Abstcact

The EICRA/EIMSK are registers to control external interrupts.

Source Code

The EICRA and EIMSK are defined in hardware/tools/avr/avr/include/avr/iom328p.h as below.

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#define EICRA _SFR_MEM8(0x69)
#define ISC00 0
#define ISC01 1
#define ISC10 2
#define ISC11 3

#define EIMSK _SFR_IO8(0x1D)
#define INT0 0
#define INT1 1

They call _SFR_MEM8() and _SFR_IO8().

Version

7.3.0-atmel3.6.1-arduino7

Last Update

May 15, 2021