const.h

e1c0df5d-c8bc-48a5-bc02-a2b7c51c0dbf是做mp3的源代码

#ifndef _CONST_
#define _CONST_

#define DIR_UP 1
#define DIR_DOWN 2

#define F_CPU 8000000
#define TI1_H	(((unsigned int)-(F_CPU / 2560)) >> 8)
#define TI1_L	(((unsigned int)-(F_CPU / 2560)) & 0xff)

#define SPI_SEND(a) outp(a, SPDR); while(!(SPSR & (1 << SPIF)));
#define SPI_ENABLE sbi(SPCR, SPE);
#define SPI_DISABLE cbi(SPCR, SPE);

#define DREQ_PIN	PD0
#define BUTTON_1	PE0
#define BUTTON_2	PD1
#define BUTTON_3	PD4
#define BUTTON_4	PD5
#define LED_PIN		PB0
#define RESET_PIN	PB1		// reset for VS1001
#define CHARGE_PORT	PORTE
#define CHARGE_PIN	PE1		// ALE pin

#define CMD_PLAY 1
#define CMD_STOP 2
#define CMD_NEXT 3
#define CMD_PREV 4
#define CMD_VOLDOWN 5
#define CMD_VOLUP 6
#define CMD_OFF 7
#define CMD_MENU 8
#define KEYLOCK 9

#define BUTTON_PLAY 0x01
#define BUTTON_STOP 0x02
#define BUTTON_FF 0x03
#define BUTTON_REW 0x04
#define BUTTON_LOCK 0x05
#define WAIT_RELEASE 0x0f

#define EE_VOLUME 0x001
#define EE_FILENR 0x002
#define EE_CONTRAST 0x004
#define EE_LOUDNESS 0x005
#define EE_LOCKTIME 0x006
#define EE_BLTIME 0x007
#define EE_PLAYMODE 0x008
#define EE_BLMODE 0x009
#define EE_TIMEDISP 0x010
#define EE_DIRCLUSTER 0x011

#define SCROLLSPEED 4
#define LCDUPDATEFREQ 4

#define LOCKTIME 150

#define F_VS1001 (6144 + 0x8000)		// clock doubler value for 12.288 MHz crystal

//#define REMOTE 1
//#define PLAYER 1

#define PAUSE 2					// constants for play modes
#define PLAY 1

#define TYPE_ANY 0
#define TYPE_DIR 1
#define TYPE_M3U 2
#define TYPE_MP3 3

#define NOID3 0
#define DOID3 1

#endif