flash.c

矿工定位系统单端

#include "REG51F.H"
#include "flash.h"
#include "string.h"
#include "stdio.h"
#include "intrins.h"




/***********************************************************************
* Function name : Flash_Sector_Erase                                    *
* Input		: unsigned char, (Sector number selected)	        						*
* Output 	: bit, (0->operation fail, 1->operation successful)     			*	 	
* Description   : This function will perform a sector erase on the 			*
*		  sector number (sec_no) of the selected (CS) flash  								*
*   		  memory device. 1 sector is 64Kbytes The operation will				*
*		  roughly take 2 seconds for 1 sector. All paging to the						*
*		  CPLD is done in this function.																		*
* Caution! 	; Do not perform this operation on program flash memory 		*
*		  while running program on the program flash.												*    		
************************************************************************/
bit Flash_Sector_Erase (unsigned char data sec_no)
{  
 
   unsigned int  data addr;
   addr=(unsigned int )sec_no*512;
   ISPFD=0X55;
   ISPFD=0XAA;
   ISPFD=0X55;
   SCONF=0X04;  //OPEN ISP
   ISPFAH=(addr&0xFF00)>>8;
   ISPFAL=addr&0x00ff;
   ISPC=0XA2;

return 1;

}
/************************************************************************
* Function name : Flash_Write		                                				*
* Input		: union ADDRESS, (32bit address location)	        						*
*		  unsigned char, (Data to be written																*
* Output 	: bit, (0->operation fail, 1->operation successful)     			*	 	
* Description   : This function will perform a prgramming on the 				*
*		  selected (CS) flash memory device. 1 byte of data is  						*
*		  being written to the location (Address). All paging to						*
* 		  the CPLD is done in this function.															*
* Caution! 	; Make sure the location to be program is eraseed (0xFF)		*
*		  before calling this function																			*  
*		  Do not perform this operation on program flash memory 						*
*		  while running program on the program flash.												*    		
************************************************************************/
bit Flash_Write (unsigned int Address, unsigned char data *_data,unsigned char data len)
{
   unsigned char data i;
     
   ISPFD=0X55;
   ISPFD=0XAA;
   ISPFD=0X55;
   SCONF=0X04;  //OPEN ISP	
      ISPFAH=Address>>8;
   ISPFAL= Address;
   ISPFD=*_data;
   ISPC=0XA0;
    for(i=0;i<len;i++)
	{
	   ISPFAH=Address>>8;
       ISPFAL= Address;
       ISPFD=*_data;
       ISPC=0XA0;
       Address++;
       _data++;
	}

		return 1;
}