unsigned char  AT45DBXX_STATUS(void)
{
    unsigned char temp;
    spi_cs(0);
 SPI_Send_Data(0Xd7);
    temp =  SPI_Send_Data(0Xff);
    spi_cs(1);
    return temp; //bit7 0=busy  bit6 1=Compare
                 // bit1 1=PROTECT bit0 0=528byte 1=512byte
}

unsigned char AT45XX_ID(void)
{
 unsigned char temp;
    spi_cs(0);
 SPI_Send_Data(0X9F);
 temp=SPI_Send_Data(0xff);
 temp=SPI_Send_Data(0xff);
 spi_cs(1);
    return temp;
}
void ContinuousArrayLowRead(unsigned int page,unsigned int addrs,
                            unsigned char *dat,unsigned int lenght)
{
    spi_cs(0);
 SPI_Send_Data(0X03);
    page<<=1;
    if(addrs&0x100)page=page+1;
 SPI_Send_Data((page>>8));
 SPI_Send_Data(page);
 SPI_Send_Data(addrs);
    while(lenght)
   {
  *dat = SPI_Send_Data(0Xff);
     dat++;
     lenght--;
   }
    spi_cs(1);
}
void Buffer1ToMainWithErase(unsigned int page)
{
    spi_cs(0);
 SPI_Send_Data(0X83);
 SPI_Send_Data((page>>7));
 SPI_Send_Data(page<<1);
 SPI_Send_Data(0x00);
    spi_cs(1);
}
void AT45Buffer1Write(unsigned int addrs,unsigned char *dat,unsigned int lenght)
{
    spi_cs(0);
 SPI_Send_Data(0X84);
 SPI_Send_Data(0x00);
 SPI_Send_Data(addrs>>8);
 SPI_Send_Data(addrs);
    while(lenght)
   {
   SPI_Send_Data(*dat);
     dat++;
     lenght--;
   }
    spi_cs(1);
}
void AT45Buffer1Read(unsigned int addrs,unsigned char *dat,unsigned int lenght)
{
    spi_cs(0);
 SPI_Send_Data(0Xd1);
 SPI_Send_Data(0x00);
 SPI_Send_Data(addrs>>8);
 SPI_Send_Data(addrs);
    while(lenght)
   {
   *dat = SPI_Send_Data(0xff);
     dat++;
     lenght--;
   }
    spi_cs(1);
}
void MainToBuffer1AT45(unsigned int page)
{
    spi_cs(0);
 SPI_Send_Data(0X53);
 SPI_Send_Data((page>>7));
 SPI_Send_Data(page<<1);
 SPI_Send_Data(0x00);
    spi_cs(1);
}
void Buffer2ToMainWithErase(unsigned int page)
{
    spi_cs(0);
 SPI_Send_Data(0X86);
 SPI_Send_Data((page>>7));
 SPI_Send_Data(page<<1);
 SPI_Send_Data(0x00);
    spi_cs(1);
}
void AT45Buffer2Write(unsigned int addrs,unsigned char *dat,unsigned int lenght)
{
    spi_cs(0);
 SPI_Send_Data(0X87);
 SPI_Send_Data(0x00);
 SPI_Send_Data(addrs>>8);
 SPI_Send_Data(addrs);
    while(lenght)
   {
   SPI_Send_Data(*dat);
     dat++;
     lenght--;
   }
    spi_cs(1);
}
void AT45Buffer2Read(unsigned int addrs,unsigned char *dat,unsigned int lenght)
{
    spi_cs(0);
 SPI_Send_Data(0Xd3);
 SPI_Send_Data(0x00);
 SPI_Send_Data(addrs>>8);
 SPI_Send_Data(addrs);
    while(lenght)
   {
   *dat = SPI_Send_Data(0xff);
     dat++;
     lenght--;
   }
    spi_cs(1);
}
void MainToBuffer2AT45(unsigned int page)
{
    spi_cs(0);
 SPI_Send_Data(0X55);
 SPI_Send_Data((page>>7));
 SPI_Send_Data(page<<1);
 SPI_Send_Data(0x00);
    spi_cs(1);
}
void ChipErase(void)
{
    spi_cs(0);
 SPI_Send_Data(0Xc7);
 SPI_Send_Data(0x94);
 SPI_Send_Data(0x80);
 SPI_Send_Data(0x9a);
    spi_cs(1);
}
void PowerOfPage256(void)
{
    spi_cs(0);
 SPI_Send_Data(0X3d);
 SPI_Send_Data(0x2a);
 SPI_Send_Data(0x80);
 SPI_Send_Data(0xa6);
    spi_cs(1);
}
void test_at45xx(void)
{
unsigned char status,i;
unsigned int n;
unsigned char rx_dat[153];
const unsigned char leab[10]={0x00,0x01,0x02,0x03,0x55,0xaa,0x88,0x99,0x88,0xaa};
status = AT45XX_ID();
SCI_Send_dat(status);
//ChipErase();
do{
status = AT45DBXX_STATUS();
SCI_Send_dat(status);
}while((status&0x80)==0);
ContinuousArrayLowRead(0,1, rx_dat,100);//0x03
for(i=0;i<100;i++){SCI_Send_dat(rx_dat[i]);rx_dat[i]=0;}
/*for(n=0;n<512;n++)
{
AT45Buffer1Write(n,&n,1);//0x84  0x87
status = AT45DBXX_STATUS();
//SCI_Send_dat(status);
while((status&0x80)==0);
}

AT45Buffer1Read(0x00,rx_dat,10);
for(i=0;i<10;i++){SCI_Send_dat(rx_dat[i]);rx_dat[i]=0;}
do{
status = AT45DBXX_STATUS();
SCI_Send_dat(status);
}
while((status&0x80)==0);
Buffer1ToMainWithErase(0);
do{
status = AT45DBXX_STATUS();
SCI_Send_dat(status);
}
while((status&0x80)==0);
MainToBuffer1AT45(0);//0x53
do{
status = AT45DBXX_STATUS();
SCI_Send_dat(status);
}
while((status&0x80)==0);
AT45Buffer1Read(0x00,rx_dat,150);
for(i=0;i<150;i++)SCI_Send_dat(rx_dat[i]);
*/
 
}

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