pub unsafe extern "C" fn esp_wifi_set_csi_rx_cb(
    cb: Option<unsafe extern "C" fn(_: *mut c_void, _: *mut wifi_csi_info_t)>,
    ctx: *mut c_void,
) -> i32Expand description
@brief Register the RX callback function of CSI data.
   Each time a CSI data is received, the callback function will be called.@param cb callback @param ctx context argument, passed to callback function
@return
- ESP_OK: succeed
 - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init