Added initial files

usart_printf/usart_printf.c

@@ -0,0 +1,32 @@
+#include <avr/io.h>
+#include <avr/sfr_defs.h>
+#include <stdio.h>
+
+#define BAUD_RATE 9600
+#define BAUD_PRESCALE (F_CPU/16/BAUD_RATE-1)
+
+void usart_initialize(void) {
+	UBRR0H = (BAUD_PRESCALE >> 8);
+	UBRR0L = BAUD_PRESCALE;
+
+	//Enable receive and transmit
+	UCSR0B = (1<<RXEN0) | (1<<TXEN0);
+
+	// Set frame to 8 bits
+	UCSR0C = (1<<UCSZ01) | (1<<UCSZ00);
+}
+
+void usart_send_byte(char byte, FILE *stream) {
+	if (byte == '\n') {
+		usart_send_byte('\r',stream);
+	}
+		loop_until_bit_is_set(UCSR0A,UDRE0);
+		UDR0 = byte;
+	
+}
+
+
+char usart_get_byte(FILE *stream) {
+    loop_until_bit_is_set(UCSR0A, RXC0);
+    return UDR0;
+}

usart_printf/usart_printf.h

@@ -0,0 +1,18 @@
+#ifndef USART_PRINTF_H
+#define USART_PRINTF_H
+#include <stdio.h>
+
+
+
+void usart_send_byte(char byte, FILE *stream);
+char usart_get_byte(FILE *stream);
+void usart_initialize(void);
+
+
+FILE uart_output = FDEV_SETUP_STREAM(usart_send_byte, NULL, _FDEV_SETUP_WRITE);
+FILE uart_input = FDEV_SETUP_STREAM(NULL, usart_get_byte, _FDEV_SETUP_READ);
+
+
+
+
+#endif