low_speed_ledc.c

#include <stdio.h>
#include "esp_err.h"
#include "driver/ledc.h"
#include "driver/periph_ctrl.h"


void app_main()
{
    periph_module_enable(PERIPH_LEDC_MODULE);

    int bit_width = 20; // 1 - 20 bits
    int divider = 256;  // Q10.8 fixed point number, 0x100 — 0x3FFFF
    int duty_cycle = 1 << (bit_width - 1);

    float freq_hz = ((uint64_t) LEDC_REF_CLK_HZ << 8) / (float) divider / (1 << bit_width);
    printf("frequency: %f Hz\n", freq_hz);

    ledc_timer_set(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0, divider, bit_width, LEDC_REF_TICK);
    ledc_timer_rst(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0);
    ledc_timer_resume(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0);
    ledc_channel_config_t channel_config = {
        .channel    = LEDC_CHANNEL_0,
        .duty       = duty_cycle,
        .gpio_num   = GPIO_NUM_2,
        .speed_mode = LEDC_HIGH_SPEED_MODE,
        .timer_sel  = LEDC_TIMER_0
    };

    ledc_channel_config(&channel_config);
}

The above code is not working.
In the code ledc_timer_set(LEDC_HIGH_SPEED_MODE, LEDC_TIMER_0, divider, bit_width, LEDC_REF_TICK); is not able to configure LEDC_TIMER_0.
ledc_timer_config_t since it is not used the timer is not configured.
if I put ledc_get_freq it is returning 250hz always.
what can be the issue please help.
I want to generate PWM at 0.5hz

This program is not working for any frequency since the time is not set.
I tried to check it on the oscilloscope but nothing at the output.