Function esp_idf_sys::ledc_set_freq

pub unsafe extern "C" fn ledc_set_freq(
    speed_mode: ledc_mode_t, 
    timer_num: ledc_timer_t, 
    freq_hz: u32
) -> esp_err_t

@brief LEDC set channel frequency (Hz)

@param speed_mode Select the LEDC speed_mode, high-speed mode and low-speed mode @param timer_num LEDC timer index (0-3), select from ledc_timer_t @param freq_hz Set the LEDC frequency

@return - ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error - ESP_FAIL Can not find a proper pre-divider number base on the given frequency and the current duty_resolution.