internalflashc.nc

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// $Id: InternalFlashC.nc,v 1.3 2004/07/26 18:42:09 jwhui Exp $

/*									tab:4
 *
 *
 * "Copyright (c) 2000-2004 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 */

/**
 * InternalFlashC.nc - Internal flash implementation for the avr
 * platform.
 *
 * Valid address range is 0x0 - 0xFFF.
 *
 * @author Jonathan Hui <[e-mail]>
 */

includes InternalFlash;

module InternalFlashC {
  provides interface InternalFlash;
}

implementation {

  enum {
    IFLASH_BOUND_LOW  = 0x000,
    IFLASH_BOUND_HIGH = 0xfff,
  };

  command result_t InternalFlash.write(void* addr, void* buf, uint16_t size) {

    uint8_t *addrPtr = (uint8_t*)addr;
    uint8_t *bufPtr = (uint8_t*)buf;
    uint16_t i;

    if ((uint16_t)addr < IFLASH_BOUND_LOW || IFLASH_BOUND_HIGH + 2 <= (uint16_t)addr + size)
      return FAIL;

    for ( i = 0; i < size; i++ ) {
      eeprom_write_byte(addrPtr, *bufPtr);
      addrPtr++;
      bufPtr++;
    }

    while(!eeprom_is_ready());

    return SUCCESS;

  }

  command result_t InternalFlash.read(void* addr, void* buf, uint16_t size) {

    uint8_t *addrPtr = (uint8_t*)addr;
    uint8_t *bufPtr = (uint8_t*)buf;
    uint16_t i;

    if ((uint16_t)addr < IFLASH_BOUND_LOW || IFLASH_BOUND_HIGH + 2 <= (uint16_t)addr + size)
      return FAIL;

    for ( i = 0; i < size; i++ ) {
      *bufPtr = eeprom_read_byte(addrPtr);
      addrPtr++;
      bufPtr++;
    }

    return SUCCESS;

  }

}