79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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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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#include "../../inc/MarlinConfig.h"
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#if ENABLED(QSPI_EEPROM)
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#include "QSPIFlash.h"
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#define INVALID_ADDR 0xffffffff
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#define SECTOR_OF(a) (a & ~(SFLASH_SECTOR_SIZE - 1))
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#define OFFSET_OF(a) (a & (SFLASH_SECTOR_SIZE - 1))
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Adafruit_SPIFlashBase * QSPIFlash::_flashBase = nullptr;
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uint8_t QSPIFlash::_buf[SFLASH_SECTOR_SIZE];
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uint32_t QSPIFlash::_addr = INVALID_ADDR;
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void QSPIFlash::begin() {
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if (_flashBase != nullptr) return;
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_flashBase = new Adafruit_SPIFlashBase(new Adafruit_FlashTransport_QSPI());
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_flashBase->begin(NULL);
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}
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size_t QSPIFlash::size() {
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return _flashBase->size();
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}
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uint8_t QSPIFlash::readByte(const uint32_t address) {
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if (SECTOR_OF(address) == _addr) return _buf[OFFSET_OF(address)];
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return _flashBase->read8(address);
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}
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void QSPIFlash::writeByte(const uint32_t address, const uint8_t value) {
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uint32_t const sector_addr = SECTOR_OF(address);
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// Page changes, flush old and update new cache
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if (sector_addr != _addr) {
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flush();
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_addr = sector_addr;
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// read a whole page from flash
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_flashBase->readBuffer(sector_addr, _buf, SFLASH_SECTOR_SIZE);
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}
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_buf[OFFSET_OF(address)] = value;
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}
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void QSPIFlash::flush() {
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if (_addr == INVALID_ADDR) return;
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_flashBase->eraseSector(_addr / SFLASH_SECTOR_SIZE);
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_flashBase->writeBuffer(_addr, _buf, SFLASH_SECTOR_SIZE);
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_addr = INVALID_ADDR;
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}
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#endif // QSPI_EEPROM
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