Function esp_idf_sys::uart_set_loop_back

pub unsafe extern "C" fn uart_set_loop_back(
    uart_num: uart_port_t,
    loop_back_en: bool,
) -> esp_err_t

@brief Configure TX signal loop back to RX module, just for the test usage.

@param uart_num UART number @param loop_back_en Set ture to enable the loop back function, else set it false.

• @return
  • ESP_OK on success
  • ESP_ERR_INVALID_ARG Parameter error
  • ESP_FAIL Driver not installed