does the arduino wire library use interrupts

Suppose for a moment that you wanted to do something else in loop() - something besides just reading a pin. What you're seeing here is nothing shocking or amazing - all the program is doing, over and over again, is running through loop(), and reading the value of buttonPin. read the state of the pushbutton value: initialize the pushbutton pin as an input: Int buttonState = 0 // variable for reading the pushbutton status Check out 'File > Examples > Digital > Button'.)Ĭonst int buttonPin = 2 // the number of the pushbutton pinĬonst int ledPin = 13 // the number of the LED pin (You can find this in the 'Examples' sketchbook. To start, we'll take a sketch you've likely seen before - the 'Button' example sketch included with all Arduinos. Let's start with a simple example - using an Interrupt to monitor a button press. Best of all, it frees up your processor for doing other stuff while it's waiting on an event to show up.

What's awesome about this is that it structures your system to react quickly and efficiently to important events that aren't easy to anticipate in software. Once that code has wrapped up, the processor goes back to whatever it was originally doing as if nothing happened! When a certain signal is detected, an Interrupt (as the name suggests) interrupts whatever the processor is doing, and executes some code designed to react to whatever external stimulus is being fed to the Arduino. An Interrupt's job is to make sure that the processor responds quickly to important events. Intermediate We Interrupt This Broadcast.Īs it turns out, there's a great (and underutilized) mechanism built into all Arduinos that is ideal for monitoring these kinds of real-time events.

Streamline your Arduino code with Interrupts - the simple way of reacting to real-time events! Recommended Level

Does the arduino wire library use interrupts