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