Metro library for Arduino or Wiring that facilitates the implementation of recurring timed events.
MIT License (MIT) Copyright (c) 2012 Thomas O Fredericks
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• Added "this->autoreset = 0; to Metro(unsigned long interval_millis)" as suggested by Paul Bouchier
• Put the Metro folder in your Arduino "libraries".
Metro(unsigned long interval)
Instantiates a Metro object with a set interval in milliseconds with no autoreset
Metro(unsigned long interval, byte autoreset)
Instantiates a Metro object with a set interval in milliseconds. If the autoreset is set to true (1), the internal timer will reset, ignoring missed events. If you want to catch up with missed events (because you don't call the check method regularly), set autoreset to false.
Because Metro does not use interrupts, you have to "check" the Metro regularly (at least every millisecond). check() returns true if the interval has lapsed. Returns false if not.
void interval(unsigned long interval)
Changes the interval in milliseconds.
Restarts/resets the Metro.
void delay(long millis)
delays the triggering of the next successful check() for the specified amount of milliseconds.
void delayFromNow(long millis)
delays the triggering of the next successful check() for the specified amount of milliseconds after now. After millis() + the specified milliseconds the Metro goes back to normal operation