#include <avr/io.h>
#include<util/twi.h>

int main(void)
{
    uint8_t SLAVEADRW = 0xA0;
    uint8_t SLAVEADRR = 0xA1;
    uint8_t TWBR_V = 72;
    uint8_t START = 0x08;
    uint8_t MT_SLA_ACK = 0x18;
    uint8_t MT_DATA_ACK = 0x28;
    uint8_t wert;
    DDRD = 0b11111111;
    PORTD = 0x00;
    DDRC &= (1<<DDC0)|(1<<DDC1);
    
    TWBR = TWBR_V;

    TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);

    while(!(TWCR&(1<<TWINT)))
    ;

    if((TWSR & 0xF8) != START)
    PORTD= TWSR;

    TWDR = SLAVEADRW;
    TWCR =(1<<TWINT)|(1<<TWEN);
    while(!(TWCR&(1<<TWINT)));
    if((TWSR & 0xF8) != MT_SLA_ACK)
    PORTD= TWSR;

    TWDR = 0;
    TWCR =(1<<TWINT)|(1<<TWEN);
    while(!(TWCR&(1<<TWINT)));
    if((TWSR & 0xF8) != MT_DATA_ACK)
    PORTD= TWSR;
    PORTD= TWSR;

    TWDR = 0x2F;
    TWCR =(1<<TWINT)|(1<<TWEN);
    while(!(TWCR&(1<<TWINT)));
    if((TWSR & 0xF8) != MT_DATA_ACK)
    PORTD= TWSR;

    PORTD= TWSR;
    TWCR = (1<<TWINT)|(1<<TWSTO)|(1<<TWEN);



    TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);
    while(!(TWCR&(1<<TWINT)));
    PORTD = TWSR;
    TWDR = SLAVEADRR;
    TWCR =(1<<TWINT)|(1<<TWEN);
    while(!(TWCR&(1<<TWINT)));
    PORTD=TWSR;
    TWCR =(1<<TWINT)|(1<<TWEN);

    TWCR = (1<<TWINT)|(1<<TWSTO)|(1<<TWEN);
    wert = TWDR;
    PORTD=wert;

    while(1)

    return 0;
}