diff --git a/prosjekt.X/header.h b/prosjekt.X/header.h
index 8a03290..9cfe156 100644
--- a/prosjekt.X/header.h
+++ b/prosjekt.X/header.h
@@ -26,6 +26,17 @@
  * Revision history: 
  */
 
+#define F_CPU 4000000UL
+#define RTC_PERIOD (511)
+#define DELAY_TIME 1000
+#define USART3_BAUD_RATE(BAUD_RATE) ((float) (64*F_CPU /(16*(float)BAUD_RATE) )+0.5)
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdio.h>
+
 // This is a guard condition so that contents of this file are not included
 // more than once.  
 #ifndef XC_HEADER_TEMPLATE_H
@@ -33,46 +44,81 @@
 
 #include <xc.h> // include processor files - each processor file is guarded.  
 
-// TODO Insert appropriate #include <>
+uint16_t adcVal;
 
-// TODO Insert C++ class definitions if appropriate
-
-// TODO Insert declarations
-
-// Comment a function and leverage automatic documentation with slash star star
-/**
-    <p><b>Function prototype:</b></p>
-  
-    <p><b>Summary:</b></p>
-
-    <p><b>Description:</b></p>
-
-    <p><b>Precondition:</b></p>
-
-    <p><b>Parameters:</b></p>
-
-    <p><b>Returns:</b></p>
-
-    <p><b>Example:</b></p>
-    <code>
- 
-    </code>
-
-    <p><b>Remarks:</b></p>
- */
-// TODO Insert declarations or function prototypes (right here) to leverage 
-// live documentation
-
-#ifdef	__cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-    // TODO If C++ is being used, regular C code needs function names to have C 
-    // linkage so the functions can be used by the c code. 
-
-#ifdef	__cplusplus
+void led_init(void)
+{	
+	/* Disable digital input buffer */
+	PORTC.PIN6CTRL &= ~PORT_ISC_gm;
+	PORTC.PIN6CTRL |= PORT_ISC_INPUT_DISABLE_gc;
+	/* Disable pull-up resistor */
+	PORTC.PIN6CTRL &= ~PORT_PULLUPEN_bm;
+	PORTE.DIRSET = PIN0_bm;
+	PORTE.DIRSET = PIN1_bm;
+	PORTE.DIRSET = PIN2_bm;
+	
 }
-#endif /* __cplusplus */
 
-#endif	/* XC_HEADER_TEMPLATE_H */
+void USART3_init(void)
+{
+	PORTB.DIRCLR &= ~PIN1_bm;
+	PORTB.DIRSET |= PIN0_bm;
+	PORTB.DIRCLR = PIN2_bm;
+	PORTB.PIN2CTRL |= PORT_PULLUPEN_bm;
+	USART3.CTRLB |= USART_RXEN_bm | USART_TXEN_bm; /* Enable both TX and
+	RX */
+	USART3.BAUD = USART3_BAUD_RATE (9600); /* Setting the baudrate */
+}
 
+void ADC0_init(void)
+{
+	
+	ADC0.CTRLC = ADC_PRESC_DIV4_gc;
+	VREF.ADC0REF = VREF_REFSEL_VDD_gc; /* Internal reference */
+	ADC0.CTRLA = ADC_ENABLE_bm /* ADC Enable: enabled */
+	| ADC_RESSEL_10BIT_gc; /* 10-bit mode */
+	/* Select ADC channel */
+	ADC0.MUXPOS = ADC_MUXPOS_AIN6_gc;
+}
+
+void USART3_sendChar(char c)
+{
+	while (!(USART3.STATUS & USART_DREIF_bm))
+	{
+		;
+	}
+	USART3.TXDATAL = c;
+}
+
+void USART3_sendString(char *str)
+{
+	for(size_t i = 0; i < strlen(str); i++)
+	{
+		USART3_sendChar(str[i]);
+	}
+}
+
+static int USART3_printChar(char c, FILE *stream)
+{
+	USART3_sendChar(c);
+	return 0;
+}
+
+uint16_t ADC0_read(void)
+{
+	/* Start ADC conversion */
+	ADC0.COMMAND = ADC_STCONV_bm;
+	/* Wait until ADC conversion done */
+	while ( !(ADC0.INTFLAGS & ADC_RESRDY_bm) )
+	{
+		;
+	}
+	/* Clear the interrupt flag by writing 1: */
+	ADC0.INTFLAGS = ADC_RESRDY_bm;
+	return ADC0.RES;
+}
+
+bool ADC0_conersionDone(void)
+{
+	return (ADC0.INTFLAGS & ADC_RESRDY_bm);
+}