mirror of
https://github.com/MarlinFirmware/Marlin.git
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109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (c) 2019 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 <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* persistent_store_flash.cpp
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* HAL for stm32duino and compatible (STM32F1)
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* Implementation of EEPROM settings in SDCard
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*/
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#ifdef __STM32F1__
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#include "../../inc/MarlinConfig.h"
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// This is for EEPROM emulation in flash
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#if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
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#include "../shared/persistent_store_api.h"
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#include <flash_stm32.h>
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#include <EEPROM.h>
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// Store settings in the last two pages
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// Flash pages must be erased before writing, so keep track.
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bool firstWrite = false;
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uint32_t pageBase = EEPROM_START_ADDRESS;
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bool PersistentStore::access_start() {
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firstWrite = true;
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return true;
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}
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bool PersistentStore::access_finish() {
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FLASH_Lock();
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firstWrite = false;
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return true;
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}
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bool PersistentStore::write_data(int &pos, const uint8_t *value, const size_t size, uint16_t *crc) {
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FLASH_Status status;
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if (firstWrite) {
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FLASH_Unlock();
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status = FLASH_ErasePage(EEPROM_PAGE0_BASE);
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if (status != FLASH_COMPLETE) return true;
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status = FLASH_ErasePage(EEPROM_PAGE1_BASE);
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if (status != FLASH_COMPLETE) return true;
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firstWrite = false;
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}
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// First write full words
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int i = 0;
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int wordsToWrite = size / sizeof(uint16_t);
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uint16_t* wordBuffer = (uint16_t *)value;
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while (wordsToWrite) {
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status = FLASH_ProgramHalfWord(pageBase + pos + (i * 2), wordBuffer[i]);
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if (status != FLASH_COMPLETE) return true;
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wordsToWrite--;
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i++;
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}
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// Now, write any remaining single byte
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const uint16_t odd = size & 1;
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if (odd) {
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uint16_t temp = value[size - 1];
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status = FLASH_ProgramHalfWord(pageBase + pos + i, temp);
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if (status != FLASH_COMPLETE) return true;
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}
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crc16(crc, value, size);
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pos += size + odd;
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return false;
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}
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bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
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for (uint16_t i = 0; i < size; i++) {
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byte* accessPoint = (byte*)(pageBase + pos + i);
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uint8_t c = *accessPoint;
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if (writing) value[i] = c;
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crc16(crc, &c, 1);
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}
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pos += ((size + 1) & ~1); // i.e., size+(size&1), round up odd values
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return false;
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}
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size_t PersistentStore::capacity() { return E2END + 1; }
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#endif // EEPROM_SETTINGS && EEPROM FLASH
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#endif // __STM32F1__
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