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: eeupd_block.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/* void eeprom_update_block (const void *sram, void *eepr, size_t n) 42 */ 43 44#define sram_lo r24 45#define eepr_lo r22 46 47ENTRY eeprom_update_block 48 49#if RAMEND > 0xFF || E2END > 0xFF 50 X_movw XL, sram_lo 51 add XL, n_lo 52 adc XH, n_hi 53 subi n_lo, lo8(1) 54 sbci n_hi, hi8(1) 55#else 56 mov XL, sram_lo 57 add XL, n_lo 58 subi n_lo, lo8(1) 59#endif 60 brlo 3f 61 62#if E2END > 0xFF 63 X_movw addr_lo, eepr_lo 64 add addr_lo, n_lo 65 adc addr_hi, n_hi 66#else 67 mov addr_lo, eepr_lo 68 add addr_lo, n_lo 69#endif 70 711: ld r18, -X 72 XCALL eeprom_update_r18 732: subi n_lo, lo8(1) 74 75#if RAMEND > 0xFF || E2END > 0xFF 76 sbci n_hi, hi8(1) 77#endif 78 79 brsh 1b 803: ret 81 82ENDFUNC 83 84#endif /* E2END && __AVR_ARCH__ > 1 */ 85#endif /* !__DOXYGEN__ */ 86