95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#include "../platforms.h"
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#ifdef HAL_STM32
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/**
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* Implementation of EEPROM settings in SD Card
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*/
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(SDCARD_EEPROM_EMULATION)
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#include "../shared/eeprom_api.h"
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#include "../../sd/cardreader.h"
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#define EEPROM_FILENAME "eeprom.dat"
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#ifndef MARLIN_EEPROM_SIZE
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#define MARLIN_EEPROM_SIZE 0x1000 // 4KB
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#endif
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size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; }
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#define _ALIGN(x) __attribute__ ((aligned(x)))
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static char _ALIGN(4) HAL_eeprom_data[MARLIN_EEPROM_SIZE];
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bool PersistentStore::access_start() {
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if (!card.isMounted()) return false;
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SdFile file, root = card.getroot();
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if (!file.open(&root, EEPROM_FILENAME, O_RDONLY))
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return true;
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int bytes_read = file.read(HAL_eeprom_data, MARLIN_EEPROM_SIZE);
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if (bytes_read < 0) return false;
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for (; bytes_read < MARLIN_EEPROM_SIZE; bytes_read++)
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HAL_eeprom_data[bytes_read] = 0xFF;
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file.close();
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return true;
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}
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bool PersistentStore::access_finish() {
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if (!card.isMounted()) return false;
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SdFile file, root = card.getroot();
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int bytes_written = 0;
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if (file.open(&root, EEPROM_FILENAME, O_CREAT | O_WRITE | O_TRUNC)) {
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bytes_written = file.write(HAL_eeprom_data, MARLIN_EEPROM_SIZE);
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file.close();
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}
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return (bytes_written == MARLIN_EEPROM_SIZE);
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}
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bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
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for (size_t i = 0; i < size; i++)
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HAL_eeprom_data[pos + i] = value[i];
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crc16(crc, value, size);
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pos += size;
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return false;
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}
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bool PersistentStore::read_data(int &pos, uint8_t *value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
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for (size_t i = 0; i < size; i++) {
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uint8_t c = HAL_eeprom_data[pos + i];
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if (writing) value[i] = c;
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crc16(crc, &c, 1);
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}
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pos += size;
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return false;
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}
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#endif // SDCARD_EEPROM_EMULATION
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#endif // HAL_STM32
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