AVR®: Using Pin Change Interrupts

 In this video:

  • Pin change IRQ's are used in low power board controllers.
  • Alternate functions of PORTB, including pin change IRQs.
  • Navigate the register map of the ATmega328P.
  • Enable an IRQ in the pin change Mask Register.
  • Enable the pin change IRQ in the pin change IRQ control register.
  • Determine the AVR® MCU status register enabling global IRQs.
  • Use AVR Libc support for IRQs (the required include, sei() and IRQ vector).
  • Test by hitting a breakpoint in the ISR.

Hands-On Training

Application Note - AN17644: Getting Started with AVR® Microcontroller

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