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diff --git a/peripherals/irq/irq.h b/peripherals/irq/irq.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+/// 
+/// Methods and definitions for configuring interrupts.
+/// 
+/// !Usage
+///
+/// -# Configure an interrupt source using IRQ_ConfigureIT
+/// -# Enable or disable interrupt generation of a particular source with
+///    IRQ_EnableIT and IRQ_DisableIT.
+///
+/// \note Most of the time, peripheral interrupts must be also configured
+/// inside the peripheral itself.
+//------------------------------------------------------------------------------
+
+#ifndef IRQ_H
+#define IRQ_H
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#include <board.h>
+#if defined(cortexm3)
+#include <core_cm3.h>
+#endif
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+#if 0
+#if defined(cortexm3)
+#ifdef __NVIC_PRIO_BITS
+#undef __NVIC_PRIO_BITS
+#define __NVIC_PRIO_BITS           ((SCB->AIRCR & 0x700) >> 8) 
+#endif
+#endif
+#endif
+
+//------------------------------------------------------------------------------
+//         Global functions
+//------------------------------------------------------------------------------
+
+extern void IRQ_ConfigureIT(unsigned int source,
+                            unsigned int mode,         // mode for AIC, priority for NVIC
+                            void( *handler )( void )); // ISR
+
+extern void IRQ_EnableIT(unsigned int source);
+
+extern void IRQ_DisableIT(unsigned int source);
+
+#endif //#ifndef IRQ_H
+