrections

Description

Every now and then (every 20min?), motes print error messages indicating that their time correction is large. A couple of observations:

  • sometimes this happens in bursts, for both motes

  • the number of ticks can be always the same (e.g. always either 14 or 25 ticks)

  • sometimes this results in the mote(s) desynchronizing.

In the design of the IEEE802.15.4e layer all radio/timing activity happens in an ISR, so there should be very little jitter on the timing.

This is totally strange and we should get 100% to the bottom of this before dealing with (potentially more complex) timing-related tasks such as FW-10.

Environment

1 DAGroot, 2 motes. Forcing topology to a linear network.

Assignee

Thomas Watteyne

Reporter

Thomas Watteyne

Labels

None

Story Points

None

Fix versions

Affects versions

Priority

Critical
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