Comments and whitespace.

hello_uart/main.c

@@ -5,6 +5,7 @@
  * Led at Arduino digital 13 (PORTB5). Cause we all love blinken leds!
  *
  * To compile and upload run: make clean; make; make program;
+ * Connect to serial with: screen /dev/tty.usbserial-* 9600
  *
  * Copyright 2011 Mika Tuupola
  *

hello_uart/uart.c

@@ -30,3 +30,4 @@ int uart_getchar(FILE *stream) {
     return UDR0;
 }
 
+

hello_uart/uart.h

@@ -3,5 +3,7 @@ int uart_getchar(FILE *stream);
 
 void uart_init(void);
 
+/* http://www.ermicro.com/blog/?p=325 */
+
 FILE uart_output = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
 FILE uart_input = FDEV_SETUP_STREAM(NULL, uart_getchar, _FDEV_SETUP_READ);