Function esp_idf_svc::sys::ledc_update_duty

pub unsafe extern "C" fn ledc_update_duty(
    speed_mode: u32,
    channel: u32,
) -> i32

@brief LEDC update channel parameters

@note Call this function to activate the LEDC updated parameters. After ledc_set_duty, we need to call this function to update the settings. And the new LEDC parameters don’t take effect until the next PWM cycle. @note ledc_set_duty, ledc_set_duty_with_hpoint and ledc_update_duty are not thread-safe, do not call these functions to control one LEDC channel in different tasks at the same time. A thread-safe version of API is ledc_set_duty_and_update @note If CONFIG_LEDC_CTRL_FUNC_IN_IRAM is enabled, this function will be placed in the IRAM by linker, makes it possible to execute even when the Cache is disabled. @note This function is allowed to run within ISR context.

@param speed_mode Select the LEDC channel group with specified speed mode. Note that not all targets support high speed mode. @param channel LEDC channel (0 - LEDC_CHANNEL_MAX-1), select from ledc_channel_t

@return - ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error