![]() One thing that trips those new to the AVR timer is the clock source. Timers can be configured to produce outputs directly to pre-determined pins, reducing the processing load on the AVR core. This is a fancy way of saying that the timers are separate circuits on the AVR chip which can run independent of the main program, interacting via the control and count registers, and the timer interrupts. The AVR timers are very useful as they can run asynchronous to the main AVR core. ![]() AVR timers do a similar job, measuring a given time interval. A simple clock will time the seconds, minutes and hours elapsed in a given day - or in the case of a twelve hour clock, since the last half-day. We use timers every day - the most simple one can be found on your wrist. However, despite the surface complexity, the function of the timer subsystem can be condensed into one obvious function: to time. They have a myriad of uses ranging from simple delay intervals right up to complex PWM (more on this later) generation. The timer systems on the AVR series of Microcontrollers are complex beasts. What are they, and what can they do for us? For an updated version of this tutorial in PDF format, please see this page of my website.Īt last! Yet another tutorial, this one covering a topic which is the main source of frustration to those new with AVRs timers.
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