dac_drv.h

MP3播放器详细设计方案

/*H**************************************************************************
* $RCSfile: dac_drv.h,v $         
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      $Name: DEMO_FAT_1_9_9 $      
* REVISION:     $Revision: 1.4 $     
* FILE_CVSID:   $Id: dac_drv.h,v 1.4 2002/08/30 12:16:17 njourdan Exp $       
*----------------------------------------------------------------------------
* 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 "..\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
//#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_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_ */