123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
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Copyright 2007, Freie Universitaet Berlin. All rights reserved.
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These sources were developed at the Freie Universität Berlin, Computer
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Systems and Telematics group.
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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 are
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met:
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- 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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- 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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- Neither the name of Freie Universitaet Berlin (FUB) nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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This software is provided by FUB and the contributors on an "as is"
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basis, without any representations or warranties of any kind, express
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or implied including, but not limited to, representations or
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warranties of non-infringement, merchantability or fitness for a
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particular purpose. In no event shall FUB or contributors be liable
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for any direct, indirect, incidental, special, exemplary, or
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consequential damages (including, but not limited to, procurement of
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substitute goods or services; loss of use, data, or profits; or
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business interruption) however caused and on any theory of liability,
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whether in contract, strict liability, or tort (including negligence
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or otherwise) arising in any way out of the use of this software, even
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if advised of the possibility of such damage.
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This implementation was developed by the CST group at the FUB.
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For documentation and questions please use the web site
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
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Berlin, 2007
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*/
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/**
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* @file infomem.c
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* @addtogroup storage
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* @brief MSP430 Infomemory Storage
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* @author Michael Baar <baar@inf.fu-berlin.de>
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*
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* Functions to store and read data from the two infomemories (2 x 128 Bytes).
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* Offset addresses start at zero, size has a maximum of 128, write operations
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* across both blocks are not allowed.
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*/
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#include <string.h>
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#include <stdarg.h>
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#include "contiki-conf.h"
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#include "infomem.h"
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void
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infomem_read(void *buffer, unsigned int offset, unsigned char size)
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{
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uint8_t *address = (uint8_t *)INFOMEM_START + offset;
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memcpy(buffer, address, size);
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}
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bool
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infomem_write(unsigned int offset, unsigned char count, ...)
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{
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char backup[INFOMEM_BLOCK_SIZE];
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uint8_t *buffer;
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uint16_t i;
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uint8_t *flash;
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va_list argp;
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uint16_t size;
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uint8_t *data;
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int s;
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if(offset > (2 * INFOMEM_BLOCK_SIZE)) {
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return FALSE;
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}
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flash = (uint8_t *)INFOMEM_START;
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s = splhigh();
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/* backup into RAM */
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memcpy(backup, flash, INFOMEM_BLOCK_SIZE);
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/* merge backup with new data */
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va_start(argp, count);
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buffer = (uint8_t *)backup + offset;
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for(i = 0; i < count; i++) {
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data = va_arg(argp, uint8_t *);
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size = va_arg(argp, uint16_t);
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memcpy(buffer, data, size);
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buffer += size;
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}
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va_end(argp);
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/* init flash access */
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FCTL2 = FWKEY + FSSEL1 + FN2;
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FCTL3 = FWKEY;
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/* erase flash */
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FCTL1 = FWKEY + ERASE;
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*flash = 0;
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/* write flash */
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FCTL1 = FWKEY + WRT;
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buffer = (uint8_t *)backup;
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for(i = 0; i < INFOMEM_BLOCK_SIZE; i++) {
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*flash++ = *buffer++;
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}
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FCTL1 = FWKEY;
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FCTL3 = FWKEY + LOCK;
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splx(s);
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return TRUE;
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}
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