/**
 * Copyright (c) 2022 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */ 

#include "pico/stdlib.h"
#include "stdio.h"

#define LED_PIN 11
#define BTN_PIN 26

volatile uint8_t counter = 0;
uint32_t ciclo;

void led_hertz(int hertz)
{
  int start_time = to_ms_since_boot(get_absolute_time());
  hertz = hertz * 2;
  while (to_ms_since_boot(get_absolute_time()) - start_time < 1000)
  {
    ciclo = 1000 / hertz;
    gpio_put(LED_PIN, 1);
    sleep_ms(ciclo);
    gpio_put(LED_PIN, 0);
    sleep_ms(ciclo);
  }
}

void blink_counter() {

  if (!gpio_get(BTN_PIN)) {
    counter++;
    printf("Botão pressionado");
    sleep_ms(10);
  }
  while (!gpio_get(BTN_PIN)) {
    sleep_ms(100); 
  }
  if (counter == 5){
    for (int i = 0; i <= 10; i++)
    {
      led_hertz(10);
      printf("Blinked for %d\n second(s)", i);
    }
    counter = 0;
  }    
}

int main() {
  gpio_init(LED_PIN);
  gpio_set_dir(LED_PIN, GPIO_OUT);

  gpio_init(BTN_PIN);
  gpio_set_dir(BTN_PIN, GPIO_IN);
  gpio_pull_up(BTN_PIN);

  while (true)
  {
    blink_counter();
    sleep_ms(1);
  }
}