esp32_ledc_loop.c

// 逐一値実行版
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/ledc.h"
#include "sdkconfig.h"

void app_main(void) {
	ledc_timer_config_t tconfig = {
		.speed_mode = LEDC_HIGH_SPEED_MODE,
		.duty_resolution = LEDC_TIMER_10_BIT,
		.timer_num = LEDC_TIMER_0,
		.freq_hz = 1000,
		.clk_cfg = LEDC_AUTO_CLK
	};
	ledc_timer_config(&tconfig);
	ledc_channel_config_t cconfig = {
		.gpio_num = 2,
		.speed_mode = LEDC_HIGH_SPEED_MODE,
		.channel = LEDC_CHANNEL_0,
		.intr_type = LEDC_INTR_DISABLE,
		.timer_sel = LEDC_TIMER_0,
		.duty = 1024,
		.hpoint = 0
	};
	ledc_channel_config(&cconfig);

	uint32_t duty = 1024;
	while(1) {
		vTaskDelay(20 / portTICK_PERIOD_MS);
		duty -= 16;
		if( duty == 0 ) duty = 1024;
		ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0, duty);
		ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0);
	}
}