/*
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "drivers/watchdog.h"

#include "stm32f7xx.h"

void watchdog_init(void) {
  IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);

  IWDG_SetPrescaler(IWDG_Prescaler_64); // ~8 seconds
  IWDG_SetReload(0xfff);

  IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);

  DBGMCU_APB1PeriphConfig(DBGMCU_IWDG_STOP, ENABLE);
}

void watchdog_start(void) {
  IWDG_Enable();
  IWDG_ReloadCounter();
}

bool watchdog_check_reset_flag(void) {
  return RCC_GetFlagStatus(RCC_FLAG_IWDGRST) != RESET;
}