102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 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 <http://www.gnu.org/licenses/>.
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*
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*/
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#ifdef __PLAT_LINUX__
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(EEPROM_SETTINGS)
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#include "../shared/persistent_store_api.h"
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#include <stdio.h>
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uint8_t buffer[E2END];
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char filename[] = "eeprom.dat";
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bool PersistentStore::access_start() {
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const char eeprom_erase_value = 0xFF;
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FILE * eeprom_file = fopen(filename, "rb");
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if (eeprom_file == nullptr) return false;
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fseek(eeprom_file, 0L, SEEK_END);
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std::size_t file_size = ftell(eeprom_file);
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if (file_size < E2END) {
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memset(buffer + file_size, eeprom_erase_value, E2END - file_size);
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}
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else {
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fseek(eeprom_file, 0L, SEEK_SET);
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fread(buffer, sizeof(uint8_t), sizeof(buffer), eeprom_file);
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}
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fclose(eeprom_file);
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return true;
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}
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bool PersistentStore::access_finish() {
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FILE * eeprom_file = fopen(filename, "wb");
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if (eeprom_file == nullptr) return false;
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fwrite(buffer, sizeof(uint8_t), sizeof(buffer), eeprom_file);
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fclose(eeprom_file);
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return true;
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}
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bool PersistentStore::write_data(int &pos, const uint8_t *value, const size_t size, uint16_t *crc) {
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std::size_t bytes_written = 0;
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for (std::size_t i = 0; i < size; i++) {
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buffer[pos+i] = value[i];
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bytes_written ++;
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}
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crc16(crc, value, size);
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pos = pos + size;
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return (bytes_written != size); // return true for any error
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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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std::size_t bytes_read = 0;
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if (writing) {
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for (std::size_t i = 0; i < size; i++) {
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value[i] = buffer[pos+i];
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bytes_read ++;
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}
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crc16(crc, value, size);
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}
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else {
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uint8_t temp[size];
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for (std::size_t i = 0; i < size; i++) {
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temp[i] = buffer[pos+i];
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bytes_read ++;
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}
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crc16(crc, temp, size);
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}
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pos = pos + size;
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return bytes_read != size; // return true for any error
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}
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size_t PersistentStore::capacity() { return 4096; } // 4KiB of Emulated EEPROM
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#endif // EEPROM_SETTINGS
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#endif // __PLAT_LINUX__
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