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diff --git a/libopencm3/include/libopencm3/stm32/f3/crc.h b/libopencm3/include/libopencm3/stm32/f3/crc.h
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+/** @defgroup crc_defines CRC Defines
+ *
+ * @brief <b>Defined Constants and Types for the STM32F3xx CRC Generator </b>
+ *
+ * @ingroup STM32F3xx_defines
+ *
+ * @version 1.0.0
+ *
+ * @date 18 August 2012
+ *
+ * LGPL License Terms @ref lgpl_license
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * 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 LIBOPENCM3_CRC_H
+#define LIBOPENCM3_CRC_H
+
+#include <libopencm3/stm32/common/crc_common_all.h>
+
+/* --- CRC registers ------------------------------------------------------- */
+
+/* Initial CRC value (CRC_INIT) */
+#define CRC_INIT MMIO32(CRC_BASE + 0x10)
+
+/* CRC polynomial (CRC_POL) */
+#define CRC_POL MMIO32(CRC_BASE + 0x14)
+
+/* --- CRC_CR values ------------------------------------------------------- */
+
+/* REV_OUT: Reverse output data */
+#define CRC_CR_REV_OUT (1 << 7)
+
+/* REV_IN[1:0]: Reverse input data */
+#define CRC_CR_REV_IN_NOT_AFFECTED (0x0 << 5)
+#define CRC_CR_REV_IN_BYTE (0x1 << 5)
+#define CRC_CR_REV_IN_HALF_WORD (0x2 << 5)
+#define CRC_CR_REV_IN_WORD (0x3 << 5)
+
+/* POLYSIZE[1:0]: Polynomial size */
+#define CRC_CR_POLYSIZE_32 (0x0 << 3)
+#define CRC_CR_POLYSIZE_16 (0x1 << 3)
+#define CRC_CR_POLYSIZE_8 (0x2 << 3)
+#define CRC_CR_POLYSIZE_7 (0x3 << 3)
+
+/* --- CRC_INIT values ----------------------------------------------------- */
+
+/* Bits 31:0 CRC_INIT: Programmable initial CRC value */
+
+/* --- CRC_POL values ------------------------------------------------------ */
+
+/* Bits 31:0 POL[31:0]: Programmable polynomial */
+
+#endif