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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* 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 TARGET_LPC1768
#include "../../inc/MarlinConfig.h"
#if ENABLED(USE_WATCHDOG)
#include <lpc17xx_wdt.h>
#include "watchdog.h"
#define WDT_TIMEOUT_US TERN(WATCHDOG_DURATION_8S, 8000000, 4000000) // 4 or 8 second timeout
void watchdog_init() {
#if ENABLED(WATCHDOG_RESET_MANUAL)
// We enable the watchdog timer, but only for the interrupt.
// Configure WDT to only trigger an interrupt
// Disable WDT interrupt (just in case, to avoid triggering it!)
NVIC_DisableIRQ(WDT_IRQn);
// We NEED memory barriers to ensure Interrupts are actually disabled!
// ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
__DSB();
__ISB();
// Configure WDT to only trigger an interrupt
// Initialize WDT with the given parameters
WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
// Configure and enable WDT interrupt.
NVIC_ClearPendingIRQ(WDT_IRQn);
NVIC_SetPriority(WDT_IRQn, 0); // Use highest priority, so we detect all kinds of lockups
NVIC_EnableIRQ(WDT_IRQn);
#else
WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
#endif
WDT_Start(WDT_TIMEOUT_US);
}
void HAL_watchdog_refresh() {
WDT_Feed();
#if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
TOGGLE(LED_PIN); // heartbeat indicator
#endif
}
// Timeout state
bool watchdog_timed_out() { return TEST(WDT_ReadTimeOutFlag(), 0); }
void watchdog_clear_timeout_flag() { WDT_ClrTimeOutFlag(); }
#endif // USE_WATCHDOG
#endif // TARGET_LPC1768
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