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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (C) 2019 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(USE_WATCHDOG)
-
- #include "watchdog_SAMD51.h"
-
- void watchdog_init(void) {
- // The low-power oscillator used by the WDT runs at 32,768 Hz with
- // a 1:32 prescale, thus 1024 Hz, though probably not super precise.
-
- // Setup WDT clocks
- MCLK->APBAMASK.bit.OSC32KCTRL_ = true;
- MCLK->APBAMASK.bit.WDT_ = true;
- OSC32KCTRL->OSCULP32K.bit.EN1K = true; // Enable out 1K (this is what WDT uses)
-
- WDT->CTRLA.bit.ENABLE = false; // Disable watchdog for config
- SYNC(WDT->SYNCBUSY.bit.ENABLE);
-
- WDT->INTENCLR.reg = WDT_INTENCLR_EW; // Disable early warning interrupt
- WDT->CONFIG.reg = WDT_CONFIG_PER_CYC4096; // Set at least 4s period for chip reset
-
- watchdog_reset();
-
- WDT->CTRLA.reg = WDT_CTRLA_ENABLE; // Start watchdog now in normal mode
- SYNC(WDT->SYNCBUSY.bit.ENABLE);
- }
-
- #endif // USE_WATCHDOG
-
- #endif // __SAMD51__
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