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/******** Example Code : Accessing Atmel AT45Dxxx dataflash on STK500 ******* 
 
Device      : 	AT90S8515 
 
File name   : 	dataflash.h 
 
Description : 	Defines and prototypes for AT45Dxxx 
                  
Last change:    16 Aug 2001   AS 
  
****************************************************************************/ 
 
#ifndef __DATAFLASH_INCLUDED 
#define __DATAFLASH_INCLUDED 
#endif 
 
#define FALSE  0 
#define TRUE !FALSE 
 
//General macro definitions 
 
#define SetBit(x,y)		(x |= (y)) 
#define ClrBit(x,y)		(x &=~(y)) 
#define ChkBit(x,y)		(x  & (y)) 
 
 
//Dataflash opcodes 
#define FlashPageRead				0x52	// Main memory page read 
#define FlashToBuf1Transfer 		0x53	// Main memory page to buffer 1 transfer 
#define Buf1Read					0x54	// Buffer 1 read 
#define FlashToBuf2Transfer 		0x55	// Main memory page to buffer 2 transfer 
#define Buf2Read					0x56	// Buffer 2 read 
#define StatusReg					0x57	// Status register 
#define AutoPageReWrBuf1			0x58	// Auto page rewrite through buffer 1 
#define AutoPageReWrBuf2			0x59	// Auto page rewrite through buffer 2 
#define FlashToBuf1Compare    		0x60	// Main memory page to buffer 1 compare 
#define FlashToBuf2Compare	    	0x61	// Main memory page to buffer 2 compare 
#define ContArrayRead				0x68	// Continuous Array Read (Note : Only A/B-parts supported) 
#define FlashProgBuf1				0x82	// Main memory page program through buffer 1 
#define Buf1ToFlashWE   			0x83	// Buffer 1 to main memory page program with built-in erase 
#define Buf1Write					0x84	// Buffer 1 write 
#define FlashProgBuf2				0x85	// Main memory page program through buffer 2 
#define Buf2ToFlashWE   			0x86	// Buffer 2 to main memory page program with built-in erase 
#define Buf2Write					0x87	// Buffer 2 write 
#define Buf1ToFlash     			0x88	// Buffer 1 to main memory page program without built-in erase 
#define Buf2ToFlash		         	0x89	// Buffer 2 to main memory page program without built-in erase 
 
//Dataflash macro definitions 
#define DF_CS_active	cbi(PORTD,6) 
#define DF_CS_inactive	sbi(PORTD,6) 
 
 
//Function definitions 
void DF_SPI_init (void); 
unsigned char DF_SPI_RW (unsigned char output); 
unsigned char Read_DF_status (void); 
void Page_To_Buffer (unsigned int PageAdr, unsigned char BufferNo); 
unsigned char Buffer_Read_Byte (unsigned char BufferNo, unsigned int IntPageAdr); 
void Buffer_Read_Str (unsigned char BufferNo, unsigned int IntPageAdr, unsigned int No_of_bytes, unsigned char *BufferPtr); 
void Buffer_Write_Enable (unsigned char BufferNo, unsigned int IntPageAdr); 
void Buffer_Write_Byte (unsigned char BufferNo, unsigned int IntPageAdr, unsigned char Data); 
void Buffer_Write_Str (unsigned char BufferNo, unsigned int IntPageAdr, unsigned int No_of_bytes, unsigned char *BufferPtr); 
void Buffer_To_Page (unsigned char BufferNo, unsigned int PageAdr); 
void Cont_Flash_Read_Enable (unsigned int PageAdr, unsigned int IntPageAdr);