### Implementing Watchdog Timer as an Alarm Clock in C++

Source: https://github.com/gyverlibs/gyverwdt/blob/main/README_EN.md

This example demonstrates using the Gyverwdt library to implement a 'watchdog alarm clock' functionality. It configures the WDT in interrupt mode with a specific prescaler (128) to wake the microcontroller from a low-power sleep mode (PWR_DOWN). The `ISR(Watchdog)` routine disables sleep and the WDT upon waking, allowing the main loop to continue execution and blink an LED.

```C++
#include <gyverwdt.h>
#include <avr/sleep.h>

/*
   An example of using Watchdog in the "alarm clock"
   Dependence of Tymauts on dividers, see gyverwdt.h
*/

VOID setup () {
  Pinmode (13, output);
  set_sleep_mode (Sleep_mode_pwr_down);// Select the desired sleep mode
}

VOID loop () {

  / * We blink a LED, and we sleep in pauses */
  DigitalWrite (13, High);

  Watchdog.enable (Interrupt_mode, WDT_PRESCALER_128);// interruption mode, timaut ~ 1c
  Sleep_enable ();// We allow a dream
  Sleep_cpu ();// We go to sleep

  digitalWrite (13, LOW);

  Watchdog.enable (Interrupt_mode, WDT_PRESCALER_128);// interruption mode, timaut ~ 1c
  Sleep_enable ();// We allow sleep
  Sleep_cpu ();// We go to sleep

}

/ * Interruption Watchdog, in it we wake up */
ISR (Watchdog) {
  Sleep_disable ();// We prohibit sleep
  Watchdog.disable ();// Turn off Watchdog
}
```

--------------------------------

### Configuring Watchdog Timer Functions in C++

Source: https://github.com/gyverlibs/gyverwdt/blob/main/README_EN.md

This snippet outlines the core functions provided by the Gyverwdt library for Watchdog Timer (WDT) management. It includes functions to reset, disable, and enable the WDT, with `Enable` requiring a `Mode` (reset, interrupt, or interrupt-then-reset) and a `Prescaler` for timeout duration. These functions allow fine-grained control over WDT behavior on AVR microcontrollers.

```C++
VOID Reset (VOID);// Reset
VOID DISABLE (VOID);// Disable WDT
VOID Enable (Uint8_t Mode, Uint8_t PressCaler);// Turn on WDT with settings
// Mode:
// reset_mode - reset during freezing (at a time -out WDT)
// Interrupt_Mode - interruption when freezing (at a time -out WDT)
// Interrupt_Reset_Mode - first timout - interruption, second - reset
// PressCaler:
// wdt_prescaler_2, wdt_prescaler_4 ... wdt_prescaler_1024
```

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