Tero's Arduino Blog

Using Arduino with Ada

Arduino Leonardo and (bad) USB interrupt

This is little heads-up for people, in case someone else also hits the same problem.

When playing with Arduino Leonardo, I noticed that if I enable interrupts, the code seems to freeze.

After some debugging and Google search, I found out that USB is turned on by the boot loader ...

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Reading button status via interrupt

The normal way to read the button is to read the input pin status in a loop and handle debouncing at the same time.

However, if you want to sleep most of the time, polling is not an option. Instead, you can use interrupts, like pin change interrupt (PCINTxx).

So ...

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