add drift callback

Closes #232 (closed)

changed milestone to %Port Acquisition Server to Qt/QML

added Feature To Do labels

requested review from @tprampar

assigned to @trcabel

In the GTK version of the code, drift would stay very low on generated drivers like the generic oscilator.
However, I tested it and observed fast growing negative drift.
The report logged in the terminal is:

[  INF  ] Stats after 23.6719 second session of 512hz sampling (declared rate),  
[  INF  ]   Estimate : Driver samples at 5.1hz (1% of declared). 
[  INF  ]   Received : 120 samples.  
[  INF  ]   Expected : 12120 samples.  

This looks like a bug, maybe due to not calculating the drift each time samples are recorded...

added 1 commit

• 5af5674e - fix drift

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approved this merge request

mentioned in commit f7f721f3

merged