esp32_function_generator.ino

#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/ledc.h"

void setup()
{
    ledc_timer_config_t ledc_timer;
    memset(&ledc_timer, 0, sizeof(ledc_timer_config_t));
    ledc_timer.duty_resolution = LEDC_TIMER_8_BIT; // resolution of PWM duty
    ledc_timer.freq_hz = 500;                      // frequency of PWM signal
    ledc_timer.speed_mode = LEDC_LOW_SPEED_MODE;           // timer mode
    ledc_timer.timer_num = LEDC_TIMER_0;           // timer index
    
    ledc_timer_config(&ledc_timer);

    ledc_channel_config_t channel_config;
    memset(&channel_config, 0, sizeof(ledc_channel_config_t));
    channel_config.channel    = LEDC_CHANNEL_0;
    channel_config.duty       = 127;
    channel_config.gpio_num   = GPIO_NUM_16;
    channel_config.speed_mode = LEDC_LOW_SPEED_MODE;
    channel_config.timer_sel  = LEDC_TIMER_0;
    channel_config.intr_type = LEDC_INTR_DISABLE;

    ledc_channel_config(&channel_config);

    printf("Freq: %u\n", ledc_get_freq(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0));
}

void loop() {
  
}