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/* Copyright (c) 2009 Dmitry Xmelkov
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* 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.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 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. */
# $Id: readme_eeprom.txt,v 1.1.2.2 2009/06/20 07:23:15 dmix Exp $
Register usage of internally-used functions, common archs:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eeprom_read_blraw:
Input:
r27,r26 - data space address (destination)
r25,r24 - EEPROM address
r21,r20 - number of bytes
Scratch:
common call-used regs.
eeprom_update_r18:
Input:
r18 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - decremented EEPROM address
Scratch:
r0
eeprom_update_byte:
Input:
r22 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - decremented EEPROM address
Scratch:
r18,r0
eeprom_write_r18:
Input:
r18 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - incremented EEPROM address
Scratch:
r0
eeprom_write_byte:
Input:
r22 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - incremented EEPROM address
Scratch:
r18,r0
Register usage of internally-used functions, XMEGA arch:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eeprom_mapen:
Input:
r25,r24 - EEPROM address
Output:
ZH,ZL - EEPROM address + 0x2000 (to use mapping)
Scratch:
r19
eeprom_update_r18:
Input:
r18 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - decremented EEPROM address
Scratch:
r31,r30,r19,r18,r0
eeprom_update_byte:
Input:
r22 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - decremented EEPROM address
Scratch:
r31,r30,r19,r18,r0
eeprom_write_r18:
Input:
r18 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - incremented EEPROM address
Scratch:
r31,r30,r19,r18
eeprom_write_byte:
Input:
r22 - byte to write
r25,r24 - EEPROM address
Output:
r25,r24 - incremented EEPROM address
Scratch:
r31,r30,r19,r18
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