How to use the log serial port as a regular serial port on BK 7231N?

INT_Tresult=OPRT_OK;
TAL_UART_CFG_Tcfg= {0};
cfg.base_cfg.baudrate=115200;
cfg.base_cfg.databits=TUYA_UART_DATA_LEN_8BIT;
cfg.base_cfg.stopbits=TUYA_UART_STOP_LEN_1BIT;
cfg.base_cfg.parity=TUYA_UART_PARITY_TYPE_NONE;
cfg.rx_buffer_size=256;
cfg.open_mode=O_BLOCK;
tal_uart_deinit(TUYA_UART_NUM_1);
result=tal_uart_init(TUYA_UART_NUM_1,&cfg);//usrt 1 init  
if (OPRT_OK!=result) {
  TAL_PR_ERR("uart1 init failed", result);
 }