MP3播放器详细设计方案
源代码在线查看： df.h
/*H**************************************************************************
* $RCSfile: df.h,v $
*----------------------------------------------------------------------------
* Copyright (c) 2002 Atmel.
*----------------------------------------------------------------------------
* RELEASE: $Name: DEMO_FAT_1_9_9 $
* REVISION: $Revision: 1.8 $
* FILE_CVSID: $Id: df.h,v 1.8 2002/08/14 07:41:39 ffosse Exp $
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the dataflash definition
*****************************************************************************/
#ifndef _DF_H_
#define _DF_H_
/*_____ I N C L U D E S ____________________________________________________*/
#include "..\..\lib_demob\board.h" /* board definition */
/*_____ M A C R O S ________________________________________________________*/
/*----- DataFlash definition -----*/
#define DF_MSK_DENSITY ((Byte)0xB8) /* status density mask */
#define DF_MSK_BIT_BUSY ((Byte)0x80)
#define DF_MEM_BUSY ((Byte)0x00)
#define DF_RD_STATUS ((Byte)0x57) /* read status */
#define DF_PG_ERASE ((Byte)0x81) /* page erase */
#define DF_BK_ERASE ((Byte)0x50) /* block erase */
#define DF_WR_BUF_1 ((Byte)0x84) /* write buffer 1 */
#define DF_WR_BUF_2 ((Byte)0x87) /* write buffer 2 */
#define DF_B1_MAIN ((Byte)0x83) /* buffer 1 to main program with erase */
#define DF_B2_MAIN ((Byte)0x86) /* buffer 2 to main program with erase */
#define DF_RD_MAIN ((Byte)0x52) /* read main memory */
#define DF_TF_BUF_1 ((Byte)0x53) /* main memory page to buffer 1 transfer */
#define DF_TF_BUF_2 ((Byte)0x55) /* main memory page to buffer 2 transfer */
#define DF_RD_BUF_1 ((Byte)0x54) /* read buffer 1 */
#define DF_RD_BUF_2 ((Byte)0x56) /* read buffer 2 */
#ifdef DF_4_MB /* AT45DB321 memories */
#define DF_DENSITY ((Byte)0xB0)
#define DF_PG_BUF_1 ((Byte)0x82) /* main memory program through buf1 */
#define DF_PG_BUF_2 ((Byte)0x85) /* main memory program through buf2 */
#define DF_MEM_SIZE ((Uint32)0x400000)
#define DF_NB_BLOCK ((Uint16)1024) /* block number */
#define DF_BLOCK_SIZE ((Byte)8) /* block length (in page) */
#define DF_PAGE_SIZE (512) /* page length */
#define DF_PAGE_MASK ((Byte)0x01) /* mask MSB page bits */
#define DF_MEM_MASKH ((Byte)0x80)
#define DF_MEM_MASKL ((Byte)0x40)
#define DF_MEM_BYTEH ((Byte)1)
#define DF_MEM_BYTEL ((Byte)1)
#define DF_SHFT_B1 (1)
#define DF_SHFT_B2 (7)
#define DF_NB_CYLINDER ((Uint16)511)
#define DF_NB_HEAD ((Byte)4)
#define DF_NB_SECTOR ((Byte)16)
#define DF_DISK_SIZE (Uint32)(32767)
#endif
#ifdef DF_8_MB /* AT45DB642 memories */
#define DF_DENSITY ((Byte)0xB8)
#define DF_PG_BUF_1 ((Byte)0x92) /* fast main memory program through buf1 */
#define DF_PG_BUF_2 ((Byte)0x95) /* fast main memory program through buf2 */
#define DF_MEM_SIZE ((Uint32)0x800000)
#define DF_NB_BLOCK ((Uint16)1024) /* block number */
#define DF_BLOCK_SIZE ((Byte)8) /* block length (in page) */
#define DF_PAGE_SIZE (1024) /* page length */
#define DF_PAGE_MASK ((Byte)0x03) /* mask MSB page bits */
#define DF_MEM_MASKH ((Byte)0x01)
#define DF_MEM_MASKL ((Byte)0x80)
#define DF_MEM_BYTEH ((Byte)0)
#define DF_MEM_BYTEL ((Byte)1)
#define DF_SHFT_B1 (1)
#define DF_SHFT_B2 (7)
#define DF_NB_CYLINDER ((Uint16)511)
#define DF_NB_HEAD ((Byte)8)
#define DF_NB_SECTOR ((Byte)16)
#define DF_DISK_SIZE (Uint32)(65535)
#endif
/* Memory Size based on 512 bytes block size */
#define DF_SIZE_16MB ((Uint32)32768 - 1)
#define DF_SIZE_32MB ((Uint32)65536 - 1)
#define DF_16MB ((Byte)0)
#define DF_32MB ((Byte)1)
/*_____ D E F I N I T I O N ________________________________________________*/
/*_____ D E C L A R A T I O N ______________________________________________*/
Byte df_init (void);
void df_init_mem (void);
bit df_read_open (Uint32);
void df_read_close (void);
bit df_write_open (Uint32);
void df_write_close (void);
Byte df_read_byte (void);
bit df_read_sector (Uint16);
bit df_write_byte (Byte);
bit df_write_sector (Uint16);
s_format code * df_format (void);
/* Disk size: number of block - 1 */
#define Df_disk_size() ((Uint32)(DF_DISK_SIZE))
#define Df_disk_size_0() ((Byte)(Df_disk_size() >> 24))
#define Df_disk_size_1() ((Byte)(Df_disk_size() >> 16))
#define Df_disk_size_2() ((Byte)(Df_disk_size() >> 8))
#define Df_disk_size_3() ((Byte)(Df_disk_size()))
/* Block size: size of a block in byte */
#define Df_block_size() ((Uint32)512)
#define Df_block_size_0() ((Byte)(Df_block_size() >> 24))
#define Df_block_size_1() ((Byte)(Df_block_size() >> 16))
#define Df_block_size_2() ((Byte)(Df_block_size() >> 8))
#define Df_block_size_3() ((Byte)(Df_block_size()))
#endif /* _DF_H_ */
