watchos/Util.cpp

#include <M5StickC.h>
#include "Util.h"

unsigned long millis_since(unsigned long timestamp)
{
  unsigned long now = millis();

  if (now < timestamp)
  {
    return (4294967295 - timestamp) + millis();
  }
  else
  {
    return millis() - timestamp;
  }
}

unsigned int rgb_to_colour(unsigned long colour)
{
  return M5.Lcd.color565(
    (colour >> 16) & 0xFF,
    (colour >> 8) & 0xFF,
    (colour) & 0xFF
    );
}