writing ibutton DS1971 memory

Other Hardware Storage
1

I'm trying to use ibutton DS1971 for my school project. My first purpose is writing something to ibutton's EEPROM. (For e.g write FFFFFFFFFFFFF.... etc.) but i can't handle it. May i do it with your library?

Regards.

My code is reading from memory but cant change it:

#include <OneWire.h>

OneWire ds(2); // 1-wire on pin 2
byte addr[8]; // Contains the eeprom unique ID
void setup(void)
{
Serial.begin(9600);
}

void loop(void)
{
byte i;
byte dat[13];

SearchAddress(addr);

dat[0] = 0x01;
dat[1] = 0x02;
dat[2] = 0x03;
dat[3] = 0x04;
dat[4] = 0x05;
dat[5] = 0x06;
dat[6] = 0x07;
dat[7] = 0x08;

WriteRow(0,dat);
ReadAllMem(); //print all mem content

while(1);
}

void SearchAddress(byte* address) //Search for address and confirm it
{
int i;
if ( !ds.search(address))
{
Serial.print("No device found.\n");
ds.reset_search();
delay(250);
return;
}

Serial.print("ADDR= ");
for( i = 0; i < 8; i++)
{
Serial.print(address*, HEX);*

  • Serial.print(" ");*
    }
    if ( OneWire::crc8( address, 7) != address[7])
    {
  • Serial.print("CRC is not valid, address is corrupted\n");*
  • return;*
    }

if ( address[0] != 0x2D)

  • {*
  • Serial.print("Device is not a 1-wire Eeprom.\n");*
  • return;*
    }
    Serial.println();
    }
    void WriteReadScratchPad(byte TA1, byte TA2, byte* data)
    {
    int i;
    ds.reset();
    ds.select(addr);
    ds.write(0x0F,1); // Write ScratchPad
    ds.write(TA1,1);
  • ds.write(TA2,1);*
  • for ( i = 0; i < 8; i++)*
    _ ds.write(data*,1); *_

ds.reset();
*ds.select(addr); *
ds.write(0xAA); // Read Scratchpad

*for ( i = 0; i < 13; i++) *
_ data = ds.read();
}
void CopyScratchPad(byte* data)
{
ds.reset();
ds.select(addr);
ds.write(0x55,1); // Copy ScratchPad
ds.write(data[0],1);
* ds.write(data[1],1); // Send TA1 TA2 and ES for copy authorization*
ds.write(data[2],1);
* delay(25); // Waiting for copy completion*
//Serial.print("Copy done!\n");
}
void ReadAllMem()
{
int i;
ds.reset();
ds.select(addr);
ds.write(0xF0,1); // Read Memory
ds.write(0x00,1); //Read Offset 0000h
ds.write(0x00,1);_

for ( i = 0; i < 128; i++) //whole mem is 144
* {*
* Serial.print(ds.read(), HEX);*
* //Serial.print(" ");*
}
Serial.println();
}
void WriteRow(byte row, byte* buffer)
{
int i;
if (row < 0 || row > 15) //There are 16 row of 8 bytes in the main memory
* return; //The remaining are for the 64 bits register page*

WriteReadScratchPad(row*8, 0x00, buffer);

/* Print result of the ReadScratchPad
for ( i = 0; i < 13; i++)
* {*
_ Serial.print(buffer*, HEX);
Serial.print(" ");
}
/
CopyScratchPad(buffer);_

}