sst39vf160.c

flash烧写程序

//#include "44b.h"
//#include "44blib.h"
#include "def.h"

#define rPCONB		(*(volatile unsigned *)0x1d20008)
#define rPDATB		(*(volatile unsigned *)0x1d2000c)

int SST39VF160_ProgFlash(U32 realAddr,U16 data);
void SST39VF160_EraseSector(int targetAddr);
void SST39VF160_EraseBlock(int targetAddr);
void SST39VF160_EraseChip(void);
int SST39VF160_CheckId(void);
int SST39VF160(int targetAddr,int targetSize);
int _WAIT(void);
int BlankCheck(int targetAddr,int targetSize);
static void InputTargetAddr(void);

// Because S3C44B0X is connected to SST39VF160,
// the addr parameter has to be a WORD address, so called in AMD specification.

#define _WR(addr,data)	 *((U16 *)(addr<<1))=(U16)data	//the addr should be shifted
#define _RD(addr)	 *((U16 *)(addr<<1))
#define _RESET()	_WR(0x0,0xf0f0)		
#define BADDR2WADDR(addr)   (addr>>1)			

U32 srcAddress;
U32 srcOffset;
U32 targetAddress;
U32 targetSize;


void ProgramSST39VF160(void)
{
    int i;

    rPCONB = 0x1cf; 
    rPDATB = 0xffff;
    
    InputTargetAddr();
    srcAddress=0xc200000;
    
  
    if(!SST39VF160_CheckId())
    {
	
	return;
    }
    
    SST39VF160_EraseChip();
    /*for(i=0;i<targetSize/65535+1;i++)
    {
     
     SST39VF160_EraseBlock(targetAddress+i*65535);
     
     }*/
    
    if(!BlankCheck(targetAddress,targetSize))
    {
	
	return;
    }

    
    for(i=0;i<targetSize;i+=2) 
    {
        SST39VF160_ProgFlash(  i+targetAddress,*( (U16 *)(srcAddress+srcOffset+i) )  );
   
    }

   

  
    for(i=0x0;i<targetSize;i+=2) 
    {
        if(*( (U16 *)(i+targetAddress) )!=*( (U16 *)(srcAddress+srcOffset+i) )  )
	{    
	
	    return;
	}
    
    }
  
	//ProgramSST39VF160();
	rPDATB=0x0;

}



static void InputTargetAddr(void)
{
   
   
    targetAddress=0x0;
    srcOffset=0x0;
    targetSize=0x10000;
    
   
}




int SST39VF160_CheckId(void)
{
    U16 manId,devId;

   
    
    _WR(0x5555,0xaaaa);
    _WR(0x2aaa,0x5555);
    _WR(0x5555,0x9090);
    manId=_RD(0x0);

    _WR(0x5555,0xaaaa);
    _WR(0x2aaa,0x5555);
    _WR(0x5555,0x9090);
    devId=_RD(0x1);
    _RESET();
   


    if(manId==0x00bf && devId==0x2782)
	return 1;
    else 
	return 0;
}




void SST39VF160_EraseSector(int targetAddr)
{
       

       

        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(0x5555,0x8080);
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(BADDR2WADDR(targetAddr),0x3030);
        _WAIT();
        
}

void SST39VF160_EraseBlock(int targetAddr)
{
       

       
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(0x5555,0x8080);
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(BADDR2WADDR(targetAddr),0x5050);
        _WAIT();
       
}

void SST39VF160_EraseChip(void)
{
        
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(0x5555,0x8080);
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(0x5555,0x1010);
        _WAIT();
 
 }


int BlankCheck(int targetAddr,int targetSize)
{
    int i,j;
    for(i=0;i<targetSize;i+=2)
    {
	j=*((U16 *)(i+targetAddr));
	if( j!=0xffff)
	{
	
	    return 0;
	}
    }
    return 1;
}




int _WAIT(void) //Check if the bit6 toggle ends.
{
    volatile U16 flashStatus,old;

    old=*((volatile U16 *)0x0);

    while(1)
    {
	flashStatus=*((volatile U16 *)0x0);
	if( (old&0x40) == (flashStatus&0x40) )
	    break;
	if( flashStatus&0x20 )	
	{
	   
	    old=*((volatile U16 *)0x0);
	    flashStatus=*((volatile U16 *)0x0);
	    if( (old&0x40) == (flashStatus&0x40) )
		return 1;  
	    else 
		return 0;  
	}

	old=flashStatus;
    }
   
    return 1;
}




int SST39VF160_ProgFlash(U32 realAddr,U16 data)
{
	volatile U16 *tempPt;
       // int temp,count=0;
        tempPt=(volatile U16 *)realAddr;
        _WR(0x5555,0xaaaa);
        _WR(0x2aaa,0x5555);
        _WR(0x5555,0xa0a0);
        *tempPt=data;
        
	return _WAIT();
/*        while(1)
	{
	    temp=*tempPt;
            if(temp==data || count==100)break;
	    if(temp&0x20)
	    {
		count++;
	    }
        }
        if(count>0)Uart_Printf("Time out is occurred at %x\n",realAddress);
*/
}