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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
#ifdef __PLAT_LINUX__
#include "../../inc/MarlinConfig.h"
#if ENABLED(EEPROM_SETTINGS)
#include "../shared/eeprom_api.h"
#include <stdio.h>
#ifndef MARLIN_EEPROM_SIZE
#define MARLIN_EEPROM_SIZE 0x1000 // 4KB of Emulated EEPROM
#endif
uint8_t buffer[MARLIN_EEPROM_SIZE];
char filename[] = "eeprom.dat";
size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; }
bool PersistentStore::access_start() {
const char eeprom_erase_value = 0xFF;
FILE * eeprom_file = fopen(filename, "rb");
if (!eeprom_file) return false;
fseek(eeprom_file, 0L, SEEK_END);
std::size_t file_size = ftell(eeprom_file);
if (file_size < MARLIN_EEPROM_SIZE) {
memset(buffer + file_size, eeprom_erase_value, MARLIN_EEPROM_SIZE - file_size);
}
else {
fseek(eeprom_file, 0L, SEEK_SET);
fread(buffer, sizeof(uint8_t), sizeof(buffer), eeprom_file);
}
fclose(eeprom_file);
return true;
}
bool PersistentStore::access_finish() {
FILE * eeprom_file = fopen(filename, "wb");
if (!eeprom_file) return false;
fwrite(buffer, sizeof(uint8_t), sizeof(buffer), eeprom_file);
fclose(eeprom_file);
return true;
}
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
std::size_t bytes_written = 0;
for (std::size_t i = 0; i < size; i++) {
buffer[pos+i] = value[i];
bytes_written ++;
}
crc16(crc, value, size);
pos = pos + size;
return (bytes_written != size); // return true for any error
}
bool PersistentStore::read_data(int &pos, uint8_t *value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
std::size_t bytes_read = 0;
if (writing) {
for (std::size_t i = 0; i < size; i++) {
value[i] = buffer[pos+i];
bytes_read ++;
}
crc16(crc, value, size);
}
else {
uint8_t temp[size];
for (std::size_t i = 0; i < size; i++) {
temp[i] = buffer[pos+i];
bytes_read ++;
}
crc16(crc, temp, size);
}
pos = pos + size;
return bytes_read != size; // return true for any error
}
#endif // EEPROM_SETTINGS
#endif // __PLAT_LINUX__
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