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[More about software timers…]
One-shot timers versus auto-reload timersThere are two types of timer, one-shot timers, and auto-reload timers. Once started, a one-shot timer will execute its callback function only once. It can be manually re-started, but will not automatically re-start itself. Conversely, once started, an auto-reload timer will automatically re-start itself after each execution of its callback function, resulting in periodic callback execution.
The difference in behaviour between a one-shot timer and an auto-reload timer is demonstrated by the timeline in the diagram below. In this diagram, Timer 1 is a one-shot timer that has a period equal to 100, and Timer 2 is an auto-reload timer that has a period equal to 200.
The behaviour of one-shot timers and auto-reload timers