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-rw-r--r--variants/leonardo/pins_arduino.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/variants/leonardo/pins_arduino.h b/variants/leonardo/pins_arduino.h
index fe736f5..be9d0f2 100644
--- a/variants/leonardo/pins_arduino.h
+++ b/variants/leonardo/pins_arduino.h
@@ -133,6 +133,8 @@
extern const uint8_t PROGMEM analog_pin_to_channel_PGM[];
#define analogPinToChannel(P) ( pgm_read_byte( analog_pin_to_channel_PGM + (P) ) )
+#define digitalPinToInterrupt(p) ((p) == 0 ? 2 : ((p) == 1 ? 3 : ((p) == 2 ? 1 : ((p) == 3 ? 0 : ((p) == 7 ? 4 : NOT_AN_INTERRUPT)))))
+
#ifdef ARDUINO_MAIN
// On the Arduino board, digital pins are also used