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81 lines
2.2 KiB
81 lines
2.2 KiB
/*
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EEPROM.cpp - esp8266 EEPROM emulation
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef EEPROM_h
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#define EEPROM_h
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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class EEPROMClass {
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public:
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EEPROMClass(uint32_t sector);
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EEPROMClass(void);
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void begin(size_t size);
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uint8_t read(int const address);
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void write(int const address, uint8_t const val);
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bool commit();
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void end();
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uint8_t * getDataPtr();
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uint8_t const * getConstDataPtr() const;
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template<typename T>
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T &get(int const address, T &t) {
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if (address < 0 || address + sizeof(T) > _size)
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return t;
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memcpy((uint8_t*) &t, _data + address, sizeof(T));
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return t;
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}
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template<typename T>
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const T &put(int const address, const T &t) {
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if (address < 0 || address + sizeof(T) > _size)
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return t;
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if (memcmp(_data + address, (const uint8_t*)&t, sizeof(T)) != 0) {
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_dirty = true;
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memcpy(_data + address, (const uint8_t*)&t, sizeof(T));
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}
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return t;
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}
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size_t length() {return _size;}
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uint8_t& operator[](int const address) {return getDataPtr()[address];}
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uint8_t const & operator[](int const address) const {return getConstDataPtr()[address];}
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protected:
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uint32_t _sector;
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uint8_t* _data;
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size_t _size;
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bool _dirty;
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};
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#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_EEPROM)
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extern EEPROMClass EEPROM;
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#endif
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#endif
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