ESP32-C6的LEDC PWM讯号在light sleep时无法持续产生

[George_Chen]

大家好!
我使用IDF里的”ledc_basic” example code，并加入了esp_light_sleep_start()进入light sleep。我有参考一些相关问题的帖子，在进入前有设置了ledc timer clock为LEDC_USE_RC_FAST_CLK；及RC_FAST在sleep mode电源打开；并将ledc的gpio 禁止sleep模式。这样的设定，仍无法在light sleep模式下持续产生LEDC讯号。想请问大家是否能提供一些建议? 謝謝。

IDF version: (master)5.4.0
Development board: ESP32-C6-DevKitM-1
Development Platform: Windows, VS Code

底下是我目前使用的程序:

Code: Select all

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

#define LEDC_TIMER              LEDC_TIMER_0
#define LEDC_MODE               LEDC_LOW_SPEED_MODE
#define LEDC_OUTPUT_IO          (7) // Define the output GPIO
#define LEDC_CHANNEL            LEDC_CHANNEL_0
#define LEDC_DUTY_RES           LEDC_TIMER_10_BIT 
#define LEDC_DUTY               (16) 
#define LEDC_FREQUENCY          (4000) 

static void example_ledc_init(void)
{
    // Prepare and then apply the LEDC PWM timer configuration
    ledc_timer_config_t ledc_timer = {
        .speed_mode       = LEDC_MODE,
        .duty_resolution  = LEDC_DUTY_RES,
        .timer_num        = LEDC_TIMER,
        .freq_hz          = LEDC_FREQUENCY,  
        .clk_cfg          = LEDC_USE_RC_FAST_CLK
    };
    ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));

    // Prepare and then apply the LEDC PWM channel configuration
    ledc_channel_config_t ledc_channel = {
        .speed_mode     = LEDC_MODE,
        .channel        = LEDC_CHANNEL,
        .timer_sel      = LEDC_TIMER,
        .intr_type      = LEDC_INTR_DISABLE,
        .gpio_num       = LEDC_OUTPUT_IO,
        .duty           = 0, 
        .hpoint         = 0
    };
    ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
}

static void ledc_task(void *args)
{
    // Set the LEDC peripheral configuration
    example_ledc_init();
    ESP_ERROR_CHECK(ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, LEDC_DUTY));
    ESP_ERROR_CHECK(ledc_update_duty(LEDC_MODE, LEDC_CHANNEL));

    esp_sleep_pd_config(ESP_PD_DOMAIN_RC_FAST, ESP_PD_OPTION_ON);
    gpio_sleep_sel_dis(LEDC_OUTPUT_IO); 
  
    while(1) 
    {
        printf("Entering light sleep\n");
         /* Enter sleep mode */
        esp_light_sleep_start();
        vTaskDelay(100/portTICK_PERIOD_MS);
    }
}

void app_main(void)
{
    xTaskCreate(ledc_task, "ledc_task", 4096, NULL, 6, NULL);
}

ledc_basic_example_main.c

source_code

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sdkconfig.txt

menuconfig

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