69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
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* Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
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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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#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(SRAM_EEPROM_EMULATION)
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#include "../shared/eeprom_if.h"
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#include "../shared/eeprom_api.h"
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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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bool PersistentStore::access_start() { return true; }
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bool PersistentStore::access_finish() { return true; }
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bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
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while (size--) {
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uint8_t v = *value;
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// Save to Backup SRAM
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*(__IO uint8_t *)(BKPSRAM_BASE + (uint8_t * const)pos) = v;
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crc16(crc, &v, 1);
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pos++;
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value++;
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};
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return false;
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}
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bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
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do {
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// Read from either external EEPROM, program flash or Backup SRAM
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const uint8_t c = ( *(__IO uint8_t *)(BKPSRAM_BASE + ((uint8_t*)pos)) );
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if (writing) *value = c;
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crc16(crc, &c, 1);
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pos++;
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value++;
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} while (--size);
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return false;
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}
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#endif // SRAM_EEPROM_EMULATION
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#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
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