1/* Copyright (c) 2009  Dmitry Xmelkov
2   All rights reserved.
3
4   Redistribution and use in source and binary forms, with or without
5   modification, are permitted provided that the following conditions are met:
6
7   * Redistributions of source code must retain the above copyright
8     notice, this list of conditions and the following disclaimer.
9   * Redistributions in binary form must reproduce the above copyright
10     notice, this list of conditions and the following disclaimer in
11     the documentation and/or other materials provided with the
12     distribution.
13   * Neither the name of the copyright holders nor the names of
14     contributors may be used to endorse or promote products derived
15     from this software without specific prior written permission.
16
17   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27   POSSIBILITY OF SUCH DAMAGE.	*/
28
29/* $Id: eerd_word.S 1979 2009-06-05 23:08:14Z dmix $	*/
30
31#ifndef	__DOXYGEN__
32
33#include <avr/io.h>
34
35#if	E2END && __AVR_ARCH__ > 1
36
37#include <avr/eeprom.h>
38#include "asmdef.h"
39#include "eedef.h"
40
41/* uint16_t eeprom_read_word (const uint16_t *addr);
42 */
43
44ENTRY	eeprom_read_word
45
46#if  __AVR_XMEGA__
47
48	XCALL	eeprom_mapen
49	ld	r24, Z
50	ldd	r25, Z+1
51	ret
52
53#else
54
55	ldi	XL, 24		; start address to write: r24
56# if  RAMEND > 0xFF
57	ldi	XH, 0
58# endif
59
60	ldi	n_lo, lo8(2)
61# if  E2END > 0xFF
62	ldi	n_hi, hi8(2)
63# endif
64
65	XJMP	eeprom_read_blraw
66
67#endif
68
69ENDFUNC
70
71#endif	/* E2END && __AVR_ARCH__ > 1 */
72#endif	/* !__DOXYGEN__ */
73