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digistump-sam/system/libsam/source/gpbr.c

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+/**
+ * \file
+ *
+ * \brief General Purpose Backup Registers (GPBR) driver for SAM.
+ *
+ * Copyright (c) 2011-2012 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * 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
+ * EXPRESSLY AND SPECIFICALLY 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.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "gpbr.h"
+
+/// @cond 0
+/**INDENT-OFF**/
+#ifdef __cplusplus
+extern "C" {
+#endif
+/**INDENT-ON**/
+/// @endcond
+
+/**
+ * \defgroup sam_drivers_gpbr_group General Purpose Backup Registers (GPBR)
+ *
+ * Driver for the General Purpose Backup Registers. This driver provides access 
+ * to the main features of the GPBR controller.
+ *
+ * @{
+ */
+
+/**
+ * \brief Read the specified backup register.
+ *
+ * \param ul_reg_num General purpose backup register number.
+ * 
+ * \return Value of the specified backup register.
+ */
+uint32_t gpbr_read(gpbr_num_t ul_reg_num)
+{
+	return GPBR->SYS_GPBR[ul_reg_num];
+}
+
+/**
+ * \brief Write a value to the specified backup register.
+ *
+ * \param ul_reg_num General purpose backup register number.
+ * \param ul_value Value to be written.
+ */
+void gpbr_write(gpbr_num_t ul_reg_num, uint32_t ul_value)
+{
+	GPBR->SYS_GPBR[ul_reg_num] = ul_value;
+}
+
+//@}
+
+/// @cond 0
+/**INDENT-OFF**/
+#ifdef __cplusplus
+}
+#endif
+/**INDENT-ON**/
+/// @endcond