flash.c.bak

uboot底层驱动

typedef unsigned short  		U16;     /* unsigned 16-bit integer */
typedef unsigned char   		U8;     /* unsigned 8-bit integer */
typedef unsigned long   		U32;     /* unsigned 32-bit integer */


typedef	volatile U16 *			RP16;
typedef int						ER;

typedef	volatile unsigned short *	POINTER;

typedef	volatile U8  *			RP8;
#define	YES						1		
#define	NO						0		/* 3?′í·μ???μ */
#define E_OK          1

#define     WordLen         2                      //32??Norflash?á?3?è
#define		ERASEBLOCKSIZE		0x2000					  /* 8Kbye:?????2¨￠3y|ì???¨?D??ê??¨′?Yflash?á¨o¨￠?|ì?|ì??ê?2??¨|??¨°a?à???￥ */	

/***************************************************************************************************************************
 *filename:			HA_EMI.C		
 *author:			wuer
 *create date:		2005-5-10 12:45                                                                      
 *description:	    	The file consists of some functions of Nor Flash                                             
 *modify history:	                                                                      
 *misc:           	òò?aD????a16??￡?1ê?ùóD??D???μ?￡??üá?2ù×÷??ê?16??2ù×÷?￡
 ****************************************************************************************************************************/
#include "HA_TypeDef.h"
#include <stdio.h>

ER NorFlash_clearSR(void)
{
	*(RP16)0x20000000 = 0x50;
	return YES;
}

ER NorFlash_idlejud(U32 address)
{
	U16 temp = 0;
	
	*(RP16)address = 0x70;
	temp = *(RP16)address;
	while( (temp & 0x80) != 0x80 )
	{
		temp = *(RP16)address ;
	}
	
	*(RP16)address = 0xff;
	
	return YES;
}
	
	
ER NorFlash_Normal(U32 address)
{
	*(RP16)address = 0xff;

	return YES;
}




ER NorFlash_bolckerase(U32 blockadd)
{
	U16 temp;
	
	*(RP16)blockadd = 0x20;
	*(RP16)blockadd = 0xd0;
	
	temp = NorFlash_idlejud(blockadd);
	
	temp = NorFlash_clearSR( );			       
	return YES;
}

ER NorFlash_Chiperase(void)
{
	U32 anyaddress = 0x20000000;
	
	*(RP16)anyaddress = 0x30;
	*(RP16)anyaddress = 0xd0;
	
	
	NorFlash_idlejud(anyaddress);
	
	NorFlash_clearSR();			      
	return YES;
}

ER NorFlash_read( U32 address)
{
	U16 i;
	
	*(RP16)address = 0xff;	
	i = *(RP16)address;
	
	NorFlash_idlejud(address);
	
	return i;
}


ER NorFlash_unlock( U32 address)
{
	
	
	*(RP16)address = 0x60;
	*(RP16)address = 0xd0;
	
	
	NorFlash_idlejud(address);
	
	return YES;
}


ER NorFlash_lock( U32 address)
{
	*(RP16)address = 0x60;
	*(RP16)address = 0x01;
	
	
	NorFlash_idlejud(address);
	
	return YES;
}


ER NorFlash_write( U32 address, U16 data )
{
	U16 temp;
		
	*(RP16)address = 0x40;
	*(RP16)address = data;
	
	NorFlash_idlejud(address);
	
	temp = NorFlash_read(address);
	
	if(temp != data) 
		printf("write error!original data is 0x%x and data read out is 0x%x!!\n",(U16)temp,(U16)data);
	
	return YES;
}


ER check(U32 head1, U32 head2, U32 num)
{
	RP8 p1, p2;
	char data;
	
	p1 = (RP8)head1;
	p2 = (RP8)head2;
	
	
	while(num-->0)
	{
		data = *((RP8)p1++);
		
		if(data!= *((RP8)p2++))
		{
			printf("the copyed data is not the orignal one!!\n");
			return NO;
		}
	}
	
	return YES;
}