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diff --git a/ext/InterruptIn.h b/ext/InterruptIn.h
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+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_INTERRUPTIN_H
+#define MBED_INTERRUPTIN_H
+
+#include "platform.h"
+
+#if DEVICE_INTERRUPTIN
+
+#include "gpio_api.h"
+#include "gpio_irq_api.h"
+#include "FunctionPointer.h"
+
+namespace mbed {
+
+/** A digital interrupt input, used to call a function on a rising or falling edge
+ *
+ * Example:
+ * @code
+ * // Flash an LED while waiting for events
+ *
+ * #include "mbed.h"
+ *
+ * InterruptIn event(p16);
+ * DigitalOut led(LED1);
+ *
+ * void trigger() {
+ *     printf("triggered!\n");
+ * }
+ *
+ * int main() {
+ *     event.rise(&trigger);
+ *     while(1) {
+ *         led = !led;
+ *         wait(0.25);
+ *     }
+ * }
+ * @endcode
+ */
+class InterruptIn {
+
+public:
+
+    /** Create an InterruptIn connected to the specified pin
+     *
+     *  @param pin InterruptIn pin to connect to
+     *  @param name (optional) A string to identify the object
+     */
+    InterruptIn(PinName pin);
+    virtual ~InterruptIn();
+
+     int read();
+#ifdef MBED_OPERATORS
+    operator int();
+
+#endif
+
+    /** Attach a function to call when a rising edge occurs on the input
+     *
+     *  @param fptr A pointer to a void function, or 0 to set as none
+     */
+    void rise(void (*fptr)(void));
+
+    /** Attach a member function to call when a rising edge occurs on the input
+     *
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
+     */
+    template<typename T>
+    void rise(T* tptr, void (T::*mptr)(void)) {
+        _rise.attach(tptr, mptr);
+        gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
+    }
+
+    /** Attach a function to call when a falling edge occurs on the input
+     *
+     *  @param fptr A pointer to a void function, or 0 to set as none
+     */
+    void fall(void (*fptr)(void));
+
+    /** Attach a member function to call when a falling edge occurs on the input
+     *
+     *  @param tptr pointer to the object to call the member function on
+     *  @param mptr pointer to the member function to be called
+     */
+    template<typename T>
+    void fall(T* tptr, void (T::*mptr)(void)) {
+        _fall.attach(tptr, mptr);
+        gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
+    }
+
+    /** Set the input pin mode
+     *
+     *  @param mode PullUp, PullDown, PullNone
+     */
+    void mode(PinMode pull);
+
+    /** Enable IRQ. This method depends on hw implementation, might enable one
+     *  port interrupts. For further information, check gpio_irq_enable().
+     */
+    void enable_irq();
+
+    /** Disable IRQ. This method depends on hw implementation, might disable one
+     *  port interrupts. For further information, check gpio_irq_disable().
+     */
+    void disable_irq();
+
+    static void _irq_handler(uint32_t id, gpio_irq_event event);
+
+protected:
+    gpio_t gpio;
+    gpio_irq_t gpio_irq;
+
+    FunctionPointer _rise;
+    FunctionPointer _fall;
+};
+
+} // namespace mbed
+
+#endif
+
+#endif