92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)$Id: xmem.c,v 1.1 2007/02/02 14:08:22 bg- Exp $
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*/
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/*
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* External memory built from the AVR eeprom. It is incredibly slow!
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*/
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#include <stdio.h>
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#include <avr/eeprom.h>
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#include "contiki.h"
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#include "dev/xmem.h"
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#if 0
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...) do {} while (0)
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#endif
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/*
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*/
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void
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xmem_init(void)
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{
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PRINTF("xmem_init\n");
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}
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int
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xmem_pread(void *_p, int size, off_t offset)
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{
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PRINTF("xmem_pread(%p, %d, %06lx)\n", _p, size, offset);
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spl_t s = splhigh();
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eeprom_busy_wait();
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eeprom_read_block(_p, (void *)(uintptr_t)offset, size);
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splx(s);
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return size;
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}
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int
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xmem_pwrite(const void *_p, int size, off_t offset)
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{
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PRINTF("xmem_pwrite(%p, %d, %06lx)\n", _p, size, offset);
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spl_t s = splhigh();
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eeprom_busy_wait();
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eeprom_write_block(_p, (void *)(uintptr_t)offset, size);
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splx(s);
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return size;
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}
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int
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xmem_erase(long size, off_t offset)
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{
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/*
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* AVR internal eeprom has a kind of auto erase, thus nothing is
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* done here.
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*/
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PRINTF("xmem_erase(%ld, %06lx)\n", size, offset);
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return size;
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}
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