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