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

@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