changed file headers to reflect the totally refactored state of the serial and print modules

print.c

@@ -1,3 +1,27 @@
+/*
+  print.c - Functions for formatting output strings
+  Part of Grbl
+
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
+
+  Grbl is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Grbl is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This code was initially inspired by the wiring_serial module by David A. Mellis which
+   used to be a part of the Arduino project. */ 
+
+
 #include <math.h>
 #include <avr/pgmspace.h>
 #include "serial.h"

print.h

@@ -1,3 +1,26 @@
+/*
+  print.h - Functions for formatting output strings
+  Part of Grbl
+
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
+
+  Grbl is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Grbl is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This code was initially inspired by the wiring_serial module by David A. Mellis which
+   used to be a part of the Arduino project. */ 
+
 #ifndef print_h
 #define print_h
 

serial.c

@@ -1,26 +1,26 @@
 /*
-  serial.c - serial functions.
+  serial.c - Low level functions for sending and recieving bytes via the serial port
-  Part of Arduino - http://www.arduino.cc/
+  Part of Grbl
 
-  Copyright (c) 2005-2006 David A. Mellis
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
 
-  This library is free software; you can redistribute it and/or
+  Grbl is free software: you can redistribute it and/or modify
-  modify it under the terms of the GNU Lesser General Public
+  it under the terms of the GNU General Public License as published by
-  License as published by the Free Software Foundation; either
+  the Free Software Foundation, either version 3 of the License, or
-  version 2.1 of the License, or (at your option) any later version.
+  (at your option) any later version.
 
-  This library is distributed in the hope that it will be useful,
+  Grbl is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  Lesser General Public License for more details.
+  GNU General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General
-  Public License along with this library; if not, write to the
-  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-  Boston, MA  02111-1307  USA
 
+  You should have received a copy of the GNU General Public License
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+/* This code was initially inspired by the wiring_serial module by David A. Mellis which
+   used to be a part of the Arduino project. */ 
+
 #include <avr/interrupt.h>
 #include <avr/sleep.h>
 
@@ -93,10 +93,7 @@ SIGNAL(USART_UDRE_vect) {
   tx_buffer_tail = tail;
 
   // Turn off Data Register Empty Interrupt if this concludes the transfer
-  if (tail == tx_buffer_head) { 
+  if (tail == tx_buffer_head) { UCSR0B &= ~(1 << UDRIE0); }
-    UCSR0B &= ~(1 << UDRIE0); 
-  }
-
 }
 
 uint8_t serial_read()
@@ -124,4 +121,3 @@ SIGNAL(USART_RX_vect)
 		rx_buffer_head = next_head;
 	}
 }
-

serial.h

@@ -1,27 +1,26 @@
 /*
-  Based on wiring.h - Partial implementation of the Wiring API for the ATmega8.
+  serial.c - Low level functions for sending and recieving bytes via the serial port
-  Part of Arduino - http://www.arduino.cc/
+  Part of Grbl
 
-  Copyright (c) 2005-2006 David A. Mellis
+  Copyright (c) 2009-2011 Simen Svale Skogsrud
 
-  This library is free software; you can redistribute it and/or
+  Grbl is free software: you can redistribute it and/or modify
-  modify it under the terms of the GNU Lesser General Public
+  it under the terms of the GNU General Public License as published by
-  License as published by the Free Software Foundation; either
+  the Free Software Foundation, either version 3 of the License, or
-  version 2.1 of the License, or (at your option) any later version.
+  (at your option) any later version.
 
-  This library is distributed in the hope that it will be useful,
+  Grbl is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  Lesser General Public License for more details.
+  GNU General Public License for more details.
 
-  You should have received a copy of the GNU Lesser General
+  You should have received a copy of the GNU General Public License
-  Public License along with this library; if not, write to the
+  along with Grbl.  If not, see <http://www.gnu.org/licenses/>.
-  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-  Boston, MA  02111-1307  USA
-
-  $Id: wiring.h 387 2008-03-08 21:30:00Z mellis $
 */
 
+/* This code was initially inspired by the wiring_serial module by David A. Mellis which
+   used to be a part of the Arduino project. */ 
+
 #ifndef serial_h
 #define serial_h