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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/SerialPortLibNull/SerialPortLibNull.c
2 Null Serial Port library instance with empty functions.
4 Copyright (c) 2006 - 2008, Intel Corporation
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 #include <Library/SerialPortLib.h>
22 Programmed hardware of Serial port.
24 @return Always return RETURN_UNSUPPORTED.
29 SerialPortInitialize (
33 return RETURN_UNSUPPORTED
;
37 Write data to serial device.
39 @param Buffer Point of data buffer which need to be writed.
40 @param NumberOfBytes Number of output bytes which are cached in Buffer.
42 @retval 0 No data is to be written.
49 IN UINTN NumberOfBytes
57 Read data from serial device and save the datas in buffer.
59 @param Buffer Point of data buffer, which contains the data
60 returned from the serial device.
61 @param NumberOfBytes Number of bytes which will be read.
63 @retval 0 No data is to be read.
70 IN UINTN NumberOfBytes
77 Poll the serial device to see if there is any data waiting.
79 If there is data waiting to be read from the serial port, then return
80 TRUE. If there is no data waiting to be read from the serial port, then
83 @retval FALSE There is no data waiting to be read.