mirror of https://github.com/acidanthera/audk.git
65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
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/** @file
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Interface Definitions for I2C Lib.
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Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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--*/
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#include <Uefi.h>
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#include <Library/IoLib.h>
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#ifndef I2C_LIB_HEADER_H
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#define I2C_LIB_HEADER_H
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/**
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Reads a Byte from I2C Device.
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@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
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@param SlaveAddress Device Address from which the byte value has to be read
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@param Offset Offset from which the data has to be read
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@param ReadBytes Number of bytes to be read
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@param *ReadBuffer Address to which the value read has to be stored
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@return EFI_SUCCESS If the byte value has been successfully read
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@return EFI_DEVICE_ERROR Operation Failed, Device Error
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**/
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EFI_STATUS
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ByteReadI2C(
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IN UINT8 BusNo,
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IN UINT8 SlaveAddress,
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IN UINT8 Offset,
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IN UINTN ReadBytes,
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OUT UINT8 *ReadBuffer
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);
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/**
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Writes a Byte to I2C Device.
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@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
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@param SlaveAddress Device Address from which the byte value has to be written
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@param Offset Offset from which the data has to be written
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@param WriteBytes Number of bytes to be written
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@param *Byte Address to which the value written is stored
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@return EFI_SUCCESS If the byte value has been successfully read
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@return EFI_DEVICE_ERROR Operation Failed, Device Error
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**/
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EFI_STATUS ByteWriteI2C(
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IN UINT8 BusNo,
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IN UINT8 SlaveAddress,
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IN UINT8 Offset,
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IN UINTN WriteBytes,
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IN UINT8 *WriteBuffer
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);
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#endif
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