I2C память., Не могу работать с 24с256. Опции

[at90]

Прилепил к меге 24с256. Адресные ноги подтянуты к земле.
Но попытки чтения и записи в память не увенчались успехом.
Пишу в КодеВижен. Доэтого работал с ds1307. Работает нормально.

Использую встроенный в компилятор I2C.
#define EEPROM_BUS_ADDRESS 0xA0

bit i2c_error;

unsigned char at24c08_read(unsigned int address)
{
unsigned char data;
unsigned char temp_i;
temp_i = SREG.7;
#asm("cli")

i2c_error=0;
data = ((unsigned char)(address>>7))&0x0e;
if (!(i2c_start()&&
i2c_write(EEPROM_BUS_ADDRESS | data)&&
i2c_write((unsigned char)(address))&&
i2c_start()&&
i2c_write(EEPROM_BUS_ADDRESS | data | 1)))
{ i2c_error=1; }
else data=i2c_read(0);
i2c_stop();

SREG.7 = temp_i;
return data;
}



void at24c08_write(unsigned int address, unsigned char data)
{
unsigned char temp_i;
temp_i = SREG.7;
#asm("cli")
i2c_error=0;

if (!(i2c_start()&&
i2c_write(EEPROM_BUS_ADDRESS | (((unsigned char)(address>>7))&0x0e))&&
i2c_write((unsigned char)(address))&&
i2c_write(data))) { i2c_error=1; }
i2c_stop();

delay_ms(10);
SREG.7 = temp_i;
}

[at90]

organizatsija pamjaati u 2408 i 24256 raznoe, 256 trebujet 2 baitnöi adres, smotrii datasheet.
primerno
{
U8 i;
i =i2c_start();
i&=i2c_write(EEPROM_BUS_ADDRESS );
i&=i2c_write(address>>8);
i&=i2c_write( aaddress &0xFF);
if ( i==0) ... net ACK
else .. chip otvetshal ACK
}

Пробовал ещё так

Код

void write_byte_eeprom (unsigned int address, unsigned char data)
{
unsigned char sSREG;

sSREG = SREG; // ?aaeno? Noaoona IE

#asm ("cli")
i2c_start();
i2c_write(EEPROM_BUS_ADDRESS | ((unsigned char)(address>>8)<<1));
i2c_write((unsigned char)address);
i2c_write(data);
i2c_stop();

SREG = sSREG;
delay_ms(10);

}



unsigned char read_byte_eeprom (unsigned int address)
{
unsigned char data;
unsigned char sSREG;

sSREG = SREG;
#asm ("cli")
i2c_start();
i2c_write(EEPROM_BUS_ADDRESS | ((unsigned char)(address>>8)<<1));
i2c_write((unsigned char)address);
i2c_start();
i2c_write(EEPROM_BUS_ADDRESS | ((unsigned char)(address>>8)<<1) | 1);
data = i2c_read(0);
i2c_stop();
SREG = sSREG;
return data;
}

всё равно не пашет!