Added arduino libs

libraries/EnableInterrupt/utility/ei_External328.h

@@ -0,0 +1,45 @@
+#if ! defined(EI_NOTINT0) && ! defined(EI_NOTINT1)
+#ifdef EI_SECTION_ENABLEEXTERNAL
+#ifndef EI_NOTINT0
+if (arduinoPin == 2) {
+#ifndef NEEDFORSPEED
+  functionPointerArrayEXTERNAL[0] = userFunction;
+#endif
+  EIMSK &= ~_BV(0);
+  EICRA &= (~_BV(0) & ~_BV(1));
+  EICRA |= mode;
+  EIFR  |= _BV(0); // using a clue from the ATmega2560 datasheet.
+  EIMSK |= _BV(0);
+}
+#endif
+#ifndef EI_NOTINT1
+if (arduinoPin == 3) {
+#ifndef NEEDFORSPEED
+  functionPointerArrayEXTERNAL[1] = userFunction;
+#endif
+  EIMSK &= ~_BV(1);
+  EICRA &= (~_BV(2) & ~_BV(3));
+  EICRA |= mode << 2;
+  EIFR  |= _BV(1); // using a clue from the ATmega2560 datasheet.
+  EIMSK |= _BV(1);
+}
+#endif
+#endif // EI_SECTION_ENABLEEXTERNAL
+
+#ifdef EI_SECTION_DISABLEEXTERNAL
+#ifndef EI_NOTINT0
+if (arduinoPin == 2) {
+  EIMSK &= ~_BV(0);
+  EICRA &= (~_BV(0) & ~_BV(1));
+  EIFR  |= _BV(0); // using a clue from the ATmega2560 datasheet.
+}
+#endif
+#ifndef EI_NOTINT1
+if (arduinoPin == 3) {
+  EIMSK &= ~_BV(1);
+  EICRA &= (~_BV(2) & ~_BV(3));
+  EIFR  |= _BV(1); // using a clue from the ATmega2560 datasheet.
+} 
+#endif
+#endif // EI_SECTION_DISABLEEXTERNAL
+#endif // ! defined(EI_NOTINT0) && ! defined(EI_NOTINT1)