#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/pwm.h"
#include "hardware/irq.h"

const uint LED_RED = 13;
const uint LED_GREEN = 11;
const uint LED_BLUE = 12;  

volatile uint led_level = 50;
const uint PERIOD = 1000;   
const float DIVIDER = 125;

bool callback_function(struct repeating_timer *timer) {
    printf("Level %d, Duty Cycle: %.0f%% \n", led_level, (1.0*led_level/PERIOD)*100.0);

    pwm_set_gpio_level(LED_RED, led_level);
    pwm_set_gpio_level(LED_GREEN, led_level);

    led_level += 50;
    if (led_level >= PERIOD) {
        led_level = 50; 
    }
    return true;
}

void configure_pwm_frequency(uint gpio, uint multiplier) {
    gpio_set_function(gpio, GPIO_FUNC_PWM); 
    uint slice = pwm_gpio_to_slice_num(gpio);
    pwm_set_clkdiv(slice, DIVIDER/multiplier); 
    pwm_set_wrap(slice, PERIOD); 
    pwm_set_enabled(slice, true);
}

int main() {
    stdio_init_all();

    uint another_level = 0;

    bool direction = true;

    configure_pwm_frequency(LED_BLUE, 100);  
    configure_pwm_frequency(LED_RED, 1);  
    configure_pwm_frequency(LED_GREEN, 10);

    struct repeating_timer timer;
    add_repeating_timer_ms(2000, callback_function, NULL, &timer);

    while (true) {
          pwm_set_gpio_level(LED_BLUE, another_level);
          if (direction){
           another_level+= 100;
          }else {
            another_level-= 100;
          }
          if (another_level >= PERIOD) {
              direction = false;
          }
          if (another_level <=  1) {
            direction = true;
          }

        sleep_ms(50); 
    }
}