codec.h

dsp6416开发的底层驱动

/*H***************************************************************************
*
* $Archive::                                                                $
* $Revision::                                                               $
* $Date::                                                                   $
* $Author::                                                                 $
*
* DESCRIPTION:
*
* USAGE/LIMITATIONS:
*
* NOTES:  Supports the Burr-Brown PCM3002 Stero Audio Codec using a McBSP
*         and CPLD.  The CPLD handles all mode transactions and supplies
*         the BCKIN and LRCIN.  The McBSP supplies audio data using the
*         BCKIN as CLKR/CLKX and LRCIN as FSR/FSX.  McBSP should be 
*         configured as follows:
*             32 Bit Data 
*                  16 MSB==0,    16 LSB==Data  DX
*                  16 MSB==Data, 16 LSB==X     DR
*             MSB first
*             FSX/FSR active low
*             CLKXP falling
*             CLKRP rising
*
*         The CPLD creates a LRCIN with a 32 BCKIN high time and 32
*         BCKIN low time.  The PCM3002 captures the last N data bits
*         prior to a LRCIN edge transition.  The PCM3002 sends
*         N data bits following a LRCIN edge transition.
*
*H***************************************************************************/

#ifndef codec_h
#define codec_h

/*---- compilation control switches ----------------------------------------*/

/*****************************************************************************
* INCLUDE FILES (minimize nesting of header files)
*****************************************************************************/

/*---- system and platform files -------------------------------------------*/

/*---- program files -------------------------------------------------------*/

/*****************************************************************************
* FILE CONTENT
*****************************************************************************/

/*****************************************************************************
* FUNCTIONAL AREA DETAIL
*****************************************************************************/

/*---- context -------------------------------------------------------------*/
#define  MODE_REG0   0
#define  MODE_REG1   1
#define  MODE_REG2   2
#define  MODE_REG3   3

#define  MR0_LDL           0x0100
#define  MR0_AL            0x00FF
#define  MR0_DEFAULT       0x00FF

#define  MR1_LDR           0x0100
#define  MR1_AR            0x00FF
#define  MR1_DEFAULT       0x00FF

#define  MR2_PDAD          0x0100
#define  MR2_BYPS          0x0080
#define  MR2_PDDA          0x0040
#define  MR2_ATC           0x0020
#define  MR2_IZD           0x0010
#define  MR2_OUT           0x0008
#define  MR2_DEM_44KH_ON   0x0000
#define  MR2_DEM_OFF       0x0002
#define  MR2_DEM_48KHZ_ON  0x0004
#define  MR2_DEM_32KHZ_ON  0x0006
#define  MR2_MUT           0x0001
#define  MR2_DEFAULT       MR2_DEM_OFF


#define  MR3_LOP           0x0020
#define  MR3_FMT_16B_R     0x0000 
#define  MR3_FMT_20B_R     0x0004 
#define  MR3_FMT_20B_L     0x0008 
#define  MR3_FMT_20B_I2S   0x000C 
#define  MR3_LRP           0x0002
#define  MR3_DEFAULT       0x0000

#define  LEFT_CHANNEL      1         // Left channel only
#define  RIGHT_CHANNEL     2         // Right channel only
#define  BOTH_CHANNEL      3         // Both left and right channel

/*---- data descriptions ---------------------------------------------------*/

typedef struct _codec_config 
{
	int ModeReg0;
	int ModeReg1;
	int ModeReg2;
	int ModeReg3;
}CODEC_CONFIG;

typedef struct _audio_sample
{
	int  LChOut;
	int  RChOut;
	int  LChIn;
	int  RChIn;
}AUDIO_SAMPLE;

/*---- global function prototypes ------------------------------------------*/
#ifdef GLOBAL
    #undef GLOBAL
#endif
#ifdef codec_c
   #define GLOBAL 
#else
   #define GLOBAL extern
#endif

GLOBAL int     CODEC_SetConfiguration( CODEC_CONFIG *pCodeConfig );
GLOBAL int     CODEC_WriteMode(  int ModeReg, int ModeVal );
GLOBAL int     CODEC_AudioSample( AUDIO_SAMPLE * pAudioSample );
GLOBAL void    CODEC_PlayTone( int Number, int TonePlayBk, int LR_Channel );

#endif /* cpld_h  --------- END OF FILE ------------------------------------*/