2440nand.c

GEC 2440 nand FLASH的开发 详细系统说明NAND FLASH开发

#include "2440addr.h"
#include "2440lib.h"
#include "def.h"
#include "nand.h"

#define NFBlcokAddr  0x3ffc000

void xmain(void)
{
	U16 ID,i;
	U8 buf[512];
	U32 NFBlockNO;
	U32 NFPagesNO = 31;
	U32 status;
	
	NFBlockNO = (NFBlcokAddr>>14);
		
	ChangeClockDivider(3,1);
	ChangeMPllValue(127,2,1);		//405MHZ
	
	Isr_Init();
	Uart_Init(0, 115200);
	Uart_Select(0);
	Uart_Printf("\nthe main is running\n");
	
	NF8_Init();
	ID=NF8_CheckId();//ID=EC76
	Uart_Printf("\nnand flash`s ID is:%x\n",ID);
	
    status = NF8_IsBadBlock(NFBlockNO);
 	if(status == TRUE)    Uart_Printf("\nblock good OK.\n");
	else    Uart_Printf("\nblock bad.\n"); 
	  
    if(NF8_EraseBlock(NFBlockNO))
  	{	
  		Uart_Printf("\nblock %d is erased\n",NFBlockNO);
  		for(i=0; i<512; i++)
			{
			    buf[i] = i;
			    Uart_Printf("%4x", buf[i]);	
			}
		Uart_Printf("\nWrite data[%d block, %d page].\n", NFBlockNO,NFPagesNO);
	    status = NF8_WritePage(NFBlockNO,NFPagesNO,buf);	
	    
	    if(status == TRUE)    Uart_Printf("\nWrite OK.\n");
	    else    Uart_Printf("\nWrite Error.\n");
	    	
	    for(i=0; i<512; i++)
		    buf[i] = 0;
	    
	    NF8_ReadPage(NFBlockNO,NFPagesNO,buf);
	    Uart_Printf("\nRead data[%d block, %d page].\n", NFBlockNO,NFPagesNO);
	    for(i=0; i<512; i++)
		    Uart_Printf("%4x", buf[i]);
        while(1);
    }

	Uart_Printf("\nblock %4x erased is bad\n",NFBlockNO);
}