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+/* This file has been prepared for Doxygen automatic documentation generation.*/

+/*! \file *********************************************************************

+ *

+ * \brief  XMEGA EEPROM driver header file.

+ *

+ *      This file contains the function prototypes and enumerator definitions

+ *      for various configuration parameters for the XMEGA EEPROM driver.

+ *

+ *      The driver is not intended for size and/or speed critical code, since

+ *      most functions are just a few lines of code, and the function call

+ *      overhead would decrease code performance. The driver is intended for

+ *      rapid prototyping and documentation purposes for getting started with

+ *      the XMEGA EEPROM module.

+ *

+ *      For size and/or speed critical code, it is recommended to copy the

+ *      function contents directly into your application instead of making

+ *      a function call.

+ *

+ * \par Application note:

+ *      AVR1315: Accessing the XMEGA EEPROM

+ *

+ * \par Documentation

+ *      For comprehensive code documentation, supported compilers, compiler

+ *      settings and supported devices see readme.html

+ *

+ * \author

+ *      Atmel Corporation: http://www.atmel.com \n

+ *      Support email: avr@atmel.com

+ *

+ * $Revision: 1569 $

+ * $Date: 2008-04-22 13:03:43 +0200 (ti, 22 apr 2008) $  \n

+ *

+ * 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:

+ *

+ * 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.

+ *

+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED

+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 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.

+ *****************************************************************************/

+#ifndef EEPROM_DRIVER_H

+#define EEPROM_DRIVER_H

+

+#include "avr_compiler.h"

+

+#define MAPPED_EEPROM_START 0x1000

+#define EEPROM_PAGESIZE 32

+#define EEPROM(_pageAddr, _byteAddr) \

+	((uint8_t *) MAPPED_EEPROM_START)[_pageAddr*EEPROM_PAGESIZE + _byteAddr]

+

+

+

+/* Definitions of macros. */

+

+/*! \brief Enable EEPROM block sleep-when-not-used mode.

+ *

+ *  This macro enables power reduction mode for EEPROM.

+ *  It means that the EEPROM block is disabled when not used.

+ *  Note that there will be a penalty of 6 CPU cycles if EEPROM

+ *  is accessed.

+ */

+#define EEPROM_EnablePowerReduction() ( NVM.CTRLB |= NVM_EPRM_bm )

+

+/*! \brief Disable EEPROM block sleep-when-not-used mode.

+ *

+ *  This macro disables power reduction mode for EEPROM.

+ */

+#define EEPROM_DisablePowerReduction() ( NVM.CTRLB &= ~NVM_EPRM_bm )

+

+/*! \brief Enable EEPROM mapping into data space.

+ *

+ *  This macro enables mapping of EEPROM into data space.

+ *  EEPROM starts at EEPROM_START in data memory. Read access

+ *  can be done similar to ordinary SRAM access.

+ *

+ *  \note This disables IO-mapped access to EEPROM, although page erase and

+ *        write operations still needs to be done through IO register.

+ */

+#define EEPROM_EnableMapping() ( NVM.CTRLB |= NVM_EEMAPEN_bm )

+

+/*! \brief Disable EEPROM mapping into data space.

+ *

+ *  This macro disables mapping of EEPROM into data space.

+ *  IO mapped access is now enabled.

+ */

+#define EEPROM_DisableMapping() ( NVM.CTRLB &= ~NVM_EEMAPEN_bm )

+

+/*! \brief Non-Volatile Memory Execute Command

+ *

+ *  This macro set the CCP register before setting the CMDEX bit in the

+ *  NVM.CTRLA register.

+ *

+ *  \note The CMDEX bit must be set within 4 clock cycles after setting the

+ *        protection byte in the CCP register.

+ */

+#define NVM_EXEC()	asm("push r30"      "\n\t"	\

+			    "push r31"      "\n\t"	\

+    			    "push r16"      "\n\t"	\

+    			    "push r18"      "\n\t"	\

+			    "ldi r30, 0xCB" "\n\t"	\

+			    "ldi r31, 0x01" "\n\t"	\

+			    "ldi r16, 0xD8" "\n\t"	\

+			    "ldi r18, 0x01" "\n\t"	\

+			    "out 0x34, r16" "\n\t"	\

+			    "st Z, r18"	    "\n\t"	\

+    			    "pop r18"       "\n\t"	\

+			    "pop r16"       "\n\t"	\

+			    "pop r31"       "\n\t"	\

+			    "pop r30"       "\n\t"	\

+			    )

+

+/* Prototyping of functions. */

+void EEPROM_WriteByte( uint8_t pageAddr, uint8_t byteAddr, uint8_t value );

+uint8_t EEPROM_ReadByte( uint8_t pageAddr, uint8_t byteAddr );

+void EEPROM_WaitForNVM( void );

+void EEPROM_FlushBuffer( void );

+void EEPROM_LoadByte( uint8_t byteAddr, uint8_t value );

+void EEPROM_LoadPage( const uint8_t * values );

+void EEPROM_AtomicWritePage( uint8_t pageAddr );

+void EEPROM_ErasePage( uint8_t pageAddress );

+void EEPROM_SplitWritePage( uint8_t pageAddr );

+void EEPROM_EraseAll( void );

+

+#endif