64m_qdre.c

SLICION7的Flash驱动程序

/*****************************************************************************
*
*   File name : 64M_QDRE.c
*               The Quick Data Reclaim sample program file for 64Mbit Flash 
*   Version   : 0.40.10
*   CPU       : SH7709A
*   Compiler  : SHC V.5.1C
*   Author    : S.Ishimoto, F.Saeki
*
*   The information described here may contain technical inaccuracies or
*   typographical errors. Renesas technology Corporation and Renesas Solutions
*   and Oyo Electric Corporation assume no responsibility for any damage, 
*   liability, or other loss rising from these inaccuracies or errors.
*
*   Copyright (c) 2000-2003
*   Renesas Technology Coporation and Renesas Solutions Corporation
*   and Oyo Electric Corporation All Rights Reserved
*
*  ---------------------------------------------------------------------------
*   This sample program provides C code for using the Renesas
*   64Mbit(4Mb x16) NOR type Flash Memory and MCP(Multi Chip Package).
*   The following typical devices are supported in this file.
*       M5M29KB/T641AVP
*       M6MGB/T641S4TP
*       M6MGB/T641S8AKT
*       M6MGB/T647M17AKT
*       M6MGB/T647M34CKT
*       M6MGB/T64BS4AWG
*       M6MGB/T64BS8AWG
*       M6MGB/T64BM17AWG
*       M6MGB/T64BM34CWG
*
*   The following function commands are available in this file.
*       FmQuickDataReclaim()           Quick Data Reclaim
*
*  ---------------------------------------------------------------------------
*   Version History:  Ver. 0.10.00 '00/08/09 First release
*                     Ver. 0.20.00 '01/09/04 Change some comments
*                     Ver. 0.30.00 '01/10/16 Change some comments
*                     Ver. 0.40.00 '03/03/07 Change some comments
*                     Ver. 0.40.10 '03/08/22 Change of a product type name
*                                            Change of a comment(NOR type)
*****************************************************************************/
#define	TRUE	1
#define	FALSE	0


/*****************************************************************************
*  FmQuickDataReclaim()  Quick Data Reclaim
*  ---------------------------------------------------------------------------
*  Declaration  int FmQuickDataReclaim(unsigned short *pProgStart, 
*                                      unsigned short *pQDRStart)
*  ---------------------------------------------------------------------------
*  Description  The 1-page data of a flash memory is copied to another address.  
*               The data of the address specified using the Flash to Page Buffer
*               command is read into a page buffer. Data is programmed to the 
*               address specified using the Page Buffer to Flash command.
*               The data of the address to program must be erased.
*  ---------------------------------------------------------------------------
*  Parameter    unsigned short *pProgStart; Program start address
*               unsigned short *pQDRStart;  Start address of the data to be programed
*  ---------------------------------------------------------------------------
*  return value int Errflg;
*                TRUE : Program normal stop
*                FALSE: Program abnormal stop
*  ---------------------------------------------------------------------------
*  No Related Function
*  ---------------------------------------------------------------------------
*  Note         Please do not optimize the polling portion of a status register.
*  ---------------------------------------------------------------------------
*  Version      Ver. 0.10.00 '00/08/09 First release
*               Ver. 0.20.00 '01/09/04 In error determination
*                                      if ((*pEraseStart & 0x10) == 0x10) {
*                                   -> if ((*pEraseStart & 0x38) != 0x00) {
*               Ver. 0.40.00 '03/03/07 Change some comments
*****************************************************************************/
int FmQuickDataReclaim(unsigned short *pProgStart,unsigned short *pQDRStart)
{
	int Errflg = TRUE;						/* Error Flag */

	/*==== Copy from source data to Page Buffer ====*/

	/***** Output of Flash to Page Buffer Command *****/
	*pQDRStart = 0xF1;						/* 1st Bus Cycle */
	*pQDRStart = 0xD0;						/* 2nd Bus Cycle */

	/*==== Status Polling ====*/
	while((*pQDRStart & 0x80) != 0x80);		/* Status Data Confirmation */

	*pQDRStart = 0x50;						/* Clear Status */
	
	
	/*==== Program from Page Buffer to Flash ====*/
	
	/***** Output of Page Buffer to Flash Command *****/
	*pProgStart = 0x0E;						/* 1st Bus Cycle */
	*pProgStart = 0xD0;						/* 2nd Bus Cycle */

	/*==== Status Polling  ====*/
	while((*pProgStart & 0x80) != 0x80) ;	/* Status Data Confirmation */
			
	if ((*pProgStart & 0x38) != 0x00) {		/* Check of Error */
		Errflg = FALSE;						/* Set of Error Flag */
		*pProgStart = 0x50;					/* Clear Status */
	}

	*pProgStart = 0xff;						/* OUtput of Read Array Command */
	return Errflg;
}