Trying to interface Oled display with MLX90614 IR Sensor - c

Question

Hi i am working on a school project where I'm supposed to output temperature values on an Oled display.
i have managed to do it with Arduino Code so i know that the sensor and display works, but the code has to be written in Atmel studio in pure embedded C for the project.
I'm not sure what I'm doing wrong and what I'm am doing right.
I'm struggling with C code and the I2C protocol.
i have done a lot of research on the subject but evertime i seem to only find arduino tutorials, or theory related posts.
I'm totally new to programming.
anyway this is the code i have come up with so far.
the txt i have written for the display is displayed. everthing works as it should except for the temperatur values:
#define F_CPU 16000000UL
#include <avr/io.h>
#include <stdio.h>
#include <stdlib.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "OLED.h"
#include "ATmega_Init.h"
#include "i2c_master.h"
//From Arduino Adafruit_MLX90614 lib
// RAM
#define MLX90614_RAWIR1 0x04
#define MLX90614_RAWIR2 0x05 //Important for reading out
#define MLX90614_TA 0x06
#define MLX90614_TOBJ1 0x07
#define MLX90614_TOBJ2 0x08
// EEPROM
#define MLX90614_TOMAX 0x20
#define MLX90614_TOMIN 0x21
#define MLX90614_PWMCTRL 0x22
#define MLX90614_TARANGE 0x23
#define MLX90614_EMISS 0x24
#define MLX90614_CONFIG 0x25
#define MLX90614_ADDR 0x0E
#define MLX90614_ID1 0x3C
#define MLX90614_ID2 0x3D
#define MLX90614_ID3 0x3E
#define MLX90614_ID4 0x3F
#define SLAVE_ADDRESS 0x5A
int main(void)
{
//uint8_t test_recieve[2];
uint16_t test_recieve_high; //To receive the high byte
uint16_t test_recieve_low; //To receive the low byte
init_atmega_setup();
initDisplay();
i2c_init();
clsDisplay();
strFont5XY("Floor Unit",25,3);
_delay_ms(2000);
clsDisplay();
//uint8_t receive_command = 0x00; //Needs the receive command,
definitely not just 0x00
while(1){
i2c_start(SLAVE_ADDRESS);
i2c_write(MLX90614_TOBJ1);
i2c_start(SLAVE_ADDRESS);
test_recieve_high = i2c_read_ack();
i2c_start(MLX90614_TOBJ1);
test_recieve_high = ((uint8_t)i2c_read_ack())<<8;
test_recieve_high |= i2c_read_ack();
i2c_stop();
i2c_start(SLAVE_ADDRESS);
i2c_write(MLX90614_TOBJ1);*/
i2c_start(MLX90614_TOBJ1);
test_recieve_low = ((uint8_t)i2c_read_ack())<<8;
test_recieve_low |= i2c_read_ack();
i2c_stop();
intFont5XY(test_recieve_low,1,0);
intFont5XY(test_recieve_high,1,1);
_delay_ms(1000);
};
};