cf.h

来自「Build ourself a MP3 Player」· C头文件 代码 · 共 44 行

#define CF_A0      PIN_E0
#define CF_A1      PIN_E1
#define CF_A2      PIN_E2

#define CF_OE      PIN_A1
#define CF_WE      PIN_A2
#define CF_READY   PIN_A3
#define CF_RESET   PIN_A5
#define CF_CD      PIN_C5
#define CF_CE	    PIN_B0
#define TRIS_D_INPUT  0xFF  	// 11111111
#define TRIS_D_OUTPUT 0x00  	// 00000000

#byte CF_DATA	= 0x08  	/* Port D */
#byte CF_DATA_TRIS = 0x88 	/* Port D TRIS */

// wait for the CF RDY line to go high, ie ready for next command
#define waitforready()  while (!input(CF_READY))

#define  REG_DATA		0x00	// ADDRESS OF DATA REGISTER
#define  REG_ERROR		0x01	// ADDRESS OF ERROR REGISTER
#define  REG_FEATURES		0x01	// ADDRESS OF FEATURES REGISTER
#define  REG_SECTORCOUNT	0x02	// ADDRESS OF SECTOR COUNT REGISTER
#define  REG_SECTORNUM		0x03	// ADDRESS OF SECTOR NUMBER REGISTER
#define  REG_CYLINDERLOW	0x04	// ADDRESS OF LOW CYLINDER REGISTER
#define  REG_CYLINDERHIGH	0x05	// ADDRESS OF HIGH CYLINDER REGISTER
#define  REG_HEAD		0x06	// ADDRESS OF HEAD/DRIVE REGISTER
#define  REG_STATUS		0x07	// ADDRESS OF STATUS REGISTER
#define  REG_COMMAND		0x07	// ADDRESS OF COMMAND REGISTER


#define  COMMAND_IDENTIFY	   0xEC
#define  COMMAND_WRITESECTOR	0x30
#define  COMMAND_READSECTOR	0x20

#define CF_OK 0
#define NO_CF 1

boolean CF_isReady();
boolean CF_isBusy(void);
void CF_taskFileWrite(byte, byte);
byte CF_ReadByte(void);
void CF_WriteByte(byte data);