nflashwr.c

DSP+MP3+USB+FAT12的所有源程序(C语言编写)

#include "general.h"
/*++

Copyright (c) 2004 GoldInfo Technology Co., Ltd.

Module Name:

       NFlashWR.c

Abstract:

        Module related to Nand Flash operation

Environment:

        ccs2.0 IDE

Revision History:

        02/3/20014      Mikal   created

--*/
//*****************************************************************************

volatile USHORT *GPIOCR = (volatile USHORT *) 0x003c;
volatile USHORT *GPIOSR = (volatile USHORT *) 0x003d;

USHORT  G_NFlash_DataBuff[512*9];

USHORT ID_DATA1,ID_DATA2;
USHORT G_NFlash_WR_Es_Flag=0 ;  // 0 is sucessfule

ioport unsigned port5ffc;

//*****************************************************************************
/*++

Routine Description:

        process DSP GPIO port  and HPI interface  

Arguments:

        none

Return Value:

        none

--*/
void Init_GPIO(void)
{
    *GPIOCR = 0x40;            /* Set GPIO6 as output */
    
    *GPIOSR = 0x00;
}


//*****************************************************************************
/*++

Routine Description:

        process DSP GPIO port  and HPI interface  

Arguments:

        none

Return Value:

        none

--*/
void Init_GPIO_Disable(void)
{
               
    
    *GPIOSR = 0x40;  // set GPIO6 is high output
}




//*****************************************************************************
/*++

Routine Description:

        process The control function for reading  the nand-flash data 

Arguments:

        none

Return Value:

        none

--*/
USHORT Nand_Read_Data(void)
{
     USHORT  i  ;
       
     NFlashReadData();
       
     i = G_NFlashData ;
    // i=port5ffc;
    return(i);
 



}


//*****************************************************************************
/*++

Routine Description:

        process Read Nand Flash Identify  

Arguments:

        none

Return Value:

        none

--*/
void Read_Nand_Flash_ID(void)
{  
   

 	Init_GPIO();					/*GPIO6=CE=0*/      
  
    NandWrite_SET_CLE(0x90);                /* resd nand_id */ 
  
  
    NandWrite_SET_ALE(0); 
      
  
    ID_DATA1 = Nand_Read_Data(); // the first byte is marker code
  
    ID_DATA2 = Nand_Read_Data();  //The sencod byte is ID  
 	

   
 
}



//*****************************************************************************
/*++

Routine Description:

        process Write the nand-flash data

Arguments:

        none

Return Value:

        none

--*/
void Write_NFlash_Sector(ULONG WR_NFlash_PhySector,USHORT WR_Datalen,PUSHORT WR_DataBuffer,USHORT wFlag)
{
    USHORT  j,k;
	ULONG NFlashPhySector;
	
	
	NFlashPhySector = WR_NFlash_PhySector & 0x0FFFFL;  //1fffff=64kpage=2048blockx32page/block
    Init_GPIO();

	NandWrite_SET_CLE(0x80);                // Page Program 
	
	NandWrite_SET_ALE(0);                           // A0-A7 
	NandWrite_SET_ALE(NFlashPhySector & 0xFF);      // A9-A16      
	NandWrite_SET_ALE((NFlashPhySector>>8)&0xFF);   // A17-A24      
	     
   if (wFlag==0x00)
   {
   	  for(j=0; j<WR_Datalen; j++)
	  {
		k= WR_DataBuffer[j]&0x00ff;	
		Nand_Write_Data(k);
		                 
	  }
   }	
    
   else if (wFlag==0x01)
   {
      for(j=0; j<WR_Datalen; j++)
	  {
		k= WR_DataBuffer[0]&0x00ff;	
		Nand_Write_Data(k);
		                
	  }
    
   }
  
	NandWrite_SET_CLE(0x10);                

	AtaBusyStatusCheck();
	NandWrite_SET_CLE(0x70);                
	

	if(Nand_Read_Data() & 0x0001)
	{
		G_NFlash_WR_Es_Flag=1;  			
		
		return ;
		
	}                             
 
   G_NFlash_WR_Es_Flag=0;
 
}




//*****************************************************************************
/*++

Routine Description:

        process read the nand-flash page  data

Arguments:

        none

Return Value:

        none

--*/
void Read_NFlash_Sector(ULONG RD_NFlash_PhySector,USHORT RD_Datalen,PUSHORT RD_DataBuffer,USHORT wFlag)
{
    USHORT i,k;
			     
   
    ULONG NFlash_PhySector;  
    
   

	NFlash_PhySector = RD_NFlash_PhySector & 0x0FFFFL;   //1fffff=128kpage=2048blockx32page/block

	Init_GPIO();          //GPIO6=CE=0 
  
    if (wFlag==0x00)
    {     
      NandWrite_SET_CLE(0x0); 
    }  
    
    else if (wFlag==0x01)
    {
      NandWrite_SET_CLE(0x01);
      
    }
        
                         // read nand_id 
    NandWrite_SET_ALE(0);                            // A0-A7 
    NandWrite_SET_ALE(NFlash_PhySector & 0xFF);      // A9-A16     
    NandWrite_SET_ALE((NFlash_PhySector>>8)&0xFF);   // A17-A24      
    

  
   AtaBusyStatusCheck(); 
   
   for(i=0; i<20000; i++)
   {
     for(k=0; k<2; k++)
      i=i+1;
   }

  	  for(i=0; i<RD_Datalen; i++)
      {
      
      
    	  RD_DataBuffer[i]=  Nand_Read_Data() ;
		  
         // RD_DataBuffer[i]  = k | (~Nand_Read_Data() & 0xff);
         // RD_DataBuffer[i] = k;
          
 	  }
	


}




//*****************************************************************************
/*++

Routine Description:

        process erase the nand flash

Arguments:

        none

Return Value:

        none

--*/
void Erase_NFlash(ULONG lfy_PhySector) 
{
  	ULONG NandPhySector; 
  
	NandPhySector = lfy_PhySector & 0x0FFFFL;   /*1fffff=128kpage=2048blockx32page/block*/
  
    Init_GPIO();          //GPIO6=CE=0 

  	NandWrite_SET_CLE(0x60);                // resd nand_id 
  	NandWrite_SET_ALE(NandPhySector & 0xFF);      // A9-A16      
  	NandWrite_SET_ALE((NandPhySector>>8)&0xFF); // A17-A24      
   
 
	NandWrite_SET_CLE(0xd0);                /* Erase block commit */
  
  	AtaBusyStatusCheck(); 

  	NandWrite_SET_CLE(0x70);                /* Erase block commit */
  		
  
  	if(Nand_Read_Data() & 0x0001)
  	{
       G_NFlash_WR_Es_Flag=1;
	   
	   return ;
    
  	}  
  	
    G_NFlash_WR_Es_Flag=0;
  
}