vs1001.h

butterfly MP3源代码

/*
  Copyright (C) 2000 Jesper Hansen <[e-mail]>.

  This file is part of the yampp system.

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2
  of the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation, 
  Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/


/* 
 * Modified for ButerflyMP3 13/07/2004	
 */

#define DREQ_DDR	DDRE
#define BSYNC_DDR	DDRE    
#define MP3_DDR		DDRB
#define RESET_DDR	DDRB

#define DREQ_PORT	PINE
#define BSYNC_PORT	PORTE    
#define MP3_PORT	PORTB
#define RESET_PORT	PORTB

#define DREQ_PIN	PE6				// DREQ signal
#define	BSYNC_PIN	PE5				// BSYNC signal
#define MP3_PIN		PB0				// MP3 control bit
#define RESET_PIN	PB5				// -RESET signal

// defines for Mode control of vs1001k

#define SM_DIFF 	1
#define SM_FFWD 	2
#define SM_RESET 	4
#define SM_MP12 	8
#define SM_PDOWN 	16
#define SM_DAC 		32
#define SM_DACMONO 	64
#define SM_BASS 	128
#define SM_DACT 	256
#define SM_IBMODE	512
#define SM_IBCLK	1024

// defines for SCI registers

#define SCI_MODE		0
#define SCI_STATUS		1
#define SCI_INT_FCTLH	2
#define SCI_CLOCKF		3
#define SCI_DECODE_TIME 4
#define SCI_AUDATA		5
#define SCI_WRAM		6
#define SCI_WRAMADDR	7
#define SCI_HDAT0		8
#define SCI_HDAT1		9
#define SCI_AIADDR		10
#define SCI_VOL			11

typedef enum {
	SOFT_RESET,
	HARD_RESET
} reset_e;



// setup I/O pins and directions for
// communicating with the VS1001
void vs1001_init_io(void);

// setup the VS1001 chip for decoding
void vs1001_init_chip(void);

// reset the VS1001
void vs1001_reset(reset_e r);

// send a number of zero's to the VS1001
void vs1001_nulls(unsigned int nNulls);

void vs1001_read(uint8 address, uint16 count, uint16 *pData);

//
// write one or more word(s) to the VS1001 Control registers
//
void vs1001_write(uint8 address, uint16 count, uint16 *pData);

void vs_1001_setvolume(unsigned char left, unsigned char right);

// send MP3 data
inline void vs1001_send_data(unsigned char b);
inline void vs1001_send_32(unsigned char *p);