__HAL_UART_ENABLE_IT macro

specifies the UART Handle. UART Handle selects the USARTx or UARTy peripheral (USART,UART availability and x,y values depending on device).

specifies the UART interrupt source to enable. This parameter can be one of the following values: @arg UART_IT_CTS: CTS change interrupt @arg UART_IT_LBD: LIN Break detection interrupt @arg UART_IT_TXE: Transmit Data Register empty interrupt @arg UART_IT_TC: Transmission complete interrupt @arg UART_IT_RXNE: Receive Data register not empty interrupt @arg UART_IT_IDLE: Idle line detection interrupt @arg UART_IT_PE: Parity Error interrupt @arg UART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)