/**
* Marlin 3D Printer Firmware
*
* Copyright (C) 2016 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 ENABLED(EEPROM_SETTINGS) && ENABLED(FLASH_EEPROM_EMULATION)
#include "../persistent_store_api.h"
#include <flash_stm32.h>
#include <EEPROM.h>
namespace HAL {
namespace PersistentStore {
namespace {
// Store settings in the last two pages
// Flash pages must be erased before writing, so keep track.
bool firstWrite = false;
uint32_t pageBase = EEPROM_START_ADDRESS;
}
bool access_start() {
firstWrite = true;
return true;
bool access_finish() {
FLASH_Lock();
firstWrite = false;
bool write_data(int &pos, const uint8_t *value, uint16_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);
// First write full words
int i = 0;
int wordsToWrite = size / sizeof(uint16_t);
uint16_t* wordBuffer = (uint16_t *)value;
while (wordsToWrite) {
status = FLASH_ProgramHalfWord(pageBase + pos + (i * 2), wordBuffer[i]);
wordsToWrite--;
i++;
// Now, write any remaining single byte
if (size & 1) {
uint16_t temp = value[size - 1];
status = FLASH_ProgramHalfWord(pageBase + pos + i, temp);
crc16(crc, value, size);
pos += ((size + 1) & ~1);
return false;
bool read_data(int &pos, uint8_t* value, uint16_t size, uint16_t *crc, const bool writing/*=true*/) {
for (uint16_t i = 0; i < size; i++) {
byte* accessPoint = (byte*)(pageBase + pos + i);
uint8_t c = *accessPoint;
if (writing) value[i] = c;
crc16(crc, &c, 1);
} // PersistentStore
} // HAL
#endif // EEPROM_SETTINGS && EEPROM FLASH
#endif // __STM32F1__