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diff --git a/libopencm3/include/libopencm3/lpc43xx/eventrouter.h b/libopencm3/include/libopencm3/lpc43xx/eventrouter.h
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+++ b/libopencm3/include/libopencm3/lpc43xx/eventrouter.h
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+/** @defgroup eventrouter_defines Event Router Defines
+
+@brief <b>Defined Constants and Types for the LPC43xx Event Router</b>
+
+@ingroup LPC43xx_defines
+
+@version 1.0.0
+
+@author @htmlonly &copy; @endhtmlonly 2012 Michael Ossmann <mike@ossmann.com>
+
+@date 10 March 2013
+
+LGPL License Terms @ref lgpl_license
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LPC43XX_EVENTROUTER_H
+#define LPC43XX_EVENTROUTER_H
+
+/**@{*/
+
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/lpc43xx/memorymap.h>
+
+/* --- Event Router registers ---------------------------------------------- */
+
+/* Level configuration register */
+#define EVENTROUTER_HILO                MMIO32(EVENTROUTER_BASE + 0x000)
+
+/* Edge configuration */
+#define EVENTROUTER_EDGE                MMIO32(EVENTROUTER_BASE + 0x004)
+
+/* Clear event enable register */
+#define EVENTROUTER_CLR_EN              MMIO32(EVENTROUTER_BASE + 0xFD8)
+
+/* Set event enable register */
+#define EVENTROUTER_SET_EN              MMIO32(EVENTROUTER_BASE + 0xFDC)
+
+/* Event Status register */
+#define EVENTROUTER_STATUS              MMIO32(EVENTROUTER_BASE + 0xFE0)
+
+/* Event Enable register */
+#define EVENTROUTER_ENABLE              MMIO32(EVENTROUTER_BASE + 0xFE4)
+
+/* Clear event status register */
+#define EVENTROUTER_CLR_STAT            MMIO32(EVENTROUTER_BASE + 0xFE8)
+
+/* Set event status register */
+#define EVENTROUTER_SET_STAT            MMIO32(EVENTROUTER_BASE + 0xFEC)
+
+/**@}*/
+
+#endif