63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
|
|
*
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
#ifdef __MK20DX256__
|
|
|
|
#include "../../inc/MarlinConfig.h"
|
|
|
|
#if USE_WIRED_EEPROM
|
|
|
|
#include "../shared/eeprom_api.h"
|
|
|
|
bool PersistentStore::access_start() { return true; }
|
|
bool PersistentStore::access_finish() { return true; }
|
|
|
|
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
|
|
while (size--) {
|
|
uint8_t * const p = (uint8_t * const)pos;
|
|
uint8_t v = *value;
|
|
// EEPROM has only ~100,000 write cycles,
|
|
// so only write bytes that have changed!
|
|
if (v != eeprom_read_byte(p)) {
|
|
eeprom_write_byte(p, v);
|
|
if (eeprom_read_byte(p) != v) {
|
|
SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
|
|
return true;
|
|
}
|
|
}
|
|
crc16(crc, &v, 1);
|
|
pos++;
|
|
value++;
|
|
};
|
|
return false;
|
|
}
|
|
|
|
bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
|
|
do {
|
|
uint8_t c = eeprom_read_byte((uint8_t*)pos);
|
|
if (writing) *value = c;
|
|
crc16(crc, &c, 1);
|
|
pos++;
|
|
value++;
|
|
} while (--size);
|
|
return false;
|
|
}
|
|
|
|
#endif // USE_WIRED_EEPROM
|
|
#endif // __MK20DX256__
|