sst39lf160.c

三星S3C44B0X的一个DEMO代码,实现LCD显示时钟运行.

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


int SST39LF160_ProgFlash(U32 realAddr,U16 data);
void SST39LF160_EraseSector(U32 Sector);
void SST39LF160_EraseBlock(U32 Block);
void SST39LF160_EraseChip(void);
int SST39LF160_CheckId(void);
int SST39LF160BlankCheck(U32 Addr, U32 Size);
static int _WAIT(void);
extern void Led_Display(int LedStatus);

#define _WR(addr,data)	*((U16 *)(addr<<1))=(U16)data	//the addr should be shifted
#define _RD(addr)	( *((U16 *)(addr<<1)) )	
#define _RESET()	_WR(0x0,0xf0)		
#define BADDR2WADDR(addr)   (addr/*>>1*/)			

#define WordsPerSector (2048)              //2Kwords 
#define BytesPerSector (WordsPerSector*2)  //4Kbytes
#define BytesPerBlock  (BytesPerSector*16) //64Kbytes
#define srcAddress 0xc100000
#define Block2BeWritten 512  //480

void ProgramSST39LF160(void)
{
    U32 targetAddress;
    U32 i;

    targetAddress = BytesPerSector * 256;//=0x100000:4Kbytes=4096 *256;
    Uart_Printf("\nErase the sector:0x%x.\n",targetAddress);

    for(i=16; i<32; i++) 
       SST39LF160_EraseBlock(i);

    if(!SST39LF160BlankCheck(targetAddress, BytesPerSector * 256))
      {
	    Uart_Printf("After SST39LF160_EraseChip(), Blank Check Error!!!\n");
      }
   
    Uart_Printf("\nStart of the data writing.\n");

    for(i=0;i<0x90000;i+=2) 
    {
        SST39LF160_ProgFlash(  i+targetAddress, * ((U16*)(srcAddress+i) ) );
		if ((i % 0x1000)==0) Uart_Printf("%x  4K is being written!\n",i / 0x1000);
    }

    Uart_Printf("\nEnd of the data writing!!!\n");

    _RESET();

    Uart_Printf("\nVerifying Start.\n");
    for(i=0;i<0x90000;i+=2) 
    {
        if(*( (U16 *)(i+targetAddress) ) != (U16)* ((U16*)(srcAddress+i) )   )
	    {    
	        Uart_Printf("%x=verify error\n",i+targetAddress);
            break;
	    }

        if((i%0x1000)==0)    Uart_Printf("%x  4K is ok!\n ",i / 0x1000);
    }

    Uart_Printf("\nVerifying End!!!\n");

	Led_Display(0x1);
	Beep(0x0fff);
	Led_Display(0);

}

int SST39LF160_CheckId(void)
{
    U16 manId,devId;

    _RESET();
    
    _WR(0x555,0xaaaa);
    _WR(0x2aa,0x5555);
    _WR(0x555,0x9090);
    manId=_RD(0x0);

    _WR(0x555,0xaaaa);
    _WR(0x2aa,0x5555);
    _WR(0x555,0x9090);
    devId=_RD(0x1);

    _RESET();   

    Uart_Printf("Manufacture ID=%4x(0x0001), Device ID(0x225B)=%4x\n",manId,devId);

    if(manId==0x0001 && devId==0x225b)
	   return 1;
    else 
	   return 0;
}

void SST39LF160_EraseSector(U32 Sector)
{
        Uart_Printf("%x Sector Erase is started!\n",Sector);
        
        Sector = BADDR2WADDR( Sector<<11 );

        _RESET();

        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(0x5555,0x80);
        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(Sector,0x30);//送高位A12-A20地址
        _WAIT();
        _RESET();
}


void SST39LF160_EraseBlock(U32 Block)
{
        Uart_Printf("Block Erase is started!\n");
        
        Block = BADDR2WADDR( Block<<15 );

        _RESET();

        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(0x5555,0x80);
        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(Block, 0x50);  //送高位A16-A20地址
        _WAIT();
        _RESET();
}

void SST39LF160_EraseChip(void){

        Uart_Printf("Chip Erase is started!\n");
        
        _RESET();

        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(0x5555,0x80);
        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(0x5555,0x10);
        _WAIT();
        _RESET();
}

int SST39LF160BlankCheck(U32 Addr, U32 Size)
{
    U32 i,j;
    for(i=0;i<Size;i+=2)
    {
	    j=*((U16 *)(i+Addr));
	    if( j!=0xffff)
	    {
			Led_Display(0x1);
	        Uart_Printf("Blank Check Error:%x=%x\n",(i + Addr),j);
	        return 0;
	    }
    }
    return 1;
}


static 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;
	    old=flashStatus;
    }
    return 1;
}




int SST39LF160_ProgFlash(U32 realAddr,U16 data)
{
	volatile U16 *tempPt;
        tempPt=(volatile U16 *)realAddr;
        _WR(0x5555,0xaa);
        _WR(0x2aaa,0x55);
        _WR(0x5555,0xa0);
        *tempPt=data;
        
    Delay(1);
	return 1;
}