sys7.1-doc-wip/OS/VDig/I2C.h
2019-07-27 22:37:48 +08:00

77 lines
2.0 KiB
C

/*
File: I2C.h
Contains: Header file for I2C component routines.
Written by: Gary Woodcock
Copyright: © 1992 by Apple Computer, Inc., all rights reserved.
Change History (most recent first):
<SM3> 12/9/92 DH Changed file creator to 'MPS '
<SM2> 12/9/92 DH Changed to using QTComponents.h because it was causing file not
founds because path name were too long.
*/
//-----------------------------------------------------------------------
// Includes
#ifndef _I2C_
#define _I2C_
#include <QTComponents.h>
//-----------------------------------------------------------------------
// Constants
// I2C component type
#define i2cComponentType 'i2c '
// I2C component interface version
enum
{
i2cComponentInterfaceVersion = 0x0002
};
// I2C component selectors
enum
{
kI2CReadSelect = 1,
kI2CWriteSelect,
kI2CReadWithSubAddrSelect,
kI2CWriteWithSubAddrSelect
};
//-----------------------------------------------------------------------
// Types
typedef ComponentInstance I2CComponent;
//-----------------------------------------------------------------------
// Prototypes
pascal ComponentResult
I2CRead (I2CComponent i2cInstance, unsigned short slaveAddr, short byteCount, void *dataBuf)
= ComponentCallNow (kI2CReadSelect, 0x08);
pascal ComponentResult
I2CWrite (I2CComponent i2cInstance, unsigned short slaveAddr, short byteCount, void *dataBuf)
= ComponentCallNow (kI2CWriteSelect, 0x08);
pascal ComponentResult
I2CReadWithSubAddr (I2CComponent i2cInstance, unsigned short slaveAddr,
unsigned short subAddr, short byteCount, void *dataBuf)
= ComponentCallNow (kI2CReadWithSubAddrSelect, 0x0A);
pascal ComponentResult
I2CWriteWithSubAddr (I2CComponent i2cInstance, unsigned short slaveAddr,
unsigned short subAddr, short byteCount, void *dataBuf)
= ComponentCallNow (kI2CWriteWithSubAddrSelect, 0x0A);
//-----------------------------------------------------------------------
#endif _I2C_
//-----------------------------------------------------------------------