Low-level access to STM32 peripherals using JavaScript

ACCESSING THE TIMER

...

So the counter is actually counting up.

COUNTING EDGES

So that was interesting, but not really useful. What if we wanted to actually count the amount of times a pin changed state?

Why would you call this ...not really useful? - Is there a better way do make a rpm or frequency counter/display? ...using a read/reset the count, setInterval() or setTimeout() of a particular value, read the count, do the math, show the rpms/frequency?

CAPACITIVE TOUCH SENSOR

Input capture really shines when you use it alongside another timer channel on the same timer.

Would that qualify for a component to build a Theremin-like instrument? ...recalling some discussion/post when @Gordon asked for PICO applications and then made the game for moving a ring around a crazy bent wire without touching?