Is your feature request related to a problem? Please describe. Some Arduino sensors work by reading a pulse for HIGH and LOW on a digital pin.

The current implementation is obviously broken and I think it should be fixed using (optimized) compiler-agnostic asm code. This should fix the backwards-compatibility problem. In a long term view it ...

Almost every electronic hobbyist must have faced a scenario where he or she must measure the frequency of a signal generated by a clock or a counter, or a timer. We can use an oscilloscope to do the ...