Added previous sketch work
New Sketch with elapsedMicros in ISR
Corrected error for interval variables
Testing calibration variable
Cleaning up code

Serial Print values are finally making sense. There is a problem with
the ‘if’ statement that toggles the output - it doesn’t consistently
happen.
Streamlining Code

Trying direct port manipulations using the feb05c sketch.
Still got bugs which could be board variant related (Leo versus Uno)
Archiving
Revert 0003ec0..6b2e017

This rolls back to commit 0003ec06bd8ed3e7221f3780ef9c9c8c05deb418.
Revert 6b2e017..b4da9ce

This rolls back to commit 6b2e01708c5dbada2ae0dea5c6160472568b6f6c.
Added new macro Libraries

digitalFastWrite library - fail as it doesn’t work with Leo board
digitalIOPerformance library is the same as fastWrite and is Leo board
compatible
Feb_Changes

Finally figured out that the approach in the coding would not work for
this particular case. The learning experience however was great