Firmware2/Marlin/src/HAL/HAL_STM32F1/persistent_store_flash.cpp
2019-08-10 19:14:31 -05:00

93 lines
2.6 KiB
C++

/**
* Marlin 3D Printer Firmware
*
* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
* Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
*
* 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/>.
*
*/
/**
* persistent_store_flash.cpp
* HAL for stm32duino and compatible (STM32F1)
* Implementation of EEPROM settings in SDCard
*/
#ifdef __STM32F1__
#include "../../inc/MarlinConfig.h"
// This is for EEPROM emulation in flash
#if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
#include "../shared/persistent_store_api.h"
#include <flash_stm32.h>
#include <EEPROM.h>
// Store settings in the last two pages
// Flash pages must be erased before writing, so keep track.
bool firstWrite = false;
bool PersistentStore::access_start() {
firstWrite = true;
return true;
}
bool PersistentStore::access_finish() {
FLASH_Lock();
firstWrite = false;
return true;
}
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
FLASH_Status status;
if (firstWrite) {
FLASH_Unlock();
status = FLASH_ErasePage(EEPROM_PAGE0_BASE);
if (status != FLASH_COMPLETE) return true;
status = FLASH_ErasePage(EEPROM_PAGE1_BASE);
if (status != FLASH_COMPLETE) return true;
firstWrite = false;
}
for (size_t i = 0; i < size; i++) {
if (FLASH_ProgramHalfWord(EEPROM_PAGE0_BASE + (pos + i) * 2, value[i]) != FLASH_COMPLETE)
return true;
}
crc16(crc, value, size);
pos += size;
return false;
}
bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
for (size_t i = 0; i < size; i++) {
uint8_t v = *(uint16_t *)(EEPROM_PAGE0_BASE + (pos + i) * 2);
if (writing) value[i] = v;
crc16(crc, &v, 1);
}
pos += size;
return false;
}
size_t PersistentStore::capacity() { return size_t(E2END + 1); }
#endif // EEPROM_SETTINGS && EEPROM FLASH
#endif // __STM32F1__