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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 <https://www.gnu.org/licenses/>.
- *
- */
- #ifdef __SAMD51__
-
- #include "../../inc/MarlinConfig.h"
-
- #if ENABLED(FLASH_EEPROM_EMULATION)
-
- #include "../shared/eeprom_api.h"
-
- #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)
-
- size_t PersistentStore::capacity() {
- const uint8_t psz = NVMCTRL->SEESTAT.bit.PSZ,
- sblk = NVMCTRL->SEESTAT.bit.SBLK;
-
- return (!psz && !sblk) ? 0
- : (psz <= 2) ? (0x200 << psz)
- : (sblk == 1 || psz == 3) ? 4096
- : (sblk == 2 || psz == 4) ? 8192
- : (sblk <= 4 || psz == 5) ? 16384
- : (sblk >= 9 && psz == 7) ? 65536
- : 32768;
- }
-
- bool PersistentStore::access_start() {
- NVMCTRL->SEECFG.reg = NVMCTRL_SEECFG_WMODE_BUFFERED; // Buffered mode and segment reallocation active
- if (NVMCTRL->SEESTAT.bit.RLOCK)
- NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_USEE); // Unlock E2P data write access
- return true;
- }
-
- bool PersistentStore::access_finish() {
- NVMCTRL_FLUSH();
- if (!NVMCTRL->SEESTAT.bit.LOCK)
- NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_LSEE); // Lock E2P data write access
- return true;
- }
-
- bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
- while (size--) {
- const uint8_t v = *value;
- 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);
- 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--) {
- SYNC(NVMCTRL->SEESTAT.bit.BUSY);
- uint8_t c = ((volatile uint8_t *)SEEPROM_ADDR)[pos];
- if (writing) *value = c;
- crc16(crc, &c, 1);
- pos++;
- value++;
- }
- return false;
- }
-
- #endif // FLASH_EEPROM_EMULATION
- #endif // __SAMD51__
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