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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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