mirror of https://github.com/acidanthera/audk.git
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/** @file
|
|
Interface Definitions for I2C Lib.
|
|
|
|
Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
--*/
|
|
|
|
#include <Uefi.h>
|
|
#include <Library/IoLib.h>
|
|
|
|
#ifndef I2C_LIB_HEADER_H
|
|
#define I2C_LIB_HEADER_H
|
|
|
|
|
|
/**
|
|
Reads a Byte from I2C Device.
|
|
|
|
@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
|
|
@param SlaveAddress Device Address from which the byte value has to be read
|
|
@param Offset Offset from which the data has to be read
|
|
@param ReadBytes Number of bytes to be read
|
|
@param *ReadBuffer Address to which the value read has to be stored
|
|
|
|
@return EFI_SUCCESS If the byte value has been successfully read
|
|
@return EFI_DEVICE_ERROR Operation Failed, Device Error
|
|
**/
|
|
EFI_STATUS
|
|
ByteReadI2C(
|
|
IN UINT8 BusNo,
|
|
IN UINT8 SlaveAddress,
|
|
IN UINT8 Offset,
|
|
IN UINTN ReadBytes,
|
|
OUT UINT8 *ReadBuffer
|
|
);
|
|
|
|
/**
|
|
Writes a Byte to I2C Device.
|
|
|
|
@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
|
|
@param SlaveAddress Device Address from which the byte value has to be written
|
|
@param Offset Offset from which the data has to be written
|
|
@param WriteBytes Number of bytes to be written
|
|
@param *Byte Address to which the value written is stored
|
|
|
|
@return EFI_SUCCESS If the byte value has been successfully read
|
|
@return EFI_DEVICE_ERROR Operation Failed, Device Error
|
|
**/
|
|
EFI_STATUS ByteWriteI2C(
|
|
IN UINT8 BusNo,
|
|
IN UINT8 SlaveAddress,
|
|
IN UINT8 Offset,
|
|
IN UINTN WriteBytes,
|
|
IN UINT8 *WriteBuffer
|
|
);
|
|
|
|
#endif
|