KIR Interrupts.ino

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This file contains a number of functions for handling interrupts and related items.

  • KIR_initPCINT - this function initialises the MCU to handle the required PIINTs on the COL pins only. Col pins are set to INPUT_PULLUP and when a button is pressed the COL pin is pulled low, by the respective ROW pin. The resulting interrupt wakes the MCU up from sleep.
  • KIR_enablePCint - this function clears any PCINT flags and enables interrupts for the COL pins.
  • KIR_disablePCint - this function clears any PCINT flags and disables interrupts for the COL pins. However, we do not use/call this function and simply disable PCINT every time withing the PCINT ISRs.



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