Add first implementation of attchInterrupts

Need to check actual C++ implementation to understand if we can do it

Author: facchinm

cores/arduino/Interrupts.cpp

@@ -0,0 +1,32 @@
+/*
+  Copyright (c) 2012 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "Arduino.h"
+
+void attachInterruptParam(pin_size_t interruptNum, voidFuncPtrParam func, PinStatus mode, void* param) {
+  // need to check if destructor also destroys the callback object
+  if (mode == FALLING) {
+    InterruptIn((PinName)interruptNum).fall(callback(func, param));
+  } else {
+    InterruptIn((PinName)interruptNum).rise(callback(func, param));
+  }
+}
+
+void attachInterrupt(pin_size_t interruptNum, voidFuncPtr func, PinStatus mode) {
+  attachInterruptParam(interruptNum, (voidFuncPtrParam)func, mode, NULL);
+}