sst25vf040_2005.txt

sst25vf040接口程序 可作为单片机与FPGA通信接口

/* Input:																*/
/*		Dst:		Destination Address 000000H - 07FFFFH				*/
/*		byte1:		1st byte to be programmed							*/
/*      byte1:		2nd byte to be programmed							*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/*																		*/
/************************************************************************/
void Auto_Add_IncA(unsigned long Dst, unsigned char byte1, unsigned char byte2)
{
	CE_Low();					/* enable device */
	Send_Byte(0xAD);			/* send AAI command */
	Send_Byte(((Dst & 0xFFFFFF) >> 16)); 	/* send 3 address bytes */
	Send_Byte(((Dst & 0xFFFF) >> 8));
	Send_Byte(Dst & 0xFF);
	Send_Byte(byte1);			/* send 1st byte to be programmed */	
	Send_Byte(byte2);			/* send 2nd byte to be programmed */
	CE_High();					/* disable device */
}

/************************************************************************/
/* PROCEDURE:	Auto_Add_IncB											*/
/*																		*/
/* This procedure programs consecutive addresses of 2 bytes of data into*/
/* the device:  1st data byte will be programmed into the initial 		*/
/* address [A23-A1] and with A0 = 0.  The 2nd data byte will be be 		*/
/* programmed into initial address [A23-A1] and with A0  = 1.    This  	*/
/* is used after Auto_Address_IncA.										*/
/* Assumption:  Address being programmed is already erased and is NOT	*/
/*				block protected.										*/
/*																		*/
/* Note: Only WRDI and AAI command can be executed once in AAI mode 	*/
/*	 with SO enabled as RY/BY# status.  When the device is busy 		*/
/*	 asserting CE# will output the status of RY/BY# on SO.  Use WRDI	*/
/* 	 to exit AAI mode unless AAI is programming the last address or		*/
/*	 last address of unprotected block, which automatically exits 		*/
/*	 AAI mode.															*/
/*																		*/
/* Input:																*/
/*																		*/
/*		byte1:		1st byte to be programmed							*/
/*		byte2:		2nd byte to be programmed							*/
/*      																*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/*																		*/
/************************************************************************/
void Auto_Add_IncB(unsigned char byte1, unsigned char byte2)
{
	CE_Low();					/* enable device */
	Send_Byte(0xAD);			/* send AAI command */
	Send_Byte(byte1);			/* send 1st byte to be programmed */
	Send_Byte(byte2);			/* send 2nd byte to be programmed */
	CE_High();					/* disable device */
}	

/************************************************************************/
/* PROCEDURE:	Auto_Add_IncA_EBSY										*/
/*																		*/
/* This procedure is the same as procedure Auto_Add_IncA except that it */
/* uses EBSY and Poll_SO functions to check for RY/BY. It programs		*/
/* consecutive addresses of the device.  The 1st data byte will be		*/
/* programmed into the initial address [A23-A1] and with A0 = 0.  The 	*/
/* 2nd data byte will be programmed into initial address [A23-A1] and 	*/
/* with A0  = 1.  This is used to to start the AAI process.  It should  */
/* be followed by Auto_Add_IncB_EBSY.									*/
/* Assumption:  Address being programmed is already erased and is NOT	*/
/*				block protected.										*/
/*																		*/
/*																		*/
/* Note: Only WRDI and AAI command can be executed once in AAI mode 	*/
/*	 with SO enabled as RY/BY# status.  When the device is busy			*/
/*	 asserting CE# will output the status of RY/BY# on SO.  Use WRDI	*/
/* 	 to exit AAI mode unless AAI is programming the last address or		*/
/*	 last address of unprotected block, which automatically exits		*/
/*	 AAI mode.															*/
/*																		*/
/* Input:																*/
/*		Dst:		Destination Address 000000H - 07FFFFH				*/
/*		byte1:		1st byte to be programmed							*/
/*      byte1:		2nd byte to be programmed							*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/*																		*/
/************************************************************************/
void Auto_Add_IncA_EBSY(unsigned long Dst, unsigned char byte1, unsigned char byte2)
{
	EBSY();					/* enable RY/BY# status for SO in AAI */	

	CE_Low();				/* enable device */
	Send_Byte(0xAD);			/* send AAI command */
	Send_Byte(((Dst & 0xFFFFFF) >> 16)); 	/* send 3 address bytes */
	Send_Byte(((Dst & 0xFFFF) >> 8));
	Send_Byte(Dst & 0xFF);
	Send_Byte(byte1);			/* send 1st byte to be programmed */	
	Send_Byte(byte2);			/* send 2nd byte to be programmed */
	CE_High();				/* disable device */
	
	Poll_SO();				/* polls RY/BY# using SO line */

}

/************************************************************************/
/* PROCEDURE:	Auto_Add_IncB_EBSY										*/
/*																		*/
/* This procedure is the same as Auto_Add_IncB excpet that it uses 		*/
/* Poll_SO to poll for RY/BY#.  It demonstrate on how to use DBSY after	*/
/* AAI programmming is completed.  It programs consecutive addresses of */
/* the device.  The 1st data byte will be programmed into the initial   */
/* address [A23-A1] and with A0 = 0.  The 2nd data byte will be 		*/
/* programmed into initial address [A23-A1] and with A0  = 1.  This is 	*/
/* used after Auto_Address_IncA.										*/
/* Assumption:  Address being programmed is already erased and is NOT	*/
/*				block protected.										*/
/*																		*/
/* Note: Only WRDI and AAI command can be executed once in AAI mode 	*/
/*	 with SO enabled as RY/BY# status.  When the device is busy 		*/
/*	 asserting CE# will output the status of RY/BY# on SO.  Use WRDI	*/
/* 	 to exit AAI mode unless AAI is programming the last address or		*/
/*	 last address of unprotected block, which automatically exits 		*/
/*	 AAI mode.															*/
/*																		*/
/* Input:																*/
/*																		*/
/*		byte1:		1st byte to be programmed							*/
/*		byte2:		2nd byte to be programmed							*/
/*      																*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/*																		*/
/************************************************************************/
void Auto_Add_IncB_EBSY(unsigned char byte1, unsigned char byte2)
{
	CE_Low();					/* enable device */
	Send_Byte(0xAD);			/* send AAI command */
	Send_Byte(byte1);			/* send 1st byte to be programmed */
	Send_Byte(byte2);			/* send 2nd byte to be programmed */
	CE_High();					/* disable device */

	Poll_SO();					/* polls RY/BY# using SO line */
	
	WRDI(); 					/* Exit AAI before executing DBSY */
	DBSY();						/* disable SO as RY/BY# output if in AAI */
}	

/************************************************************************/
/* PROCEDURE: Chip_Erase												*/
/*																		*/
/* This procedure erases the entire Chip.								*/
/*																		*/
/* Input:																*/
/*		None															*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Chip_Erase()
{						
	CE_Low();					/* enable device */
	Send_Byte(0x60);			/* send Chip Erase command (60h or C7h) */
	CE_High();					/* disable device */
}

/************************************************************************/
/* PROCEDURE: Sector_Erase												*/
/*																		*/
/* This procedure Sector Erases the Chip.								*/
/*																		*/
/* Input:																*/
/*		Dst:		Destination Address 000000H - 07FFFFH				*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Sector_Erase(unsigned long Dst)
{


	CE_Low();					/* enable device */
	Send_Byte(0x20);			/* send Sector Erase command */
	Send_Byte(((Dst & 0xFFFFFF) >> 16)); 	/* send 3 address bytes */
	Send_Byte(((Dst & 0xFFFF) >> 8));
	Send_Byte(Dst & 0xFF);
	CE_High();					/* disable device */
}

/************************************************************************/
/* PROCEDURE: Block_Erase_32K											*/
/*																		*/
/* This procedure Block Erases 32 KByte of the Chip.					*/
/*																		*/
/* Input:																*/
/*		Dst:		Destination Address 000000H - 07FFFFH				*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Block_Erase_32K(unsigned long Dst)
{
	CE_Low();					/* enable device */
	Send_Byte(0x52);			/* send 32 KByte Block Erase command */
	Send_Byte(((Dst & 0xFFFFFF) >> 16)); 	/* send 3 address bytes */
	Send_Byte(((Dst & 0xFFFF) >> 8));
	Send_Byte(Dst & 0xFF);
	CE_High();					/* disable device */
}	

/************************************************************************/
/* PROCEDURE: Block_Erase_64K											*/
/*																		*/
/* This procedure Block Erases 64 KByte of the Chip.					*/
/*																		*/
/* Input:																*/
/*		Dst:		Destination Address 000000H - 07FFFFH				*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Block_Erase_64K(unsigned long Dst)
{
	CE_Low();					/* enable device */
	Send_Byte(0xD8);			/* send 64KByte Block Erase command */
	Send_Byte(((Dst & 0xFFFFFF) >> 16)); 	/* send 3 address bytes */
	Send_Byte(((Dst & 0xFFFF) >> 8));
	Send_Byte(Dst & 0xFF);
	CE_High();					/* disable device */
}

/************************************************************************/
/* PROCEDURE: Wait_Busy													*/
/*																		*/
/* This procedure waits until device is no longer busy (can be used by	*/
/* Byte-Program, Sector-Erase, Block-Erase, Chip-Erase).				*/
/*																		*/
/* Input:																*/
/*		None															*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Wait_Busy()
{
	while (Read_Status_Register() == 0x03)	/* waste time until not busy */
		Read_Status_Register();
}

/************************************************************************/
/* PROCEDURE: Wait_Busy_AAI												*/
/*																		*/
/* This procedure waits until device is no longer busy for AAI mode.	*/
/*																		*/
/* Input:																*/
/*		None															*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Wait_Busy_AAI()
{
	while (Read_Status_Register() == 0x43)	/* waste time until not busy */
		Read_Status_Register();
}

/************************************************************************/
/* PROCEDURE: WREN_Check												*/
/*																		*/
/* This procedure checks to see if WEL bit set before program/erase.	*/
/*																		*/
/* Input:																*/
/*		None															*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void WREN_Check()
{
	unsigned char byte;
	byte = Read_Status_Register();	/* read the status register */
	if (byte != 0x02)				/* verify that WEL bit is set */
	{
		while(1)
			/* add source code or statements for this file */
			/* to compile   			       */
			/* i.e. option: insert a display to view error on LED? */
	}
}

/************************************************************************/
/* PROCEDURE: WREN_AAI_Check											*/
/*																		*/
/* This procedure checks for AAI and WEL bit once in AAI mode.			*/
/*																		*/
/* Input:																*/
/*		None															*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void WREN_AAI_Check()
{
	unsigned char byte;
	byte = Read_Status_Register();	/* read the status register */
	if (byte != 0x42)				/* verify that AAI and WEL bit is set */
	{
		while(1)		
			/* add source code or statements for this file */
			/* to compile   			       */
			/* i.e. option: insert a display to view error on LED? */
	}
}

/************************************************************************/
/* PROCEDURE: Verify													*/
/*																		*/
/* This procedure checks to see if the correct byte has be read.		*/
/*																		*/
/* Input:																*/
/*		byte:		byte read											*/
/*		cor_byte:	correct_byte that should be read					*/
/*																		*/
/* Returns:																*/
/*		Nothing															*/
/************************************************************************/
void Verify(unsigned char byte, unsigned char cor_byte)
{
	if (byte != cor_byte)
	{
		while(1)
			/* add source code or statement for this file */
			/* to compile   			       */
			/* i.e. option: insert a display to view error on LED? */
	}
}


int main()
{

return 0;
}