romnandflash.c

NandFlash 读写程序

//;==============================================================================
//; Function:		RomOpenNandFlash
//; Input:   		none
//; Output:		    none
//; Description:	Initialize hardware 
void RomOpenNFlash(void)
{
	enable_module_clk(PMC_NAND);
	clear_int_mask(INTR_NAND_READY);
	enable_mcu_int(INTR_NAND_READY,INT_PRIORITY);
	P_NAND_CFG = NANDFLASH_CFG;
	P_NAND_CMD = 0xff;
	mzEventFlag = ClearBit(mzEventFlag,NAND_EVENT);
		
	return;
}

//;==============================================================================
//; Function:		RomCloseNandFlash
//; Input:   		none
//; Output:		    none
//; Description:	
void RomCloseNFlash(void)
{
	disable_module_clk(PMC_NAND);
	set_int_mask(INT_PRIORITY);
	disable_mcu_int(INTR_NAND_READY);
	mzEventFlag = SetBit(mzEventFlag,NAND_EVENT);
	
	return;
}

//;==============================================================================
//; Function:		NFlsh_EraseBlock
//; Input:   		mBlockID --- the erased block ID 
//; Output:		    TRUE:success FALSE:unsuccessful
//; Description:	Initialize hardware 
BOOL NFlsh_EraseBlock(UINT16 mBlockID)
{
	UINT8 aReg;
	UINT32 mNandAddr;
	
	if( mBlockID > MAX_BLOCK)
		return FALSE;
		
	mNandAddr = mBlockID*NFlashBlockSize;
	RomOpenNFlash();
	P_NAND_CMD = 0x60;	
	
	aReg = (UINT8)(0x0ff&(mNandAddr>>12));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>20));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x001&(mNandAddr>>28));
	P_NAND_ADD = aReg;

	P_NAND_CMD = 0xD0;
	
	while(CheckBit(mzEventFlag,NAND_FLAG)==FALSE);
	
	P_NAND_CMD = 0x70;
	aReg = P_NAND_DATA;
	RomCloseNFlash();
	
	if( (aReg&0x01) == 1 )
		return FALSE;
	else
		return TRUE;	
}

//;==============================================================================
//; Function:		NFlsh_WritePageAll
//; Input:   		mBlockID --- the write block ID
//;					wPageID  --- the write Page  ID 
//; Output:		    TRUE:success FALSE:unsuccessful
//; Description:	Initialize hardware 
BOOL NFlsh_WritePage(UINT16 mBlockID, UINT16 mPageID, UINT8 *pBuffer)
{
	UINT8 aReg;
	UINT16 mNum;
	UINT32 mNandAddr;
	
	if( mBlockID > MAX_BLOCK )
		return FALSE;
	if( mPageID > MAX_PAGE )
	mNandAddr = mBlockID*NFlashBlockSize + mPageID*NFlashPageSize;
	RomOpenNFlash();
	P_NAND_CMD = 0x80;	
	
	aReg = (UINT8)(0x0ff&(mNandAddr>>0));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x00f&(mNandAddr>>8));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>12));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>20));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x001&(mNandAddr>>28));
	P_NAND_ADD = aReg;
	for(mNum=0;mNum<NFlashPageSize;mNum++)
		P_NAND_DATA = *(pBuffer+mNum);
		
	P_NAND_CMD = 0x10;	
	while(CheckBit(mzEventFlag,NAND_FLAG)==FALSE);	
	P_NAND_CMD = 0x70;
	aReg = P_NAND_DATA;
	RomCloseNFlash();
	
	if( (aReg&0x01) == 1 )
		return FALSE;
	else
		return TRUE;
}
//;==============================================================================
//; Function:		RomOpenNandFlash
//; Input:   		none
//; Output:		    none
//; Description:	Initialize hardware 
UINT8 NFlash_ReadByte(UINT32 *mNandFlashAddr)
{
	UINT8 aReg;
	UINT32 mNandAddr;
	
	mNandAddr = (UINT32)mNandFlashAddr;
	
	RomOpenNFlash();
	
	P_NAND_CMD = 0x00;
	
	aReg = (UINT8)(0x0ff&(mNandAddr>>0));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x00f&(mNandAddr>>8));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>12));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>20));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x001&(mNandAddr>>28));
	P_NAND_ADD = aReg;
	
	P_NAND_CMD = 0x30;
	while(CheckBit(mzEventFlag,NAND_FLAG)==FALSE);
	
	aReg = P_NAND_DATA;
	
	RomCloseNFlash();
	
	return aReg;	
}

BOOL NFlsh_ReadPage(UINT16 mBlockID, UINT16 mPageID, UINT8 *pBuffer)
{
	UINT8 aReg;
	UINT16 mNum;
	UINT32 mNandAddr;
	
	if( mBlockID > MAX_BLOCK )
		return FALSE;
	if( mPageID > MAX_PAGE )
	mNandAddr = mBlockID*NFlashBlockSize + mPageID*NFlashPageSize;
	RomOpenNFlash();
	P_NAND_CMD = 0x00;	
	
	aReg = (UINT8)(0x0ff&(mNandAddr>>0));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x00f&(mNandAddr>>8));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>12));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x0ff&(mNandAddr>>20));
	P_NAND_ADD = aReg;
	aReg = (UINT8)(0x001&(mNandAddr>>28));
	P_NAND_ADD = aReg;
		
	P_NAND_CMD = 0x30;	
	while(CheckBit(mzEventFlag,NAND_FLAG)==FALSE);	
	for(mNum=0;mNum<NFlashPageSize;mNum++)
		*(pBuffer+mNum) = P_NAND_DATA;

	RomCloseNFlash();
	
	return TRUE;
}