Regular timing at >= 1024 micros an easy way

Community General Discussion
1

It occurred to me that while the low 8 bits of millis() is +/-1,

that every 1024 micros, millis() does change by 1 or 2.

So if in a non-blocked void loop() with global byte prevMs,

  byte nowMs = millis(); 
  if ( prevMs != nowMs )
  {
    // do the every 1024 usec event
    prevMs = nowMs;
  }

no subtract required!

I should change my fast debounce to 1024us intervals!

2

...prevents the compiler from promoting to int before comparing (AVR processors). That should save, I think, four machine instructions.

3

This is a place where the "optimizing" compiler can't take my more efficient choice then? It's right up there with 16-bit bools where 8-bit saves RAM to represent 1 bit of data!

int int int int int int int int int int int int int int int int int int int int
misses the h every time!