To handle timer rollovers the test tests-mbed_hal-common_tickers_freq
calls intf->set_interrupt(0). For this to work correctly the ticker
implementation must fire an interrupt on every rollover event though
intf->set_interrupt(0) was called only once. Whether an interrupt will
fire only once or multiple times is undefined behavior which
cannot be relied upon.
To avoid this undefined behavior this patch continually schedules an
interrupt and performs overflow detection on every read. This also
removes the possibility of race conditions due to overflowCounter
incrementing at the wrong time.
FastModels targets are simulator running on the x86 hosts.
As the nature of non-RealTime x86 OS and FastModels, timing accuracy is not guaranteed
So skipping the time drifting tests on FastModel targets
Martin Kojtal
Qinghao Shi
Russ Butler
jeromecoutant
Bartek Szatkowski