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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * 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 <http://www.gnu.org/licenses/>.
- *
- */
-
- #ifdef __SAMD51__
-
- #include "../../inc/MarlinConfig.h"
-
- #if ENABLED(EEPROM_SETTINGS)
-
- #include "../shared/persistent_store_api.h"
-
- #if ENABLED(FLASH_EEPROM_EMULATION)
- #define NVMCTRL_CMD(c) do{ \
- SYNC(!NVMCTRL->STATUS.bit.READY); \
- NVMCTRL->INTFLAG.bit.DONE = true; \
- NVMCTRL->CTRLB.reg = c | NVMCTRL_CTRLB_CMDEX_KEY; \
- SYNC(NVMCTRL->INTFLAG.bit.DONE); \
- }while(0)
- #define NVMCTRL_FLUSH() do{ \
- if (NVMCTRL->SEESTAT.bit.LOAD) \
- NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_SEEFLUSH); \
- }while(0)
- #endif
-
- bool PersistentStore::access_start() {
- #if ENABLED(FLASH_EEPROM_EMULATION)
- NVMCTRL->SEECFG.reg = NVMCTRL_SEECFG_WMODE_BUFFERED; // Buffered mode and segment reallocation active
- #endif
-
- return true;
- }
-
- bool PersistentStore::access_finish() {
- #if ENABLED(FLASH_EEPROM_EMULATION)
- NVMCTRL_FLUSH();
- if (!NVMCTRL->SEESTAT.bit.LOCK)
- NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_LSEE); // Lock E2P data write access
- #endif
-
- return true;
- }
-
- bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
- #if ENABLED(FLASH_EEPROM_EMULATION)
- if (NVMCTRL->SEESTAT.bit.RLOCK)
- NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_USEE); // Unlock E2P data write access
- #endif
-
- while (size--) {
- const uint8_t v = *value;
- #if ENABLED(FLASH_EEPROM_EMULATION)
- SYNC(NVMCTRL->SEESTAT.bit.BUSY);
- if (NVMCTRL->INTFLAG.bit.SEESFULL)
- NVMCTRL_FLUSH(); // Next write will trigger a sector reallocation. I need to flush 'pagebuffer'
- ((volatile uint8_t *)SEEPROM_ADDR)[pos] = v;
- SYNC(!NVMCTRL->INTFLAG.bit.SEEWRC);
- #else
- uint8_t * const p = (uint8_t * const)pos;
- if (v != eeprom_read_byte(p)) {
- eeprom_write_byte(p, v);
- delay(2);
- if (eeprom_read_byte(p) != v) {
- SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
- return true;
- }
- }
- #endif
- 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*/) {
- while (size--) {
- uint8_t c;
- #if ENABLED(FLASH_EEPROM_EMULATION)
- SYNC(NVMCTRL->SEESTAT.bit.BUSY);
- c = ((volatile uint8_t *)SEEPROM_ADDR)[pos];
- #else
- c = eeprom_read_byte((uint8_t*)pos);
- #endif
- if (writing) *value = c;
- crc16(crc, &c, 1);
- pos++;
- value++;
- }
- return false;
- }
-
- size_t PersistentStore::capacity() {
- #if ENABLED(FLASH_EEPROM_EMULATION)
- const uint8_t psz = NVMCTRL->SEESTAT.bit.PSZ,
- sblk = NVMCTRL->SEESTAT.bit.SBLK;
-
- if (!psz && !sblk) return 0;
- else if (psz <= 2) return (0x200 << psz);
- else if (sblk == 1 || psz == 3) return 4096;
- else if (sblk == 2 || psz == 4) return 8192;
- else if (sblk <= 4 || psz == 5) return 16384;
- else if (sblk >= 9 && psz == 7) return 65536;
- else return 32768;
- #else
- return E2END + 1;
- #endif
- }
-
- #endif // EEPROM_SETTINGS
-
- #endif // __SAMD51__
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