laserpong/main/laserpong_main.c

/* Hello World Example

   This example code is in the Public Domain (or CC0 licensed, at your option.)

   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "driver/ledc.h"

void app_main()
{
    printf("Hello world!\n");

    ledc_timer_config_t timer_conf;
    timer_conf.duty_resolution = LEDC_TIMER_15_BIT;
    timer_conf.freq_hz = 50;
    timer_conf.speed_mode = LEDC_HIGH_SPEED_MODE;
    timer_conf.timer_num = LEDC_TIMER_0;
    ledc_timer_config(&timer_conf);

    ledc_channel_config_t ledc_conf;
    ledc_conf.channel = LEDC_CHANNEL_0;
    ledc_conf.duty = 3276; //800; //3276; //1638; // to 3276
    ledc_conf.gpio_num = 15;
    ledc_conf.intr_type = LEDC_INTR_DISABLE;
    ledc_conf.speed_mode = LEDC_HIGH_SPEED_MODE;
    ledc_conf.timer_sel = LEDC_TIMER_0;
    ledc_channel_config(&ledc_conf);

    /* Print chip information */
    esp_chip_info_t chip_info;
    esp_chip_info(&chip_info);
    printf("This is ESP32 chip with %d CPU cores, WiFi%s%s, ",
            chip_info.cores,
            (chip_info.features & CHIP_FEATURE_BT) ? "/BT" : "",
            (chip_info.features & CHIP_FEATURE_BLE) ? "/BLE" : "");

    printf("silicon revision %d, ", chip_info.revision);

    printf("%dMB %s flash\n", spi_flash_get_chip_size() / (1024 * 1024),
            (chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded" : "external");

    for (int i = 10; i >= 0; i--) {
        printf("Restarting in %d seconds...\n", i);
        vTaskDelay(1000 / portTICK_PERIOD_MS);
        if(ledc_conf.duty > 1000) {
            ledc_conf.duty = 800;
        } else {
            ledc_conf.duty = 3276;
        }
        ledc_channel_config(&ledc_conf);
    }
    printf("Restarting now.\n");
    fflush(stdout);
    esp_restart();
}