vlab.h

视频601芯片的驱动源码,你可以完全掌控该芯片了,对于其它多媒体芯片的设计具有参考价值

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

$Workfile: VLAB.H $
$Date: 6/19/97 6:39p $
$Revision: 1 $
* Purpose:	
*
* Notes:       
*
$History: VLAB.H $
 * 
 * *****************  Version 1  *****************
 * User: Stevel       Date: 6/19/97    Time: 6:39p
 * Created in $/601cman
 * Move Videolab card control register bit definition from i2c,h to here.

  
    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.
  
    1997 Analog Devices, Inc. 
  
-------------------------------------------------------------------------*/

/*  22v10 PAL Main Ctl & Stat register Bit definitions
    Note.  These bits are NOT read/write.  Writing  bits
    switches things on and off.  Reading bits returns status
    of various other things. Read DOES NOT return the last value written.
    Read modify write operations are not meaningful on this register.
*/

/*      Write only bit  */
#define     DMA_ENABLE      0x8000      /* Dma is on,601 registers disappear*/
/*      Read only bits  */
#define     VREF_7111       0x8000      /* If read, bit is the 7111 VREF pin */
#define     FIFO_SRQ        0x4000      /* ADV601 fifo_srq pin */
#define     ODD_FIELD_7111  0x2000      /* Odd field pin from 7111 */
/*      Write only bits */
#define 	SYSTEM_RESET 	0x1000      /* Obsolete name for ENABLE_601CHIP */
#define     ENABLE_601CHIP  0x1000      /* Current Name.  1 makes
                                        /* system run, 0 resets it */
#define		SCL_OE			0x0800      /* I2c bus clock line output enable*/
#define		SCL 			0x0400      /* I2c bus clock line   */ 

#define		SDA_OE			0x0200      /* i2c bus data line output enable */
/*  read/write bit.  Write it to transmit data out the I2C bus.  Take away
    SDA_OE and read it to receive data back from I2c bus slaves.     */
#define		SDA 			0x0100      /* i2c bus data line */