i2c.h

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/*------------------------------------------------------------------------

$Workfile: I2C.H $
$Date: 6/20/97 3:48p $
$Revision: 6 $
* Purpose:	
*			Header for I2C support routines.			
* Notes:       
*			This header also define bit definitions for I2C bus control
*			register on ADV601 evaluation board.
*
$History: I2C.H $
 * 
 * *****************  Version 6  *****************
 * User: Stevel       Date: 6/20/97    Time: 3:48p
 * Updated in $/601cman
 * remove some of the Video Lab Card Control register bit definition to
 * vlab.h.
 * 
 * *****************  Version 5  *****************
 * User: Dstarr       Date: 5/29/96    Time: 8:35a
 * Updated in $/601cman
 * Add #define DMA_ENABLE bit to the 22v10 Pal control register.  Improve
 * comments on other bit names.
 * 
 * *****************  Version 4  *****************
 * User: Dstarr       Date: 4/09/96    Time: 9:42a
 * Updated in $/601cman
 * Catch 32 fix.  See lengthy comment in i2c.c  Callers of set & clr mcsr
 * bit should be recompiled.
 * 
 * 
 * *****************  Version 3  *****************
 * User: Dstarr       Date: 4/03/96    Time: 11:57a
 * Updated in $/601cman
 * clr and set mcscr bit now return the bit pattern they wrote to the main
 * cmd & status register.  This is of interest to 601test, but probably no
 * one else.
 * 
 * *****************  Version 2  *****************
 * User: Stevel       Date: 3/10/96    Time: 10:14p
 * Updated in $/601cman
 * Add DLLEXPORT keyword to export functions for diagnostic test.
 * 
 * *****************  Version 1  *****************
 * User: Stevel       Date: 3/06/96    Time: 7:55p
 * Created in $/601cman
 * Initial release

  
    This code and information is provided "as is" without warranty of any
    kind, either expressed or implied, including but not limited to the
    implied warranties of merchantability and/or fitness for a particular
    purpose.
  
    1996 Analog Devices, Inc. 
  
-------------------------------------------------------------------------*/

/*  I2c error code symbolic names */

#define I2C_BAD_ADDR_WR     2
#define I2C_BAD_ACK         4
#define I2C_BAD_DATA_WR     8
#define I2C_BAD_CHIPID      0x10
#define I2C_BAD_DATA_RD     0x20
#define I2C_STUCK_CLK       0x40



#define DLLEXPORT __declspec(dllexport)

//=================================================================
// I2C Function prototypes
//=================================================================
DLLEXPORT 	int I2CInit(dword * ptr);
DLLEXPORT 	void Delay(int);
DLLEXPORT 	int I2CStart(void);
DLLEXPORT 	int I2CStop(void);
DLLEXPORT 	int  I2CWriteAck(void);
DLLEXPORT 	int I2CReadAck(void);
DLLEXPORT 	int I2CBitWrite(byte);
DLLEXPORT 	byte I2CBitRead(void);
DLLEXPORT 	int I2CWriteAddr(byte);
DLLEXPORT 	int  I2CWriteData(byte);
DLLEXPORT 	byte I2CReadData(void);
DLLEXPORT 	dword ClockCycleCalibrate();
DLLEXPORT 	int rite_i2c_chip(void * ptr, int subaddr,int nreg );
DLLEXPORT 	int readhard_i2c_chip(void * hisptr, int subaddr,int nreg );
DLLEXPORT 	int read_i2c_chip(void * ptr, int subaddr,int nreg );

DLLEXPORT 	word set_mcsrbit (word);
DLLEXPORT 	word clr_mcsrbit (word);