Stopwatch functionality

[cyrille de brébisson]

Hello,

Time/Date functions should be relatively accurate. But has a 1s granularity.

Ticks is much less accurate, but has a ~ms granularity.

From memory, both on G1 and G2, any drifts in Ticks should be consistent on a given unit at a given temperature. So, a good strategy would be to:
When user hits start: call ticks.
As time progresses, monitor "time". On a second change, take the ticks...
When the user hits stops, call ticks.
Take the first and last second change ticks. Use it to calculate the number of ticks per second. Do the ratio.

Cyrille