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-rwxr-xr-xcores/arduino/wiring.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/cores/arduino/wiring.h b/cores/arduino/wiring.h
index edc9704..d0ce1c3 100755
--- a/cores/arduino/wiring.h
+++ b/cores/arduino/wiring.h
@@ -57,7 +57,12 @@ extern "C"{
#define FALLING 2
#define RISING 3
+#if defined(__AVR_ATmega1280__)
+#define INTERNAL1V1 2
+#define INTERNAL2V56 3
+#else
#define INTERNAL 3
+#endif
#define DEFAULT 1
#define EXTERNAL 0