at29c010a.c

此为AT29C010A的51单片机读写代码 电路中AT29C010A扩展地址为用138加373用常规方式进行扩展。

#include<reg51.h>
#include<absacc.h>

#define CsOut29Add XBYTE[0X3FFF]
#define CsOutPort  XBYTE[0X5FFF]

#define test XBYTE[0XFFFF]



void delay(unsigned int times)
{
    unsigned int i;
	unsigned char j;
	for(i=0;i<times;i++)
	    for(j=0;j<55;j++)
		   test=0x00;
}

void BeepLight(void)
{
    unsigned int i;
    for(i=0;i<5;i++)
	{
	    CsOutPort=0x00;
	    delay(100);
	    CsOutPort=0x1c;
	    delay(100);
	}
}

unsigned char ReadMemory(unsigned int sector,unsigned char AddressOfSector)
{
    unsigned char AddAddress;
	unsigned int  xdata *MemoryAddress;

    union UnionAddress
	{
	    unsigned int word;
		struct StructTwoByte
		{ 
		    unsigned char byte1;
			unsigned char byte2;
		}StructTwoByte1;
	}UnionAddress1;
    MemoryAddress=0x0000;
    AddAddress=(unsigned char)sector>>6;
	UnionAddress1.StructTwoByte1.byte1=((unsigned char)sector&0x3f);
	UnionAddress1.StructTwoByte1.byte2=AddressOfSector<<1;
    UnionAddress1.word=UnionAddress1.word>>1;

	CsOut29Add=AddAddress;
	MemoryAddress=UnionAddress1.word;
	return(*MemoryAddress);
}

void WriteMemory(unsigned int sector,unsigned char AddressOfSector,unsigned char value)
{
    unsigned char AddAddress;
	unsigned int  xdata *MemoryAddress;

    union UnionAddress
	{
	    unsigned int word;
		struct StructTwoByte
		{ 
		    unsigned char byte1;
			unsigned char byte2;
		}StructTwoByte1;
	}UnionAddress1;
    MemoryAddress=0x0000;
    AddAddress=(unsigned char)sector>>6;
	UnionAddress1.StructTwoByte1.byte1=((unsigned char)sector&0x3f);
	UnionAddress1.StructTwoByte1.byte2=AddressOfSector<<1;
    UnionAddress1.word=UnionAddress1.word>>1;
    
	CsOut29Add=AddAddress;
	MemoryAddress=UnionAddress1.word;                                                                                              UnionAddress1.word;
    *MemoryAddress=value;
}



void ReadMemorySequence(unsigned int sector,unsigned char *databuf,unsigned long number)
{
    unsigned int i;
	unsigned char j;
	unsigned char WriteNumber;
    unsigned int PageCount;
	unsigned char RemainCount;
	unsigned char AddAddressOfSector;
	unsigned int  xdata *MemoryAddress;
	unsigned int  address;
    
    WriteNumber=0;
    PageCount=(unsigned int)(number/0xff);
    RemainCount=(unsigned char)(number%0xff);
    for(i=0;i<PageCount;i++)
	{
	    sector+=i;
	    AddAddressOfSector=(unsigned char)(sector>>6);
	    address=(sector&0x003f)<<0x07;
		MemoryAddress=address;
		CsOut29Add=AddAddressOfSector;
	    for(j=0;j<0x8f;j++)
  	    {
            databuf[WriteNumber++]=*(MemoryAddress+j); 	    
		}
        delay(15);
	}
    sector++;
	AddAddressOfSector=(unsigned char)(sector>>6);
	address=(sector&0x003f)<<0x07;
    MemoryAddress=address;
	CsOut29Add=AddAddressOfSector;
	for(j=0;j<RemainCount;j++)
  	{
        databuf[WriteNumber++]=*(MemoryAddress+j); 	    
	}
	
}

void WriteMemorySequence(unsigned int sector,unsigned char *databuf,unsigned long number)
{
    unsigned int i;
	unsigned char j;
	unsigned char WriteNumber;
    unsigned int PageCount;
	unsigned char RemainCount;
	unsigned char AddAddressOfSector;
	unsigned int  xdata *MemoryAddress;
	unsigned int  address;
    
    WriteNumber=0;
    PageCount=(unsigned int)(number/0xff);
    RemainCount=(unsigned char)(number%0xff);
    for(i=0;i<PageCount;i++)
	{
	    sector+=i;
	    AddAddressOfSector=(unsigned char)(sector>>6);
	    address=(sector&0x003f)<<0x07;
		MemoryAddress=address;
		CsOut29Add=AddAddressOfSector;
	    for(j=0;j<0x8f;j++)
  	    {
            *(MemoryAddress+j)=databuf[WriteNumber++]; 	    
		}
	}
    sector++;
	AddAddressOfSector=(unsigned char)(sector>>6);
	address=(sector&0x003f)<<0x07;
    MemoryAddress=address;
	CsOut29Add=AddAddressOfSector;
	for(j=0;j<RemainCount;j++)
  	{
        *(MemoryAddress+j)=databuf[WriteNumber++]; 	    
	}
	
}



void main(void)
{   /*
    unsigned char result;
    unsigned char i=1;
	unsigned char datavalue=0x55;
    BeepLight();
	WriteMemory(0xff,i,datavalue);
	delay(5000);
	result=ReadMemory(0xff,i);
    if(result==datavalue)
	{
	   BeepLight();
    }
    delay(5000);
	*/
    //unsigned char i;
    unsigned char  code DataBuf[10]={0x13,0x57,0x91,0x24,0x68,0x13,0x57,0x91,0x24,0x68};
    unsigned char data ReadBuf[10];
    WriteMemorySequence(0xfe,DataBuf,10);
    delay(15);
	
	ReadMemorySequence(0xfe,ReadBuf,10);
    BeepLight();


    while(1);
}