untitled1.c

msp430单片机的flash的不同用法的编程

/*
//--------------------------------------------------------------------------------------
//写入的数据少于512个并且不跨页

void Flash_replaceArray1(uchar *ptr, uchar *data,int num)
{
uchar *read_ptr;
uchar *write_ptr;
int *iread_ptr;
int *iwrite_ptr;
int fptr=(int)ptr & 0xfe00;
int i;
  
Flash_clr((int *) FSEG_BAK);

//Set to write mode to prepare for copy
FCTL3 = FWKEY;          // Lock = 0 

FCTL1 = FWKEY+WRT;         // WRT = 1 

//Copy block B to A

iread_ptr = (int *) fptr;
iwrite_ptr = (int *) FSEG_BAK;
	for (i = 0;  i < 256;  i++)
	{
	*iwrite_ptr++ = *iread_ptr++;
	}
Flash_clr((int *) fptr);

//Set to write mode to prepare for copy
FCTL3 = FWKEY;          // Lock = 0 
FCTL1 = FWKEY+WRT;          // WRT = 1 

//Copy block A to B, slipping in the new value at the right location
(int *)read_ptr = (int *) FSEG_BAK;
(int *)write_ptr = (int *) fptr;
fptr = (int)ptr+num;
	for (i = 0;  i < 512;  i++, read_ptr++, write_ptr++)
	{
		if ((write_ptr >= ptr) && (write_ptr < (uchar *)fptr))
		{
		*write_ptr = *data;
		data++;
		}
		else
		*write_ptr = *read_ptr;
	}
Flash_secure();
}

//--------------------------------------------------------------------------------------
//写入的数据任意个、可以跨页
void Flash_replaceArray(unsigned char *ptr, unsigned char *data,int num)
{
unsigned int 	loopnum,offset,page,i,num1,address;
unsigned int  	base,npage,start;

address=(int)ptr;
num1=(int)ptr+num;
page=511;
base=address & (~page);
offset=address & page;
page++;
loopnum=(offset+num-1)/page;
	for(i=0;i<=loopnum;i++)
	{
	npage=i*page;
		if (i==0)
		{
			if (loopnum>=1) num1=page-offset;
			else 	num1=num;
		start=0;
		}
		else if(i==loopnum)
		{
		address=base;
		start=npage-offset;
		num1=num+offset-npage;
		}
		else 
		{
		address=base;
		start=npage-offset;
		num1=page;
		}
	Flash_replaceArray1((unsigned char *)address,(unsigned char*)((int)data+start),num1);
	base+=page;
	}
}
*/