obj_svcdataflash.c

AT91rm9200的引导代码

    pSvcDataFlash->DataFlashDesc.rx_data_size = sizeToRead;
    pSvcDataFlash->DataFlashDesc.tx_data_pt = dataBuffer;
    pSvcDataFlash->DataFlashDesc.tx_data_size = sizeToRead;

	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pSvcDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
}

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_DataFlashReadBuffer
//* Object              : Read the dataflash SRAM Buffer 1 or 2
//* Input Parameters    : DataFlash Service
//*						: <BufferCommand> = Buffer 1 or 2
//*                     : <*dataBuffer> = data buffer pointer
//*                     : <SizeToRead> = data buffer size
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_DataFlashReadBuffer (
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_int bufferAddress,
	u_char *dataBuffer,
	int sizeToRead )
{
	//* Test if the buffer command is legal
	if ((BufferCommand != DB_BUF1_READ) && (BufferCommand != DB_BUF2_READ))
		return DATAFLASH_BAD_COMMAND;
	
	//* buffer address must be lower than page size 
	if (bufferAddress > pSvcDataFlash->pDevice->pages_size)
		return DATAFLASH_BAD_ADDRESS;

	if ( (pSvcDataFlash->DataFlashDesc.state) != IDLE)
		return DATAFLASH_BUSY;
	
	/*Format the buffer read command  */	
	pSvcDataFlash->DataFlashDesc.command[0] = BufferCommand;
	pSvcDataFlash->DataFlashDesc.command[1] = 0;
    pSvcDataFlash->DataFlashDesc.command[2] = (u_char)(((u_int)(bufferAddress & pSvcDataFlash->pDevice->byte_mask)) >> 8) ;
    pSvcDataFlash->DataFlashDesc.command[3] = (u_char)((u_int)bufferAddress & 0x00FF) ;
	pSvcDataFlash->DataFlashDesc.command[4] = 0;
	
    pSvcDataFlash->DataFlashDesc.tx_cmd_pt 	 = pSvcDataFlash->DataFlashDesc.command ;
    pSvcDataFlash->DataFlashDesc.tx_cmd_size = 5 ;
    pSvcDataFlash->DataFlashDesc.rx_cmd_pt 	 = pSvcDataFlash->DataFlashDesc.command ;
    pSvcDataFlash->DataFlashDesc.rx_cmd_size = 5 ;

    pSvcDataFlash->DataFlashDesc.rx_data_pt	  = dataBuffer ;
    pSvcDataFlash->DataFlashDesc.tx_data_pt   = dataBuffer ;
    pSvcDataFlash->DataFlashDesc.rx_data_size = sizeToRead ;
    pSvcDataFlash->DataFlashDesc.tx_data_size = sizeToRead ;

    AT91F_SpiWrite(&(pSvcDataFlash->DataFlashDesc)) ;
		
	return DATAFLASH_OK;
}

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_MainMemoryToBufferTransfert
//* Object              : Read a page in the SRAM Buffer 1 or 2
//* Input Parameters    : DataFlash Service
//*                     : Page concerned
//*                     : 
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_MainMemoryToBufferTransfert(	
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_int page)
{ 
	//* Test if the buffer command is legal
	if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
		return DATAFLASH_BAD_COMMAND;
	
	//* no data to transmit or receive
    pSvcDataFlash->DataFlashDesc.tx_data_size = 0;

	return(AT91F_DataFlashSendCommand (pSvcDataFlash, BufferCommand, 4, page*pSvcDataFlash->pDevice->pages_size));
}

///////////////////////////////////////////////////////////////////////////////////////////
//	Write Functions
///////////////////////////////////////////////////////////////////////////////////////////

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_DataFlashPagePgmBuf
//* Object              : Main memory page program through buffer 1 or buffer 2
//* Input Parameters    : DataFlash Service
//*						: <*src> = Source buffer
//*                     : <dest> = dataflash destination address
//*                     : <SizeToWrite> = data buffer size
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_DataFlashPagePgmBuf(
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_char *src,
	u_int dest,
	u_int SizeToWrite)
{
	//* Test if the buffer command is legal
	if ((BufferCommand != DB_PAGE_PGM_BUF1) && (BufferCommand != DB_PAGE_PGM_BUF2))
		return DATAFLASH_BAD_COMMAND;
		
    pSvcDataFlash->DataFlashDesc.tx_data_pt = src ;
    pSvcDataFlash->DataFlashDesc.tx_data_size = SizeToWrite ;
    pSvcDataFlash->DataFlashDesc.rx_data_pt = src;
    pSvcDataFlash->DataFlashDesc.rx_data_size = SizeToWrite;

	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pSvcDataFlash, BufferCommand, 4, dest));
}

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_DataFlashWriteBuffer
//* Object              : Write data to the internal sram buffer 1 or 2
//* Input Parameters    : DataFlash Service
//*						: <BufferCommand> = command to write buffer1 or buffer2
//*                     : <*dataBuffer> = data buffer to write
//*                     : <bufferAddress> = address in the internal buffer
//*                     : <SizeToWrite> = data buffer size
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_DataFlashWriteBuffer (
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_char *dataBuffer,
	u_int bufferAddress,
	int SizeToWrite )
{
	//* Test if the buffer command is legal
	if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
		return DATAFLASH_BAD_COMMAND;
		
	//* buffer address must be lower than page size
	if (bufferAddress > pSvcDataFlash->pDevice->pages_size)
		return DATAFLASH_BAD_ADDRESS;

	if ( (pSvcDataFlash->DataFlashDesc.state)  != IDLE)
		return DATAFLASH_BUSY;
		
    //* Send first Write Command
    pSvcDataFlash->DataFlashDesc.command[0] = BufferCommand;
	pSvcDataFlash->DataFlashDesc.command[1] = 0;
    pSvcDataFlash->DataFlashDesc.command[2] = (u_char)(((u_int)(bufferAddress &  pSvcDataFlash->pDevice->byte_mask)) >> 8) ;
    pSvcDataFlash->DataFlashDesc.command[3] = (u_char)((u_int)bufferAddress  & 0x00FF) ;

    pSvcDataFlash->DataFlashDesc.tx_cmd_pt 	 = pSvcDataFlash->DataFlashDesc.command ;
    pSvcDataFlash->DataFlashDesc.tx_cmd_size = 4 ;
    pSvcDataFlash->DataFlashDesc.rx_cmd_pt 	 = pSvcDataFlash->DataFlashDesc.command ;
    pSvcDataFlash->DataFlashDesc.rx_cmd_size = 4 ;

    pSvcDataFlash->DataFlashDesc.rx_data_pt 	= dataBuffer ;
    pSvcDataFlash->DataFlashDesc.tx_data_pt 	= dataBuffer ;
    pSvcDataFlash->DataFlashDesc.rx_data_size 	= SizeToWrite ;
    pSvcDataFlash->DataFlashDesc.tx_data_size 	= SizeToWrite ;

    AT91F_SpiWrite( &pSvcDataFlash->DataFlashDesc );

	return DATAFLASH_OK;
}

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_WriteBufferToMain
//* Object              : Write buffer to the main memory
//* Input Parameters    : DataFlash Service
//*						: <BufferCommand> = command to send to buffer1 or buffer2
//*                     : <dest> = main memory address
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_WriteBufferToMain (	
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_int dest )
{
	//* Test if the buffer command is correct
	if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
		(BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
		(BufferCommand != DB_BUF2_PAGE_PGM) &&
		(BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
		return DATAFLASH_BAD_COMMAND;
		
	//* no data to transmit or receive
    pSvcDataFlash->DataFlashDesc.tx_data_size = 0;
	
	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pSvcDataFlash, BufferCommand, 4, dest));
}

///////////////////////////////////////////////////////////////////////////////////////////
//	Erase Functions
///////////////////////////////////////////////////////////////////////////////////////////

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_PageErase
//* Object              : Erase a page in dataflash
//* Input Parameters    : DataFlash Service
//*						: <PageNumber> = Number of the page to erase
//*                     : 
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_PageErase (	
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_int PageNumber)
{
    pSvcDataFlash->DataFlashDesc.tx_data_size = 0;
	
	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pSvcDataFlash, DB_PAGE_ERASE, 4, PageNumber*pSvcDataFlash->pDevice->pages_size));
}


//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_BlockErase
//* Object              : Erase a block of 8 pages
//* Input Parameters    : DataFlash Service
//*						: <BlockNumber> = number of the block to erase
//*                     : 
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_BlockErase (	
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_int BlockNumber )
{
    pSvcDataFlash->DataFlashDesc.tx_data_size = 0;
	
	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pSvcDataFlash, DB_BLOCK_ERASE, 4, BlockNumber*8*pSvcDataFlash->pDevice->pages_size));
}

///////////////////////////////////////////////////////////////////////////////////////////
//	Compare Functions
///////////////////////////////////////////////////////////////////////////////////////////

//*-----------------------------------------------------------------------------
//* Function Name       : AT91F_MainMemoryToBufferCompare
//* Object              : Compare the contents of a page and one of the sram buffer
//* Input Parameters    : DataFlash Service
//*						: <BufferCommand> :specify the sram buffer to compare
//*                     : <page> : specify the page to compare
//*						: then after that operation, check the 6th bit of the status register
//* Return value		: State of the dataflash
//*-----------------------------------------------------------------------------
AT91S_SvcDataFlashStatus AT91F_MainMemoryToBufferCompare(	
	AT91PS_SvcDataFlash pSvcDataFlash,
	u_char BufferCommand,
	u_int page)
{
	//* Test if the buffer command is legal
	if ((BufferCommand != DB_PAGE_2_BUF1_CMP ) && (BufferCommand != DB_PAGE_2_BUF2_CMP ))
		return DATAFLASH_BAD_COMMAND;
		
	//* no data to transmit or receive
    pSvcDataFlash->DataFlashDesc.tx_data_size = 0;

	return(AT91F_DataFlashSendCommand (pSvcDataFlash, BufferCommand, 4, page*pSvcDataFlash->pDevice->pages_size));		
}