[EFM32] Microsecond ticker optimization #2666
Merged
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Cleaned up the EFM32 us_ticker implementation since it was taking way too long to execute, leading to very unpredictable results. About a 4x speedup by optimizing out a long division.
Relevant forum thread: [https://developer.mbed.org/forum/platform-66-EFM32-Zero-Gecko-community/topic/26198/]