more detailed comments in uart.c

uart.c

@@ -17,7 +17,7 @@ void uart_init()
 
     UART_CTRL_REGC |= (1<<UART_URSEL_BM)
                      |(1<<UART_UCSZ0_BM)
-                     |(1<<UART_UCSZ1_BM);             // 8bit data format
+                     |(1<<UART_UCSZ1_BM);     // 8bit data format
 
     stdout = &uart_output;
 }
@@ -42,11 +42,11 @@ void read_sync(char buffer[], uint8_t buffersize, uint8_t * bufferindex){
         while ((UART_CTRL_REGA & (1 << UART_RXC_BM)) == 0);
         input = UART_DATA_REG;
 
-        putchar(input); //echo
+        putchar(input); // echo
         buffer[*bufferindex]=input;
         *bufferindex=*bufferindex+1;
     }while(!(input == '\n' || input == '\r'));
-    buffer[*bufferindex]=0;
+    buffer[*bufferindex]=0; // null terminate
     putchar('\n');
 }