72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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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 TARGET_LPC1768
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#include "../../inc/MarlinConfig.h"
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#if ENABLED(USE_WATCHDOG)
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#include <lpc17xx_wdt.h>
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#include "watchdog.h"
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void watchdog_init() {
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#if ENABLED(WATCHDOG_RESET_MANUAL)
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// We enable the watchdog timer, but only for the interrupt.
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// Configure WDT to only trigger an interrupt
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// Disable WDT interrupt (just in case, to avoid triggering it!)
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NVIC_DisableIRQ(WDT_IRQn);
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// We NEED memory barriers to ensure Interrupts are actually disabled!
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// ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
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__DSB();
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__ISB();
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// Configure WDT to only trigger an interrupt
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// Initialize WDT with the given parameters
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WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
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// Configure and enable WDT interrupt.
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NVIC_ClearPendingIRQ(WDT_IRQn);
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NVIC_SetPriority(WDT_IRQn, 0); // Use highest priority, so we detect all kinds of lockups
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NVIC_EnableIRQ(WDT_IRQn);
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#else
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WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
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#endif
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WDT_Start(WDT_TIMEOUT);
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}
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void HAL_watchdog_refresh() {
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WDT_Feed();
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#if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
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TOGGLE(LED_PIN); // heartbeat indicator
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#endif
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}
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// Timeout state
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bool watchdog_timed_out() { return TEST(WDT_ReadTimeOutFlag(), 0); }
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void watchdog_clear_timeout_flag() { WDT_ClrTimeOutFlag(); }
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#endif // USE_WATCHDOG
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#endif // TARGET_LPC1768
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