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https://github.com/RIOT-OS/RIOT.git
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108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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* Copyright (C) 2019 Inria
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_native
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* @ingroup drivers_periph_eeprom
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* @{
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*
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* @file
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* @brief Low-level EEPROM driver implementation for native
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*
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* @author Alexandre Abadie <alexandre.abadie@inria.fr>
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* @}
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "native_internal.h"
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#include "cpu.h"
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#include "mutex.h"
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#include "periph/eeprom.h"
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#include "eeprom_native.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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char eeprom_file[EEPROM_FILEPATH_MAX_LEN];
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static uint8_t _eeprom_buf[EEPROM_SIZE] = { EEPROM_CLEAR_BYTE };
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static mutex_t lock = MUTEX_INIT;
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static inline void eeprom_native_write(void)
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{
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FILE *fp = real_fopen(eeprom_file, "w");
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if (!fp) {
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return;
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}
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DEBUG("Writing data to EEPROM file %s:\n", eeprom_file);
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fwrite(_eeprom_buf, 1, ARRAY_SIZE(_eeprom_buf), fp);
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if (IS_ACTIVE(ENABLE_DEBUG)) {
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for (size_t i = 0; i < ARRAY_SIZE(_eeprom_buf); i++) {
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DEBUG("0x%02X ", _eeprom_buf[i]);
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if ((i + 1) % 16 == 0) {
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DEBUG("\n");
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}
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}
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DEBUG("\n");
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}
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fclose(fp);
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}
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void eeprom_native_read(void)
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{
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FILE *fp = real_fopen(eeprom_file, "r");
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if (!fp) {
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return;
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}
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DEBUG("Reading data from EEPROM file %s:\n", eeprom_file);
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fread(_eeprom_buf, 1, ARRAY_SIZE(_eeprom_buf), fp);
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if (IS_ACTIVE(ENABLE_DEBUG)) {
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for (size_t i = 0; i < ARRAY_SIZE(_eeprom_buf); i++) {
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DEBUG("0x%02X ", _eeprom_buf[i]);
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if ((i + 1) % 16 == 0) {
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DEBUG("\n");
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}
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}
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DEBUG("\n");
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}
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fclose(fp);
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}
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size_t eeprom_read(uint32_t pos, void *data, size_t len)
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{
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assert(pos + len <= EEPROM_SIZE);
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mutex_lock(&lock);
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memcpy(data, &_eeprom_buf[pos], len);
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mutex_unlock(&lock);
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return len;
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}
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size_t eeprom_write(uint32_t pos, const void *data, size_t len)
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{
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assert(pos + len <= EEPROM_SIZE);
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mutex_lock(&lock);
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memcpy(&_eeprom_buf[pos], data, len);
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mutex_unlock(&lock);
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/* Persist to the file */
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eeprom_native_write();
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return len;
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}
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