main.i

this source is for sd mmc read write in fat file system for atmega64

// CodeVisionAVR C Compiler
// (C) 1998-2006 Pavel Haiduc, HP InfoTech S.R.L.

// Prototypes for standard I/O functions


// CodeVisionAVR C Compiler
// (C) 1998-2002 Pavel Haiduc, HP InfoTech S.R.L.

// Variable length argument list macros



typedef char *va_list;





#pragma used+

char getchar(void);
void putchar(char c);
void puts(char *str);
void putsf(char flash *str);

char *gets(char *str,unsigned int len);

void printf(char flash *fmtstr,...);
void sprintf(char *str, char flash *fmtstr,...);
void snprintf(char *str, unsigned int size, char flash *fmtstr,...);
void vprintf (char flash * fmtstr, va_list argptr);
void vsprintf (char *str, char flash * fmtstr, va_list argptr);
void vsnprintf (char *str, unsigned int size, char flash * fmtstr, va_list argptr);
signed char scanf(char flash *fmtstr,...);
signed char sscanf(char *str, char flash *fmtstr,...);




                                   

            


#pragma used-

#pragma library stdio.lib


// CodeVisionAVR C Compiler
// (C) 1998-2000 Pavel Haiduc, HP InfoTech S.R.L.


#pragma used+

void delay_us(unsigned int n);
void delay_ms(unsigned int n);

#pragma used-

/*-----------------------------------------------------------------------*/
/* MMC/SDSC/SDHC (in SPI mode) control module  (C)ChaN, 2007             */
/*-----------------------------------------------------------------------*/
/* Only rcvr_spi(), xmit_spi(), disk_timerproc() and some macros         */
/* are platform dependent.                                               */
/*-----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------
/  Low level disk interface modlue include file  R0.05   (C)ChaN, 2007
/-----------------------------------------------------------------------*/




/* These types are assumed as 16-bit or larger integer */
typedef signed int		INT;
typedef signed int		INT;
typedef unsigned int	UINT;

/* These types are assumed as 8-bit integer */
typedef signed char		 CHAR;
typedef unsigned char	 UCHAR;
typedef unsigned char	 BYTE;

/* These types are assumed as 16-bit integer */
typedef signed short	  SHORT;
typedef unsigned short	USHORT;
typedef unsigned short	WORD;

/* These types are assumed as 32-bit integer */
typedef signed long		 LONG;
typedef unsigned long	 ULONG;
typedef unsigned long	 DWORD;

/* Boolean type */
typedef enum { FALSE = 0, TRUE } BOOL;



/* Status of Disk Functions */
typedef BYTE	DSTATUS;

/* Results of Disk Functions */
typedef enum {
	RES_OK = 0,		/* 0: Successful */
	RES_ERROR,		/* 1: R/W Error */
	RES_WRPRT,		/* 2: Write Protected */
	RES_NOTRDY,		/* 3: Not Ready */
	RES_PARERR		/* 4: Invalid Parameter */
} DRESULT;


/*---------------------------------------*/
/* Prototypes for disk control functions */

DSTATUS disk_initialize (BYTE);
DSTATUS disk_status (BYTE);
DRESULT disk_read (BYTE, BYTE*, DWORD, BYTE);
DRESULT disk_write (BYTE, const BYTE*, DWORD, BYTE);
DRESULT disk_ioctl (BYTE, BYTE, void*);
void	disk_timerproc (void);




/* Disk Status Bits (DSTATUS) */



/* Command code for disk_ioctrl() */

/* Generic command */
/* MMC/SDC command */
/* ATA/CF command */



/* Definitions for MMC/SDC command */

// CodeVisionAVR C Compiler
// (C) 1998-2004 Pavel Haiduc, HP InfoTech S.R.L.

// I/O registers definitions for the ATmega128


#pragma used+
sfrb PINF=0;
sfrb PINE=1;
sfrb DDRE=2;
sfrb PORTE=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      // 16 bit access
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRR0L=9;
sfrb UCSR0B=0xa;
sfrb UCSR0A=0xb;
sfrb UDR0=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   // 16 bit access
sfrb SFIOR=0x20;
sfrb WDTCR=0x21;
sfrb OCDR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrw ICR1=0x26;   // 16 bit access
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  // 16 bit access
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  // 16 bit access
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  // 16 bit access
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb ASSR=0x30;
sfrb OCR0=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TIFR=0x36;
sfrb TIMSK=0x37;
sfrb EIFR=0x38;
sfrb EIMSK=0x39;
sfrb EICRB=0x3a;
sfrb RAMPZ=0x3b;
sfrb XDIV=0x3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-


// Interrupt vectors definitions


// Needed by the power management functions (sleep.h)
#asm
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x20
	.EQU __sm_mask=0x1C
	.EQU __sm_powerdown=0x10
	.EQU __sm_powersave=0x18
	.EQU __sm_standby=0x14
	.EQU __sm_ext_standby=0x1C
	.EQU __sm_adc_noise_red=0x08
	.SET power_ctrl_reg=mcucr
	#endif
#endasm




                    /* 1 means use TINY FAT firmware for low memory systems but without FAT32 support*/


/*--------------------------------------------------------------------------
/  This is SPI pins defenitions for ATmega32 or ATmega16
/  you have to set this pins currectly if you want
/  to run this codes on other AVR chips   */
    /*	
 #define SPI_DI				    6		
 #define SPI_DO				    5		
 #define SPI_Clock			  7		
 #define MMC_Chip_Select	3		
 #define SPI_SS				    4	*/
     
      /*--------------------------------------------------------------------------*/

/* Port Controls  (Platform dependent) */
/*--------------------------------------------------------------------------
 Module Private Functions
---------------------------------------------------------------------------*/

static volatile
DSTATUS Stat = 0x01	;	/* Disk status */

static volatile
BYTE Timer1, Timer2;	/* 100Hz decrement timer */

static
BYTE CardType;			/* b0:MMC, b1:SDv1, b2:SDv2, b3:Block addressing */

/*-----------------------------------------------------------------------*/
/* Transmit a byte to MMC via SPI  (Platform dependent)                  */
/*-----------------------------------------------------------------------*/


/*-----------------------------------------------------------------------*/
/* Receive a byte from MMC via SPI  (Platform dependent)                 */
/*-----------------------------------------------------------------------*/

static
BYTE rcvr_spi (void)
{
	SPDR = 0xFF; 
	while(!(SPSR & (1<<7)));
	return SPDR;
}

/* Alternative macro to receive data fast */

/*-----------------------------------------------------------------------*/
/* Wait for card ready                                                   */
/*-----------------------------------------------------------------------*/

static
BYTE wait_ready (void)
{
	BYTE res;

	Timer2 = 50;	/* Wait for ready in timeout of 500ms */
	rcvr_spi();
	do
		res = rcvr_spi();
	while ((res != 0xFF) && Timer2);

	return res;
}

/*-----------------------------------------------------------------------*/
/* Deselect the card and release SPI bus                                 */
/*-----------------------------------------------------------------------*/

static
void release_spi (void)
{
	PORTD.7		 = 1; ;
	rcvr_spi();
}

/*-----------------------------------------------------------------------*/
/* Power Control  (Platform dependent)                                   */
/*-----------------------------------------------------------------------*/
/* When the target system does not support socket power control, there   */
/* is nothing to do in these functions and chk_power always returns 1.   */

static
void power_on (void)
{
  //PORTB |= 1;				/* Socket power ON */
	for (Timer1 = 3; Timer1; );	/* Wait for 30ms */

	DDRB	 &=~(1<<3		);			//Setzen von Pin MMC_DI auf Input
	DDRB	 |= (1<<1		);		//Setzen von Pin MMC_Clock auf Output
	DDRB	 |= (1<<2		);			//Setzen von Pin MMC_DO auf Output
	DDRD.7 = 1; //SPI_DDR |= (1<<MMC_Chip_Select);	//Setzen von Pin MMC_Chip_Select auf Output
	DDRB	 |= (1<<0	);	
	PORTD.7		 = 1; //SPI_DDR |= (1<<MMC_Chip_Select);			//Setzt den Pin MMC_Chip_Select auf High Pegel

  //PORTB = 0b10110101;			/* Enable drivers */
  //DDRB  = 0b11000111;
	SPCR = (1<<6)|(1<<4) ;/* Initialize SPI port (Mode 0) */
	SPSR = (1<<0);
}

static
void power_off (void)
{
	PORTD.7		 = 0; ;				/* Wait for card ready */
	wait_ready();
	release_spi();

	SPCR = 0;				/* Disable SPI function */
  //DDRB  = 0b11000000;		/* Disable drivers */
  //PORTB = 0b10110000;            
  //PORTB &=  0xFE;			/* Socket power OFF */
	Stat |= 0x01	;		/* Set STA_NOINIT */
}

static
int chk_power(void)		/* Socket power state: 0=off, 1=on */
{
  //return (PORTE & 0x80) ? 0 : 1;
	return (1);
}

/*-----------------------------------------------------------------------*/
/* Receive a data packet from MMC                                        */
/*-----------------------------------------------------------------------*/

static
BOOL rcvr_datablock (
	BYTE *buff,			/* Data buffer to store received data */
	UINT btr			/* Byte count (must be even number) */
)
{
	BYTE token;
	Timer1 = 10;
	do {							/* Wait for data packet in timeout of 100ms */
		token = rcvr_spi();
	} while ((token == 0xFF) && Timer1);
	if(token != 0xFE) return FALSE;	/* If not valid data token, retutn with error */

	do {							/* Receive the data block into buffer */
		SPDR=0xFF;  while(!(SPSR & (1<<7))); *(buff++)=SPDR;
		SPDR=0xFF;  while(!(SPSR & (1<<7))); *(buff++)=SPDR;
	} while (btr -= 2);
	rcvr_spi();						/* Discard CRC */
	rcvr_spi();

	return TRUE;					/* Return with success */
}

/*-----------------------------------------------------------------------*/
/* Send a data packet to MMC                                             */
/*-----------------------------------------------------------------------*/

static
BOOL xmit_datablock (
	const BYTE *buff,	/* 512 byte data block to be transmitted */
	BYTE token			/* Data/Stop token */
)
{
	BYTE resp, wc;


	if (wait_ready() != 0xFF) return FALSE;

	SPDR=(token);  while(!(SPSR & (1<<7)));					/* Xmit data token */
	if (token != 0xFD) {	/* Is data token */
		wc = 0;
		do {							/* Xmit the 512 byte data block to MMC */
			SPDR=(*buff++);  while(!(SPSR & (1<<7)));
			SPDR=(*buff++);  while(!(SPSR & (1<<7)));
		} while (--wc);
		SPDR=(0xFF);  while(!(SPSR & (1<<7)));					/* CRC (Dummy) */
		SPDR=(0xFF);  while(!(SPSR & (1<<7)));