Function esp_idf_sys::pcnt_unit_register_event_callbacks

pub unsafe extern "C" fn pcnt_unit_register_event_callbacks(
    unit: pcnt_unit_handle_t,
    cbs: *const pcnt_event_callbacks_t,
    user_data: *mut c_void,
) -> esp_err_t

@brief Set event callbacks for PCNT unit

@note User registered callbacks are expected to be runnable within ISR context @note The first call to this function needs to be before the call to pcnt_unit_enable @note User can deregister a previously registered callback by calling this function and setting the callback member in the cbs structure to NULL.

@param[in] unit PCNT unit handle created by pcnt_new_unit() @param[in] cbs Group of callback functions @param[in] user_data User data, which will be passed to callback functions directly @return - ESP_OK: Set event callbacks successfully - ESP_ERR_INVALID_ARG: Set event callbacks failed because of invalid argument - ESP_ERR_INVALID_STATE: Set event callbacks failed because the unit is not in init state - ESP_FAIL: Set event callbacks failed because of other error