compact.h

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//#########################################################################
// File: compact.h
//
// CompactFlash hardware definitions
//
//#########################################################################
// Last change: 21.04.2003
//#########################################################################
// [e-mail]
// http://home.t-online.de/home/holger.klabunde/homepage.htm
//#########################################################################
// Compiler: AVR-GCC 3.2
//#########################################################################

#ifndef __COMPACT_FLASH_H
#define __COMPACT_FLASH_H

#define DEBUG

#include <avr/io.h>
#include <inttypes.h>

#define BYTE_PER_SEC 512	//FAT, 512 bytes per sector
#define NOP() asm volatile("nop" ::)

//CF register adresses
#define CF_IO		0	//IO-Port
#define CF_FEATURES	1	//Errors Out / Features In
#define CF_SECCOUNT	2	//Sectorcount
#define CF_LBA0		3	//LBA 0-7
#define CF_LBA1		4	//LBA 8-15
#define CF_LBA2		5	//LBA 16-23
#define CF_LBA3		6	//LBA 24-27
#define CF_STACOM	7	//Status Out / Command In

//ATAPI commands
#define CF_READ_SEC	0x20
#define CF_WRITE_SEC    0x30
#define CF_IDENTIFY     0xEC

//#define SER_BIN		1  //DumpSector() output in binary
//#define SER_HEX		1  //ASCII-HEX

//port where data i/o has to be done
//without pullups on PortA some CF do not work !
//maybe for some CF ATMegas internal pullups are to weak.
//then use 10k external pullups on port and please use short
//cables (max. 30cm)
#define CF_DATA_DIR_IN()  	DDRA=0x00; PORTA=0xFF; // set io-pins to inputs, Pullups
#define CF_DATA_DIR_OUT() 	DDRA=0xFF; // set io-pins to outputs
#define CF_READ_DATA()    	PINA	  // read PIN, ! NOT ! PORT
#define CF_WRITE_DATA(a)  	PORTA=(a); // write to data port

#define CF_ADR_PORT 	PORTC   //Port CF_Adresspins ( D0..3 )
#define CF_ADR_PIN 	PINC    

#define CF_CS 		PC7	//Pin number for CF_CS
#define CF_CS_PORT 	PORTC   //Port where CF_CS is located
#define CF_CS_ON() 	sbi(CF_CS_PORT,CF_CS);
#define CF_CS_OFF() 	cbi(CF_CS_PORT,CF_CS);

#define CF_RD 		PC6	//Pin number for CF_RD
#define CF_RD_PORT 	PORTC   //Port where CF_RD is located
#define CF_RD_ON() 	sbi(CF_RD_PORT,CF_RD);
#define CF_RD_OFF() 	cbi(CF_RD_PORT,CF_RD);

#define CF_WR 		PC5	//Pin number for CF_WR
#define CF_WR_PORT 	PORTC   //Port where CF_WR is located
#define CF_WR_ON() 	sbi(CF_WR_PORT,CF_WR);
#define CF_WR_OFF() 	cbi(CF_WR_PORT,CF_WR);


//prototypes
unsigned char secbuf[512]; //Sectorbuffer
extern unsigned long maxsect;
extern unsigned int heads, sectors_per_track;

unsigned char CFReadSector(unsigned long lba); // __attribute__ ((section(".bootloader"))) ;
unsigned char CFWaitReady(void); // __attribute__ ((section(".bootloader")));
unsigned char CFWaitDrq(void); // __attribute__ ((section(".bootloader")));
void CFWriteAdr(unsigned char adr, unsigned char dat); // __attribute__ ((section(".bootloader")));
void CFSetAdr(unsigned char adr); // __attribute__ ((section(".bootloader")));
unsigned char CFReadAdr(unsigned char adr); // __attribute__ ((section(".bootloader")));
unsigned char CFIdentify(); //  __attribute__ ((section(".bootloader")));
unsigned char CFRead(void); // __attribute__ ((section(".bootloader")));

#endif