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