randellhodges
5 years ago
committed by
GitHub
GitHub
29 changed files with 132 additions and 210 deletions
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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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/**
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* I2C/SPI EEPROM interface for LPC1768 |
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*/ |
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#ifdef TARGET_LPC1768 |
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#include "../../inc/MarlinConfig.h" |
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#if USE_WIRED_EEPROM |
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#include "../shared/eeprom_api.h" |
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#include <Wire.h> |
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#ifndef EEPROM_SIZE |
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#define EEPROM_SIZE 0x8000 // 32kB
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#endif |
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bool PersistentStore::access_start() { |
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TERN_(SPI_EEPROM, eeprom_init()); |
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return true; |
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} |
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bool PersistentStore::access_finish() { return true; } |
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bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) { |
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while (size--) { |
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uint8_t v = *value; |
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// EEPROM has only ~100,000 write cycles,
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// so only write bytes that have changed!
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uint8_t * const p = (uint8_t * const)pos; |
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if (v != eeprom_read_byte(p)) { |
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eeprom_write_byte(p, v); |
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if (eeprom_read_byte(p) != v) { |
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SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE); |
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return true; |
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} |
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} |
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crc16(crc, &v, 1); |
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pos++; |
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value++; |
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}; |
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return false; |
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} |
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bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) { |
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do { |
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// Read from external EEPROM
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const uint8_t c = eeprom_read_byte((uint8_t*)pos); |
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if (writing) *value = c; |
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crc16(crc, &c, 1); |
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pos++; |
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value++; |
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} while (--size); |
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return false; |
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} |
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size_t PersistentStore::capacity() { return EEPROM_SIZE; } |
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#endif // USE_WIRED_EEPROM
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#endif // TARGET_LPC1768
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