#include "pico/stdlib.h"
#include "hardware/pwm.h"
#include "hardware/adc.h"

int main() {

    adc_init();
    adc_gpio_init(26);
    adc_select_input(0);

    gpio_set_function(15, GPIO_FUNC_PWM);

    uint slice = pwm_gpio_to_slice_num(15);

    pwm_set_clkdiv(slice, 125.0f); // Takt durch 125 teilen
    pwm_set_wrap(slice, 19999); // 50Hz Frequenz 0-19999 20000 schritte 20ms
    pwm_set_enabled(slice, true); //pwm starten

    while (true) {

        uint16_t value = adc_read(); // ADC Wert lesen

        uint16_t brightness = value * 20000UL / 4095; //Helligkeit berechnen

        pwm_set_chan_level(slice, PWM_CHAN_B, brightness); //LED Helligkeit einstellen

        sleep_ms(1000);

        pwm_set_chan_level(slice, PWM_CHAN_B, 0);

        sleep_ms(1000);
    }
}