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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| /* | ||
| EEPROM.cpp - ESP31B EEPROM emulation | ||
| Copyright (c) 2014 Ivan Grokhotkov. All rights reserved. | ||
| This file is part of the ESP31B core for Arduino environment. | ||
| This library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public | ||
| License as published by the Free Software Foundation; either | ||
| version 2.1 of the License, or (at your option) any later version. | ||
| This library is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with this library; if not, write to the Free Software | ||
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #include "Arduino.h" | ||
| #include "EEPROM.h" | ||
|
|
||
| extern "C" { | ||
| #include "esp_spi_flash.h" | ||
| } | ||
|
|
||
| EEPROMClass::EEPROMClass(uint32_t sector) | ||
| : _sector(sector) | ||
| , _data(0) | ||
| , _size(0) | ||
| , _dirty(false) | ||
| { | ||
| } | ||
|
|
||
| void EEPROMClass::begin(size_t size) | ||
| { | ||
| if (size <= 0) { | ||
| return; | ||
| } | ||
| if (size > SPI_FLASH_SEC_SIZE) { | ||
| size = SPI_FLASH_SEC_SIZE; | ||
| } | ||
|
|
||
| size = (size + 3) & (~3); | ||
|
|
||
| if (_data) { | ||
| delete[] _data; | ||
| } | ||
|
|
||
| _data = new uint8_t[size]; | ||
| _size = size; | ||
|
|
||
| noInterrupts(); | ||
| spi_flash_read(_sector * SPI_FLASH_SEC_SIZE, reinterpret_cast<uint32_t*>(_data), _size); | ||
| interrupts(); | ||
| } | ||
|
|
||
| void EEPROMClass::end() | ||
| { | ||
| if (!_size) { | ||
| return; | ||
| } | ||
|
|
||
| commit(); | ||
| if(_data) { | ||
| delete[] _data; | ||
| } | ||
| _data = 0; | ||
| _size = 0; | ||
| } | ||
|
|
||
|
|
||
| uint8_t EEPROMClass::read(int address) | ||
| { | ||
| if (address < 0 || (size_t)address >= _size) { | ||
| return 0; | ||
| } | ||
| if(!_data) { | ||
| return 0; | ||
| } | ||
|
|
||
| return _data[address]; | ||
| } | ||
|
|
||
| void EEPROMClass::write(int address, uint8_t value) | ||
| { | ||
| if (address < 0 || (size_t)address >= _size) { | ||
| return; | ||
| } | ||
| if(!_data) { | ||
| return; | ||
| } | ||
|
|
||
| _data[address] = value; | ||
| _dirty = true; | ||
| } | ||
|
|
||
| bool EEPROMClass::commit() | ||
| { | ||
| bool ret = false; | ||
| if (!_size) { | ||
| return false; | ||
| } | ||
| if(!_dirty) { | ||
| return true; | ||
| } | ||
| if(!_data) { | ||
| return false; | ||
| } | ||
|
|
||
| noInterrupts(); | ||
| if(spi_flash_erase_sector(_sector) == ESP_OK) { | ||
| if(spi_flash_write(_sector * SPI_FLASH_SEC_SIZE, reinterpret_cast<uint32_t*>(_data), | ||
| _size) == ESP_OK) { | ||
| _dirty = false; | ||
| ret = true; | ||
| } | ||
| } | ||
| interrupts(); | ||
|
|
||
| return ret; | ||
| } | ||
|
|
||
| uint8_t * EEPROMClass::getDataPtr() | ||
| { | ||
| _dirty = true; | ||
| return &_data[0]; | ||
| } | ||
|
|
||
| extern "C" uint32_t _SPIFFS_end; | ||
| EEPROMClass EEPROM(SPIFFS_END_ADDRESS / SPI_FLASH_SEC_SIZE); |
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