/*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#endifGLOBAL 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 ------------------------------------*/