| // Copyright lowRISC contributors. |
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| // SPDX-License-Identifier: Apache-2.0 |
| |
| use anyhow::Result; |
| use std::io::{Read, Write}; |
| use std::time::Duration; |
| |
| /// A trait which represents a UART. |
| pub trait Uart: Read + Write { |
| /// Returns the UART baudrate. May return zero for virtual UARTs. |
| fn get_baudrate(&self) -> u32; |
| |
| /// Sets the UART baudrate. May do nothing for virtual UARTs. |
| fn set_baudrate(&mut self, baudrate: u32) -> Result<()>; |
| |
| /// Reads UART recieve data into `buf`, returning the number of bytes read. |
| /// The `timeout` may be used to specify a duration to wait for data. |
| fn read_timeout(&mut self, buf: &mut [u8], timeout: Duration) -> Result<usize>; |
| } |
