// Define BAUD rate and F_CPU in #UART.h

/*
 * Main.c
 *
 * Created: 06.12.2021 14:57:48
 */ 

//controller: ATMEGA328P (same mikrocontroller as on Arduino UNO)

#include <stdio.h>
#include <avr/io.h>
#include "UART.h"
#include <util/delay.h>
#include <avr/interrupt.h>
#include <string.h>
#include <util/twi.h>
#include <stdlib.h>

#include "i2cmaster.h"


#include <util/setbaud.h>

// define I2C Addresses
#define AS72621_ADDR 0x49


int main()
{
	// init UART
	UART_Setup_init();
	UART_interupt_init();
	sei() ;
	FILE str_uart = FDEV_SETUP_STREAM(uart_putc, NULL, _FDEV_SETUP_WRITE);
	stdout = &str_uart;
	//test UART
	printf( "Test UART printf \n");	
	fprintf(&str_uart, "Test UART fprintf \n");	
	// TWI Enable
	unsigned char ret;
	i2c_init();
	
	*/ also tried : i2c_start(AS72621_ADDR+I2C_WRITE) / i2c_start((AS72621_ADDR)
	ret = i2c_start((AS72621_ADDR<<1)+I2C_WRITE);       // set device address and write mode
    if ( ret ) {
        // failed to issue start condition, possibly no device found /
        i2c_stop();
        printf("TWI Start Error \n");                  
    }else {
		printf("no error \n");     
    }
	i2c_stop();

	//TWIReadACK();
	//read_sensor();
	
}