Firmware2/Marlin/src/HAL/HAL_STM32F1/persistent_store_flash.cpp
2019-02-12 15:30:11 -06:00

108 lines
3.1 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 ENABLED(EEPROM_SETTINGS) && ENABLED(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;
uint32_t pageBase = EEPROM_START_ADDRESS;
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, const 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;
}
// 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]);
if (status != FLASH_COMPLETE) return true;
wordsToWrite--;
i++;
}
// Now, write any remaining single byte
if (size & 1) {
uint16_t temp = value[size - 1];
status = FLASH_ProgramHalfWord(pageBase + pos + i, temp);
if (status != FLASH_COMPLETE) return true;
}
crc16(crc, value, size);
pos += ((size + 1) & ~1);
return false;
}
bool PersistentStore::read_data(int &pos, uint8_t* value, const size_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);
}
pos += ((size + 1) & ~1);
return false;
}
size_t PersistentStore::capacity() { return E2END + 1; }
#endif // EEPROM_SETTINGS && EEPROM FLASH
#endif // __STM32F1__