enum
{
HAL_USART_STATE_RESET = 0x00U,
HAL_USART_STATE_READY = 0x01U,
HAL_USART_STATE_BUSY = 0x02U,
HAL_USART_STATE_BUSY_TX = 0x12U,
HAL_USART_STATE_BUSY_RX = 0x22U,
HAL_USART_STATE_BUSY_TX_RX = 0x32U,
HAL_USART_STATE_TIMEOUT = 0x03U,
HAL_USART_STATE_ERROR = 0x04U
};