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75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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/*
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File: I2C.h
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Contains: Header file for I2C component routines.
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Written by: Gary Woodcock
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Copyright: © 1992 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<1> 10/29/92 DH first checked in
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*/
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//-----------------------------------------------------------------------
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// Includes
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#ifndef _I2C_
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#define _I2C_
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#include <QuickTimeComponents.h>
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//-----------------------------------------------------------------------
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// Constants
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// I2C component type
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#define i2cComponentType 'i2c '
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// I2C component interface version
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enum
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{
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i2cComponentInterfaceVersion = 0x0002
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};
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// I2C component selectors
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enum
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{
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kI2CReadSelect = 1,
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kI2CWriteSelect,
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kI2CReadWithSubAddrSelect,
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kI2CWriteWithSubAddrSelect
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};
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//-----------------------------------------------------------------------
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// Types
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typedef ComponentInstance I2CComponent;
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//-----------------------------------------------------------------------
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// Prototypes
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pascal ComponentResult
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I2CRead (I2CComponent i2cInstance, unsigned short slaveAddr, short byteCount, void *dataBuf)
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= ComponentCallNow (kI2CReadSelect, 0x08);
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pascal ComponentResult
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I2CWrite (I2CComponent i2cInstance, unsigned short slaveAddr, short byteCount, void *dataBuf)
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= ComponentCallNow (kI2CWriteSelect, 0x08);
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pascal ComponentResult
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I2CReadWithSubAddr (I2CComponent i2cInstance, unsigned short slaveAddr,
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unsigned short subAddr, short byteCount, void *dataBuf)
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= ComponentCallNow (kI2CReadWithSubAddrSelect, 0x0A);
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pascal ComponentResult
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I2CWriteWithSubAddr (I2CComponent i2cInstance, unsigned short slaveAddr,
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unsigned short subAddr, short byteCount, void *dataBuf)
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= ComponentCallNow (kI2CWriteWithSubAddrSelect, 0x0A);
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//-----------------------------------------------------------------------
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#endif _I2C_
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//-----------------------------------------------------------------------
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