/**
 * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

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

volatile int g_timer_0 = 0;

bool timer_0_callback(repeating_timer_t *rt) {
  g_timer_0 = 1;
  return true; // keep repeating
}

int main() {
    stdio_init_all();

    int timer_0_hz = 5;
    repeating_timer_t timer_0;

    // negative timeout means exact delay (rather than delay between callbacks)
    if (!add_repeating_timer_us(-1000000 / timer_0_hz, timer_0_callback, NULL, &timer_0)) {
        printf("Failed to add timer\n");
        return 1;
    }

   while(1){
      if(g_timer_0){
        printf("Hello timer 0 \n");
        g_timer_0 = 0;
      }

   }
}