dac_drv.h

ATMEL公司AT89C51SND1为主控制器MP3源代码

/*H**************************************************************************
* NAME:         dac_drv.h         
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-refd-nf-4_0_3      
* REVISION:     1.7     
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the audio dac driver definitions
*****************************************************************************/

#ifndef _DAC_DRV_H_
#define _DAC_DRV_H_

/*_____ I N C L U D E S ____________________________________________________*/

#include "config.h"                         /* system definition */
#include "board.h"                          /* board definition */

 
/*_____ M A C R O S ________________________________________________________*/


/*_____ D E F I N I T I O N ________________________________________________*/

/*_____ D E C L A R A T I O N ______________________________________________*/
#ifdef DAC_L3MODE
extern Byte    mp3_volume;

//#define Dac_emphasis(b)       ((b == TRUE)? (DAC_DEEM = ON) : (DAC_DEEM = OFF))
#define dac_init()          dac_l3mode_send(DAC_L3I_ADDR,193);
#define Dac_mute()          dac_l3mode_send(DAC_L3I_ADDR,132);
#define Dac_unmute()        { dac_set_vol(mp3_volume); dac_l3mode_send(DAC_L3I_ADDR,128); }
#define Dac_overclock(b)    dac_l3mode_send(DAC_L3I_ADDR+2,b?16+6:32+6);

void dac_set_vol        (Byte volume);
void dac_l3mode_send    (Byte addr,Byte b);

#else // DAC_L3MODE
#define Dac_emphasis(b)       ((b == TRUE)? (DAC_DEEM = ON) : (DAC_DEEM = OFF))
#define Dac_mute()            (DAC_MUTE=ON);
#define Dac_unmute()          (DAC_MUTE=OFF);
#ifdef DAC_CLK
#define Dac_overclock(b)      (DAC_CLK= b);
#else
#ifdef DAC_INVCLK
#define Dac_overclock(b)      (DAC_INVCLK= ~b);
#endif
#endif
#define Dac_set_SF0()         (DAC_SF0= ON);
#define Dac_set_SF1()         (DAC_SF1= ON);
#define Dac_clr_SF0()         (DAC_SF0= OFF);
#define Dac_clr_SF1()         (DAC_SF1= OFF);
#define dac_init()            ;
#define dac_set_vol(b)        MP3VOL = MP3VOR = b
#endif

#endif  /* _DAC_DRV_H_ */