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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * 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/>.
- *
- */
- #ifdef __STM32F1__
-
- #include "../../inc/MarlinConfig.h"
-
- #if USE_WIRED_EEPROM
-
- /**
- * PersistentStore for Arduino-style EEPROM interface
- * with simple implementations supplied by Marlin.
- */
-
- #include "../shared/eeprom_if.h"
- #include "../shared/eeprom_api.h"
-
- #ifndef MARLIN_EEPROM_SIZE
- #error "MARLIN_EEPROM_SIZE is required for I2C / SPI EEPROM."
- #endif
- size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; }
-
- bool PersistentStore::access_finish() { return true; }
-
- bool PersistentStore::access_start() {
- eeprom_init();
- #if ENABLED(SPI_EEPROM)
- #if SPI_CHAN_EEPROM1 == 1
- SET_OUTPUT(BOARD_SPI1_SCK_PIN);
- SET_OUTPUT(BOARD_SPI1_MOSI_PIN);
- SET_INPUT(BOARD_SPI1_MISO_PIN);
- SET_OUTPUT(SPI_EEPROM1_CS);
- #endif
- spiInit(0);
- #endif
- return true;
- }
-
- bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
- while (size--) {
- uint8_t * const p = (uint8_t * const)pos;
- uint8_t v = *value;
- // EEPROM has only ~100,000 write cycles,
- // so only write bytes that have changed!
- if (v != eeprom_read_byte(p)) {
- eeprom_write_byte(p, v);
- if (eeprom_read_byte(p) != v) {
- SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
- return true;
- }
- }
- crc16(crc, &v, 1);
- pos++;
- value++;
- };
- return false;
- }
-
- bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
- do {
- uint8_t c = eeprom_read_byte((uint8_t*)pos);
- if (writing && value) *value = c;
- crc16(crc, &c, 1);
- pos++;
- value++;
- } while (--size);
- return false;
- }
-
- #endif // USE_WIRED_EEPROM
- #endif // __STM32F1__
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