Initial NWO check in

arduino-mk/Arduino.mk

@@ -0,0 +1,513 @@
+########################################################################
+#
+# Arduino command line tools Makefile
+# System part (i.e. project independent)
+#
+# Copyright (C) 2010,2011,2012 Martin Oldfield <m@mjo.tc>, based on
+# work that is copyright Nicholas Zambetti, David A. Mellis & Hernando
+# Barragan.
+# 
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# Adapted from Arduino 0011 Makefile by M J Oldfield
+#
+# Original Arduino adaptation by mellis, eighthave, oli.keller
+#
+# Version 0.1  17.ii.2009  M J Oldfield
+#
+#         0.2  22.ii.2009  M J Oldfield
+#                          - fixes so that the Makefile actually works!
+#                          - support for uploading via ISP
+#                          - orthogonal choices of using the Arduino for
+#                            tools, libraries and uploading
+#
+#         0.3  21.v.2010   M J Oldfield
+#                          - added proper license statement
+#                          - added code from Philip Hands to reset
+#                            Arduino prior to upload
+#
+#         0.4  25.v.2010   M J Oldfield
+#                          - tweaked reset target on Philip Hands' advice
+#
+#         0.5  23.iii.2011 Stefan Tomanek
+#                          - added ad-hoc library building
+#              17.v.2011   M J Oldfield
+#                          - grabbed said version from Ubuntu
+#
+#         0.6  22.vi.2011  M J Oldfield
+#                          - added ard-parse-boards supports
+#                          - added -lc to linker opts, 
+#                            on Fabien Le Lez's advice
+#
+#         0.7  12.vii.2011 M J Oldfield
+#                          - moved -lm to the end of linker opts,
+#	                     to solve Frank Knopf's problem;
+#                          - added -F to stty opts: Craig Hollabaugh 
+#	                     reckons it's good for Ubuntu
+#
+#         0.8  12.ii.2012  M J Oldfield
+#                          - Patches for Arduino 1.0 IDE:
+#                              support .ino files;
+#                              handle board 'variants';
+#                              tweaked compile flags.
+#                          - Build a library from all the system
+#                            supplied code rather than linking the .o
+#                            files directly.
+#                          - Let TARGET default to current directory
+#			     as per Daniele Vergini's patch.
+#                          - Add support for .c files in system
+#                            libraries: Dirk-Willem van Gulik and Evan
+#                            Goldenberg both reported this and
+#                            provided patches in the same spirit.
+#
+########################################################################
+#
+# STANDARD ARDUINO WORKFLOW
+#
+# Given a normal sketch directory, all you need to do is to create
+# a small Makefile which defines a few things, and then includes this one.
+#
+# For example:
+#
+#       ARDUINO_DIR  = /Applications/arduino-0013
+#
+#       TARGET       = CLItest
+#       ARDUINO_LIBS = Ethernet Ethernet/utility SPI
+#
+#       BOARD_TAG    = uno
+#       ARDUINO_PORT = /dev/cu.usb*
+#
+#       include /usr/local/share/Arduino.mk
+#
+# Hopefully these will be self-explanatory but in case they're not:
+#
+#    ARDUINO_DIR  - Where the Arduino software has been unpacked
+#
+#    TARGET       - The basename used for the final files. Canonically
+#                   this would match the .pde file, but it's not needed
+#                   here: you could always set it to xx if you wanted!
+#
+#    ARDUINO_LIBS - A list of any libraries used by the sketch (we
+#                   assume these are in
+#                   $(ARDUINO_DIR)/hardware/libraries 
+#
+#    ARDUINO_PORT - The port where the Arduino can be found (only needed
+#                   when uploading
+#
+#    BOARD_TAG    - The ard-parse-boards tag for the board e.g. uno or mega
+#                   'make show_boards' shows a list
+#
+# You might also want to specify these, but normally they'll be read from the
+# boards.txt file i.e. implied by BOARD_TAG
+#
+#    MCU,F_CPU    - The target processor description
+#
+# Once this file has been created the typical workflow is just
+#
+#   $ make upload
+#
+# All of the object files are created in the build-cli subdirectory
+# All sources should be in the current directory and can include:
+#  - at most one .pde or .ino file which will be treated as C++ after
+#    the standard Arduino header and footer have been affixed.
+#  - any number of .c, .cpp, .s and .h files
+#
+# Included libraries are built in the build-cli/libs subdirectory.
+#
+# Besides make upload you can also
+#   make             - no upload
+#   make clean       - remove all our dependencies
+#   make depends     - update dependencies
+#   make reset       - reset the Arduino by tickling DTR on the serial port
+#   make raw_upload  - upload without first resetting
+#   make show_boards - list all the boards defined in boards.txt
+#
+########################################################################
+#
+# ARDUINO WITH OTHER TOOLS
+#
+# If the tools aren't in the Arduino distribution, then you need to 
+# specify their location:
+#
+#    AVR_TOOLS_PATH = /usr/bin
+#    AVRDUDE_CONF   = /etc/avrdude/avrdude.conf
+#
+########################################################################
+#
+# ARDUINO WITH ISP
+#
+# You need to specify some details of your ISP programmer and might
+# also need to specify the fuse values:
+#
+#     ISP_PROG	   = -c stk500v2
+#     ISP_PORT     = /dev/ttyACM0
+#
+# You might also need to set the fuse bits, but typically they'll be
+# read from boards.txt, based on the BOARD_TAG variable:
+#     
+#     ISP_LOCK_FUSE_PRE  = 0x3f
+#     ISP_LOCK_FUSE_POST = 0xcf
+#     ISP_HIGH_FUSE      = 0xdf
+#     ISP_LOW_FUSE       = 0xff
+#     ISP_EXT_FUSE       = 0x01
+#
+# I think the fuses here are fine for uploading to the ATmega168
+# without bootloader.
+# 
+# To actually do this upload use the ispload target:
+#
+#    make ispload
+#
+#
+########################################################################
+
+########################################################################
+# 
+# Default TARGET to cwd (ex Daniele Vergini)
+ifndef TARGET
+TARGET  = $(notdir $(CURDIR))
+endif
+
+########################################################################
+
+#
+# Arduino version number
+ifndef ARDUINO_VERSION
+ARDUINO_VERSION = 100
+endif
+
+#
+# Some paths
+#
+
+ifneq (ARDUINO_DIR,)
+
+ifndef AVR_TOOLS_PATH
+AVR_TOOLS_PATH    = $(ARDUINO_DIR)/hardware/tools/avr/bin
+endif
+
+ifndef ARDUINO_ETC_PATH
+ARDUINO_ETC_PATH  = $(ARDUINO_DIR)/hardware/tools/avr/etc
+endif
+
+ifndef AVRDUDE_CONF
+AVRDUDE_CONF     = $(ARDUINO_ETC_PATH)/avrdude.conf
+endif
+
+ARDUINO_LIB_PATH  = $(ARDUINO_DIR)/libraries
+ARDUINO_CORE_PATH = $(ARDUINO_DIR)/hardware/arduino/cores/arduino
+ARDUINO_VAR_PATH  = $(ARDUINO_DIR)/hardware/arduino/variants
+
+endif
+
+########################################################################
+# boards.txt parsing
+#
+ifndef BOARD_TAG
+BOARD_TAG   = uno
+endif
+
+ifndef BOARDS_TXT
+BOARDS_TXT  = $(ARDUINO_DIR)/hardware/arduino/boards.txt
+endif
+
+ifndef PARSE_BOARD
+PARSE_BOARD = ard-parse-boards --boards_txt=$(BOARDS_TXT)
+endif
+
+# Which variant ? This affects the include path
+ifndef VARIANT
+VARIANT = $(shell $(PARSE_BOARD) $(BOARD_TAG) build.variant)
+endif
+
+# processor stuff
+ifndef MCU
+MCU   = $(shell $(PARSE_BOARD) $(BOARD_TAG) build.mcu)
+endif
+
+ifndef F_CPU
+F_CPU = $(shell $(PARSE_BOARD) $(BOARD_TAG) build.f_cpu)
+endif
+
+# normal programming info
+ifndef AVRDUDE_ARD_PROGRAMMER
+AVRDUDE_ARD_PROGRAMMER = $(shell $(PARSE_BOARD) $(BOARD_TAG) upload.protocol)
+endif
+
+ifndef AVRDUDE_ARD_BAUDRATE
+AVRDUDE_ARD_BAUDRATE   = $(shell $(PARSE_BOARD) $(BOARD_TAG) upload.speed)
+endif
+
+# fuses if you're using e.g. ISP
+ifndef ISP_LOCK_FUSE_PRE
+ISP_LOCK_FUSE_PRE  = $(shell $(PARSE_BOARD) $(BOARD_TAG) bootloader.unlock_bits)
+endif
+
+ifndef ISP_LOCK_FUSE_POST
+ISP_LOCK_FUSE_POST = $(shell $(PARSE_BOARD) $(BOARD_TAG) bootloader.lock_bits)
+endif
+
+ifndef ISP_HIGH_FUSE
+ISP_HIGH_FUSE      = $(shell $(PARSE_BOARD) $(BOARD_TAG) bootloader.high_fuses)
+endif
+
+ifndef ISP_LOW_FUSE
+ISP_LOW_FUSE       = $(shell $(PARSE_BOARD) $(BOARD_TAG) bootloader.low_fuses)
+endif
+
+ifndef ISP_EXT_FUSE
+ISP_EXT_FUSE       = $(shell $(PARSE_BOARD) $(BOARD_TAG) bootloader.extended_fuses)
+endif
+
+# Everything gets built in here
+OBJDIR  	  = build-cli
+
+########################################################################
+# Local sources
+#
+LOCAL_C_SRCS    = $(wildcard *.c)
+LOCAL_CPP_SRCS  = $(wildcard *.cpp)
+LOCAL_CC_SRCS   = $(wildcard *.cc)
+LOCAL_PDE_SRCS  = $(wildcard *.pde)
+LOCAL_INO_SRCS  = $(wildcard *.ino)
+LOCAL_AS_SRCS   = $(wildcard *.S)
+LOCAL_OBJ_FILES = $(LOCAL_C_SRCS:.c=.o)   $(LOCAL_CPP_SRCS:.cpp=.o) \
+		$(LOCAL_CC_SRCS:.cc=.o)   $(LOCAL_PDE_SRCS:.pde=.o) \
+		$(LOCAL_INO_SRCS:.ino=.o) $(LOCAL_AS_SRCS:.S=.o)
+LOCAL_OBJS      = $(patsubst %,$(OBJDIR)/%,$(LOCAL_OBJ_FILES))
+
+# Dependency files
+DEPS            = $(LOCAL_OBJS:.o=.d)
+
+# core sources
+ifeq ($(strip $(NO_CORE)),)
+ifdef ARDUINO_CORE_PATH
+CORE_C_SRCS     = $(wildcard $(ARDUINO_CORE_PATH)/*.c)
+CORE_CPP_SRCS   = $(wildcard $(ARDUINO_CORE_PATH)/*.cpp)
+CORE_OBJ_FILES  = $(CORE_C_SRCS:.c=.o) $(CORE_CPP_SRCS:.cpp=.o)
+CORE_OBJS       = $(patsubst $(ARDUINO_CORE_PATH)/%,  \
+			$(OBJDIR)/%,$(CORE_OBJ_FILES))
+endif
+endif
+
+
+########################################################################
+# Rules for making stuff
+#
+
+# The name of the main targets
+TARGET_HEX = $(OBJDIR)/$(TARGET).hex
+TARGET_ELF = $(OBJDIR)/$(TARGET).elf
+TARGETS    = $(OBJDIR)/$(TARGET).*
+CORE_LIB   = $(OBJDIR)/libcore.a
+
+# A list of dependencies
+DEP_FILE   = $(OBJDIR)/depends.mk
+
+# Names of executables
+CC      = $(AVR_TOOLS_PATH)/avr-gcc
+CXX     = $(AVR_TOOLS_PATH)/avr-g++
+OBJCOPY = $(AVR_TOOLS_PATH)/avr-objcopy
+OBJDUMP = $(AVR_TOOLS_PATH)/avr-objdump
+AR      = $(AVR_TOOLS_PATH)/avr-ar
+SIZE    = $(AVR_TOOLS_PATH)/avr-size
+NM      = $(AVR_TOOLS_PATH)/avr-nm
+REMOVE  = rm -f
+MV      = mv -f
+CAT     = cat
+ECHO    = echo
+
+# General arguments
+SYS_LIBS      = $(patsubst %,$(ARDUINO_LIB_PATH)/%,$(ARDUINO_LIBS))
+SYS_INCLUDES  = $(patsubst %,-I%,$(SYS_LIBS))
+LIB_C_SRCS    = $(wildcard $(patsubst %,%/*.c,$(SYS_LIBS)))
+LIB_CPP_SRCS  = $(wildcard $(patsubst %,%/*.cpp,$(SYS_LIBS)))
+LIB_OBJS      = $(patsubst $(ARDUINO_LIB_PATH)/%.c,$(OBJDIR)/libs/%.o,$(LIB_C_SRCS)) \
+		$(patsubst $(ARDUINO_LIB_PATH)/%.cpp,$(OBJDIR)/libs/%.o,$(LIB_CPP_SRCS))
+
+CPPFLAGS      = -mmcu=$(MCU) -DF_CPU=$(F_CPU) -DARDUINO=$(ARDUINO_VERSION) \
+			-I. -I$(ARDUINO_CORE_PATH) -I$(ARDUINO_VAR_PATH)/$(VARIANT) \
+			$(SYS_INCLUDES) -g -Os -w -Wall \
+			-ffunction-sections -fdata-sections
+CFLAGS        = -std=gnu99
+CXXFLAGS      = -fno-exceptions
+ASFLAGS       = -mmcu=$(MCU) -I. -x assembler-with-cpp
+LDFLAGS       = -mmcu=$(MCU) -Wl,--gc-sections -Os
+
+# Expand and pick the first port
+ARD_PORT      = $(firstword $(wildcard $(ARDUINO_PORT)))
+
+# Implicit rules for building everything (needed to get everything in
+# the right directory)
+#
+# Rather than mess around with VPATH there are quasi-duplicate rules
+# here for building e.g. a system C++ file and a local C++
+# file. Besides making things simpler now, this would also make it
+# easy to change the build options in future
+
+# library sources
+$(OBJDIR)/libs/%.o: $(ARDUINO_LIB_PATH)/%.c
+	mkdir -p $(dir $@)
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/libs/%.o: $(ARDUINO_LIB_PATH)/%.cpp
+	mkdir -p $(dir $@)
+	$(CC) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+# normal local sources
+# .o rules are for objects, .d for dependency tracking
+# there seems to be an awful lot of duplication here!!!
+$(OBJDIR)/%.o: %.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.cc
+	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.cpp
+	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.S
+	$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.s
+	$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@
+
+$(OBJDIR)/%.d: %.c
+	$(CC) -MM $(CPPFLAGS) $(CFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+$(OBJDIR)/%.d: %.cc
+	$(CXX) -MM $(CPPFLAGS) $(CXXFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+$(OBJDIR)/%.d: %.cpp
+	$(CXX) -MM $(CPPFLAGS) $(CXXFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+$(OBJDIR)/%.d: %.S
+	$(CC) -MM $(CPPFLAGS) $(ASFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+$(OBJDIR)/%.d: %.s
+	$(CC) -MM $(CPPFLAGS) $(ASFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+# the pde -> cpp -> o file
+$(OBJDIR)/%.cpp: %.pde
+	$(ECHO) '#include "WProgram.h"' > $@
+	$(CAT)  $< >> $@
+
+# the ino -> cpp -> o file
+$(OBJDIR)/%.cpp: %.ino
+	$(ECHO) '#include <Arduino.h>' > $@
+	$(CAT)  $< >> $@
+
+$(OBJDIR)/%.o: $(OBJDIR)/%.cpp
+	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/%.d: $(OBJDIR)/%.cpp
+	$(CXX) -MM $(CPPFLAGS) $(CXXFLAGS) $< -MF $@ -MT $(@:.d=.o)
+
+# core files
+$(OBJDIR)/%.o: $(ARDUINO_CORE_PATH)/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: $(ARDUINO_CORE_PATH)/%.cpp
+	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+# various object conversions
+$(OBJDIR)/%.hex: $(OBJDIR)/%.elf
+	$(OBJCOPY) -O ihex -R .eeprom $< $@
+
+$(OBJDIR)/%.eep: $(OBJDIR)/%.elf
+	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
+		--change-section-lma .eeprom=0 -O ihex $< $@
+
+$(OBJDIR)/%.lss: $(OBJDIR)/%.elf
+	$(OBJDUMP) -h -S $< > $@
+
+$(OBJDIR)/%.sym: $(OBJDIR)/%.elf
+	$(NM) -n $< > $@
+
+########################################################################
+#
+# Avrdude
+#
+ifndef AVRDUDE
+AVRDUDE          = $(AVR_TOOLS_PATH)/avrdude
+endif
+
+AVRDUDE_COM_OPTS = -q -V -p $(MCU)
+ifdef AVRDUDE_CONF
+AVRDUDE_COM_OPTS += -C $(AVRDUDE_CONF)
+endif
+
+AVRDUDE_ARD_OPTS = -c $(AVRDUDE_ARD_PROGRAMMER) -b $(AVRDUDE_ARD_BAUDRATE) -P $(ARD_PORT)
+
+ifndef ISP_PROG
+ISP_PROG	   = -c stk500v2
+endif
+
+AVRDUDE_ISP_OPTS = -P $(ISP_PORT) $(ISP_PROG)
+
+
+########################################################################
+#
+# Explicit targets start here
+#
+
+all: 		$(OBJDIR) $(TARGET_HEX)
+
+$(OBJDIR):
+		mkdir $(OBJDIR)
+
+$(TARGET_ELF): 	$(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS)
+		$(CC) $(LDFLAGS) -o $@ $(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS) -lc -lm
+
+$(CORE_LIB):	$(CORE_OBJS) $(LIB_OBJS)
+		$(AR) rcs $@ $(CORE_OBJS) $(LIB_OBJS)
+
+$(DEP_FILE):	$(OBJDIR) $(DEPS)
+		cat $(DEPS) > $(DEP_FILE)
+
+upload:		reset raw_upload
+
+raw_upload:	$(TARGET_HEX)
+		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ARD_OPTS) \
+			-U flash:w:$(TARGET_HEX):i
+
+# stty on MacOS likes -F, but on Debian it likes -f redirecting
+# stdin/out appears to work but generates a spurious error on MacOS at
+# least. Perhaps it would be better to just do it in perl ?
+reset:		
+		for STTYF in 'stty -F' 'stty --file' 'stty -f' 'stty <' ; \
+		  do $$STTYF /dev/tty >/dev/null 2>/dev/null && break ; \
+		done ;\
+		$$STTYF $(ARD_PORT)  hupcl ;\
+		(sleep 0.1 || sleep 1)     ;\
+		$$STTYF $(ARD_PORT) -hupcl 
+
+ispload:	$(TARGET_HEX)
+		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) -e \
+			-U lock:w:$(ISP_LOCK_FUSE_PRE):m \
+			-U hfuse:w:$(ISP_HIGH_FUSE):m \
+			-U lfuse:w:$(ISP_LOW_FUSE):m \
+			-U efuse:w:$(ISP_EXT_FUSE):m
+		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) -D \
+			-U flash:w:$(TARGET_HEX):i
+		$(AVRDUDE) $(AVRDUDE_COM_OPTS) $(AVRDUDE_ISP_OPTS) \
+			-U lock:w:$(ISP_LOCK_FUSE_POST):m
+
+clean:
+		$(REMOVE) $(LOCAL_OBJS) $(CORE_OBJS) $(LIB_OBJS) $(CORE_LIB) $(TARGETS) $(DEP_FILE) $(DEPS)
+
+depends:	$(DEPS)
+		cat $(DEPS) > $(DEP_FILE)
+
+size:		$(OBJDIR) $(TARGET_HEX)
+		$(SIZE) $(TARGET_HEX)
+
+show_boards:	
+		$(PARSE_BOARD) --boards
+
+.PHONY:	all clean depends upload raw_upload reset size show_boards
+
+include $(DEP_FILE)

arduino-mk/ard-parse-boards

@@ -0,0 +1,261 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+
+use Getopt::Long;
+use Pod::Usage;
+use YAML;
+
+my %Opt = 
+  (
+   boards_txt => '/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/boards.txt',
+  );
+
+GetOptions(\%Opt,
+	   "boards_txt=s", # filename of the boards.txt file
+	   "find!",        # search for data
+	   "dump!",        # dump the whole database
+	   "boards!",      # dump a list of boards
+	   "help!",  
+	   "info!",
+	  );
+
+if ($Opt{help} || $Opt{info})
+  {
+    usage();
+  }
+
+my $db = parse_boards($Opt{boards_txt});
+
+if ($Opt{dump}) 
+  { 
+    dump_data("$Opt{boards_txt} contains:", $db);
+  }
+elsif ($Opt{find})
+  {
+    my @terms = @ARGV or usage();
+    find_data($db, \@terms);
+  }
+elsif ($Opt{boards})
+  {
+    dump_boards($db);
+  }
+else
+  {
+    my $tag = shift @ARGV or usage();
+    
+    if (my $key = shift @ARGV)
+      {
+	die "$key isn't defined for the $tag board, "
+	  unless $db->{$tag} && exists $db->{$tag}->{$key};
+
+	print $db->{$tag}->{$key}, "\n";
+      }
+    else
+      {
+	die "The $tag board isn't defined, "
+	  unless $db->{$tag};
+
+	dump_data("The $tag board:", $db->{$tag});
+      }
+  }
+
+## here endeth the main
+
+sub usage 
+  {
+    pod2usage(-verbose => 2);
+  }
+
+# return HoH: {board}->{field} = value
+sub parse_boards
+  {
+    my $filename = shift;
+
+    my %b;
+
+    open(my $fh, '<', $filename) 
+      or die "Can't open $filename, ";
+
+    while(<$fh>)
+      {
+	my ($board, $key, $value) = /^\s*(\S+?)\.(\S+?)\s*=\s*(.+?)\s*$/
+	  or next;
+
+	$b{$board}->{$key} = $value;
+      }
+
+    return \%b;
+  }
+
+# A rudimentary search engine
+sub find_data
+  {
+    my ($db, $term_list) = @_;
+
+    my @q = map { qr/$_/i } @$term_list;
+    my $q = join(' && ', map { "/$_/i" } @$term_list);
+
+    my %hit;
+    foreach my $b (keys %$db)
+      {
+	foreach my $k (keys %{$db->{$b}})
+	  {
+	    my $v = $db->{$b}->{$k};
+	    $hit{$b}->{$k} = $v if !grep { $v !~ /$_/i } @q;
+	  }
+      }
+
+    dump_data("Matches for $q:", \%hit);
+  }
+
+# The list of boards...
+sub dump_boards
+  {
+    my $db = shift or return;
+
+    my %name;
+    my $max_l = 0;
+    foreach my $b (keys %$db)
+      {
+	$name{$b} = $db->{$b}->{name} || 'Anonymous';
+	$max_l    = length($b) if $max_l < length($b);
+      }
+
+    my $fmt = sprintf("%%-%ds %%s\n", $max_l + 2);
+
+    printf $fmt, "Tag", "Board Name";
+    foreach my $b (sort keys %name)
+      {
+	printf $fmt, $b, $name{$b};
+      }
+  }
+
+
+# dump arbitrary data with a title
+sub dump_data
+  {
+    my ($title, $data) = @_;
+
+    print "# $title\n", Dump($data);
+  }
+
+__END__
+
+=head1 NAME
+ 
+ard-parse-boards - Read data from the Arduino boards.txt file
+  
+=head1 USAGE
+ 
+    Dump all the data in the file:
+    $ ard-parse-boards --dump
+
+    See which boards we know about:
+    $ ard-parse-boards --boards
+
+    Look for a particular board...
+    $ ard-parse-boards --find uno
+
+    ...multiple terms are implicitly ANDed:
+    $ ard-parse-boards --find duemil 328
+
+    Dump all the data for a particular board:
+    $ ard-parse-boards atmega328
+
+    Extract a particular field:
+    $ ard-parse-boards atmega328 build.f_cpu
+ 
+=head1 DESCRIPTION
+
+The Arduino software package ships with a boards.txt file which tells
+the Arduino IDE details about particular hardware. So when the user
+says he's got a shiny new Arduino Uno, boards.txt knows that it has a
+16MHz ATmega328 on it. It would be nice to access these data from the
+command line too.
+
+In normal operation you simply specify the tag given to the board in
+the boards.txt file, and optionally a field name. This program then
+extracts the data to STDOUT.
+
+Most boards have names which are quite unwieldy, so we always refer to
+a board by a tag, not its name. Strictly the tag is the bit before the
+first dot in the boards.txt key. You can see a list of board tags and
+names with the C<--boards> option.
+
+=head1 OPTIONS
+
+=over
+
+=item --boards_txt=[file]
+
+Specify the full path to the boards.txt file.
+
+=back
+ 
+The following options all disable the normal 'lookup' operation.
+
+=over
+
+=item --dump 
+
+Dump the complete database in YAML format.
+
+=item ---boards
+
+Print a list of the tag and name of every board in the file.
+
+=item --find [query] <query> ...
+
+Find matching data. Strictly, return a list of values which match all
+of the query terms, treating each term as a case-insensitive regexp.
+
+For example:
+
+=over
+
+=item --find 328
+
+List data containing 328 (anywhere in the value).
+
+=item --find due
+
+List data containing 'due' (e.g. duemilanove).
+
+=item --find 328 due
+
+List data containing both 328 and due.
+
+=back
+
+=back
+ 
+=head1 BUGS AND LIMITATIONS
+
+There are no known bugs in this application.
+
+Please report problems to the author.
+
+Patches are welcome.
+ 
+=head1 AUTHOR
+
+Martin Oldfield, ex-atelier@mjo.tc
+
+Thanks to Mark Sproul who suggested doing something like this to me ages ago.
+ 
+=head1 LICENCE AND COPYRIGHT
+ 
+Copyright (c) 2011, Martin Oldfield. All rights reserved.
+ 
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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. 
+
+

arduino-mk/licence.txt

@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
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+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
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+
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+That's all there is to it!

examples/Blink/Blink.ino

@@ -0,0 +1,19 @@
+/*
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+ 
+  This example code is in the public domain.
+ */
+
+void setup() {                
+  // initialize the digital pin as an output.
+  // Pin 13 has an LED connected on most Arduino boards:
+  pinMode(13, OUTPUT);     
+}
+
+void loop() {
+  digitalWrite(13, HIGH);   // set the LED on
+  delay(1000);              // wait for a second
+  digitalWrite(13, LOW);    // set the LED off
+  delay(1000);              // wait for a second
+}

examples/Blink/Makefile

@@ -0,0 +1,10 @@
+ARDUINO_DIR = /Applications/Arduino.app/Contents/Resources/Java
+PARSE_BOARD = ../../arduino-mk/ard-parse-boards
+
+BOARD_TAG    = uno
+ARDUINO_PORT = /dev/cu.usb*
+
+ARDUINO_LIBS = 
+
+include ../../arduino-mk/Arduino.mk
+

examples/Blink/build-cli/Blink.cpp

@@ -0,0 +1,20 @@
+#include <Arduino.h>
+/*
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+ 
+  This example code is in the public domain.
+ */
+
+void setup() {                
+  // initialize the digital pin as an output.
+  // Pin 13 has an LED connected on most Arduino boards:
+  pinMode(13, OUTPUT);     
+}
+
+void loop() {
+  digitalWrite(13, HIGH);   // set the LED on
+  delay(1000);              // wait for a second
+  digitalWrite(13, LOW);    // set the LED off
+  delay(1000);              // wait for a second
+}

examples/Blink/build-cli/Blink.d

@@ -0,0 +1,11 @@
+build-cli/Blink.o: build-cli/Blink.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/Blink/build-cli/Blink.hex

@@ -0,0 +1,66 @@
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examples/Blink/build-cli/depends.mk

@@ -0,0 +1,11 @@
+build-cli/Blink.o: build-cli/Blink.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/BlinkWithoutDelay/BlinkWithoutDelay.ino

@@ -0,0 +1,65 @@
+/* Blink without Delay
+ 
+ Turns on and off a light emitting diode(LED) connected to a digital  
+ pin, without using the delay() function.  This means that other code
+ can run at the same time without being interrupted by the LED code.
+ 
+ The circuit:
+ * LED attached from pin 13 to ground.
+ * Note: on most Arduinos, there is already an LED on the board
+ that's attached to pin 13, so no hardware is needed for this example.
+ 
+ 
+ created 2005
+ by David A. Mellis
+ modified 8 Feb 2010
+ by Paul Stoffregen
+ 
+ This example code is in the public domain.
+
+ 
+ http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
+ */
+
+// constants won't change. Used here to 
+// set pin numbers:
+const int ledPin =  13;      // the number of the LED pin
+
+// Variables will change:
+int ledState = LOW;             // ledState used to set the LED
+long previousMillis = 0;        // will store last time LED was updated
+
+// the follow variables is a long because the time, measured in miliseconds,
+// will quickly become a bigger number than can be stored in an int.
+long interval = 1000;           // interval at which to blink (milliseconds)
+
+void setup() {
+  // set the digital pin as output:
+  pinMode(ledPin, OUTPUT);      
+}
+
+void loop()
+{
+  // here is where you'd put code that needs to be running all the time.
+
+  // check to see if it's time to blink the LED; that is, if the 
+  // difference between the current time and last time you blinked 
+  // the LED is bigger than the interval at which you want to 
+  // blink the LED.
+  unsigned long currentMillis = millis();
+ 
+  if(currentMillis - previousMillis > interval) {
+    // save the last time you blinked the LED 
+    previousMillis = currentMillis;   
+
+    // if the LED is off turn it on and vice-versa:
+    if (ledState == LOW)
+      ledState = HIGH;
+    else
+      ledState = LOW;
+
+    // set the LED with the ledState of the variable:
+    digitalWrite(ledPin, ledState);
+  }
+}
+

examples/BlinkWithoutDelay/Makefile

@@ -0,0 +1,9 @@
+ARDUINO_DIR = /Applications/Arduino.app/Contents/Resources/Java
+PARSE_BOARD = ../../arduino-mk/ard-parse-boards
+
+BOARD_TAG    = uno
+ARDUINO_PORT = /dev/cu.usb*
+
+ARDUINO_LIBS = 
+
+include ../../arduino-mk/Arduino.mk

examples/BlinkWithoutDelay/build-cli/BlinkWithoutDelay.cpp

@@ -0,0 +1,66 @@
+#include <Arduino.h>
+/* Blink without Delay
+ 
+ Turns on and off a light emitting diode(LED) connected to a digital  
+ pin, without using the delay() function.  This means that other code
+ can run at the same time without being interrupted by the LED code.
+ 
+ The circuit:
+ * LED attached from pin 13 to ground.
+ * Note: on most Arduinos, there is already an LED on the board
+ that's attached to pin 13, so no hardware is needed for this example.
+ 
+ 
+ created 2005
+ by David A. Mellis
+ modified 8 Feb 2010
+ by Paul Stoffregen
+ 
+ This example code is in the public domain.
+
+ 
+ http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
+ */
+
+// constants won't change. Used here to 
+// set pin numbers:
+const int ledPin =  13;      // the number of the LED pin
+
+// Variables will change:
+int ledState = LOW;             // ledState used to set the LED
+long previousMillis = 0;        // will store last time LED was updated
+
+// the follow variables is a long because the time, measured in miliseconds,
+// will quickly become a bigger number than can be stored in an int.
+long interval = 1000;           // interval at which to blink (milliseconds)
+
+void setup() {
+  // set the digital pin as output:
+  pinMode(ledPin, OUTPUT);      
+}
+
+void loop()
+{
+  // here is where you'd put code that needs to be running all the time.
+
+  // check to see if it's time to blink the LED; that is, if the 
+  // difference between the current time and last time you blinked 
+  // the LED is bigger than the interval at which you want to 
+  // blink the LED.
+  unsigned long currentMillis = millis();
+ 
+  if(currentMillis - previousMillis > interval) {
+    // save the last time you blinked the LED 
+    previousMillis = currentMillis;   
+
+    // if the LED is off turn it on and vice-versa:
+    if (ledState == LOW)
+      ledState = HIGH;
+    else
+      ledState = LOW;
+
+    // set the LED with the ledState of the variable:
+    digitalWrite(ledPin, ledState);
+  }
+}
+

examples/BlinkWithoutDelay/build-cli/BlinkWithoutDelay.d

@@ -0,0 +1,11 @@
+build-cli/BlinkWithoutDelay.o: build-cli/BlinkWithoutDelay.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/BlinkWithoutDelay/build-cli/BlinkWithoutDelay.hex

@@ -0,0 +1,64 @@
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examples/BlinkWithoutDelay/build-cli/depends.mk

@@ -0,0 +1,11 @@
+build-cli/BlinkWithoutDelay.o: build-cli/BlinkWithoutDelay.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/Fade/Fade.ino

@@ -0,0 +1,31 @@
+/*
+ Fade
+ 
+ This example shows how to fade an LED on pin 9
+ using the analogWrite() function.
+ 
+ This example code is in the public domain.
+ 
+ */
+int brightness = 0;    // how bright the LED is
+int fadeAmount = 5;    // how many points to fade the LED by
+
+void setup()  { 
+  // declare pin 9 to be an output:
+  pinMode(9, OUTPUT);
+} 
+
+void loop()  { 
+  // set the brightness of pin 9:
+  analogWrite(9, brightness);    
+
+  // change the brightness for next time through the loop:
+  brightness = brightness + fadeAmount;
+
+  // reverse the direction of the fading at the ends of the fade: 
+  if (brightness == 0 || brightness == 255) {
+    fadeAmount = -fadeAmount ; 
+  }     
+  // wait for 30 milliseconds to see the dimming effect    
+  delay(30);                            
+}

examples/Fade/Makefile

@@ -0,0 +1,9 @@
+ARDUINO_DIR = /Applications/Arduino.app/Contents/Resources/Java
+PARSE_BOARD = ../../arduino-mk/ard-parse-boards
+
+BOARD_TAG    = uno
+ARDUINO_PORT = /dev/cu.usb*
+
+ARDUINO_LIBS = 
+
+include ../../arduino-mk/Arduino.mk

examples/Fade/build-cli/Fade.cpp

@@ -0,0 +1,32 @@
+#include <Arduino.h>
+/*
+ Fade
+ 
+ This example shows how to fade an LED on pin 9
+ using the analogWrite() function.
+ 
+ This example code is in the public domain.
+ 
+ */
+int brightness = 0;    // how bright the LED is
+int fadeAmount = 5;    // how many points to fade the LED by
+
+void setup()  { 
+  // declare pin 9 to be an output:
+  pinMode(9, OUTPUT);
+} 
+
+void loop()  { 
+  // set the brightness of pin 9:
+  analogWrite(9, brightness);    
+
+  // change the brightness for next time through the loop:
+  brightness = brightness + fadeAmount;
+
+  // reverse the direction of the fading at the ends of the fade: 
+  if (brightness == 0 || brightness == 255) {
+    fadeAmount = -fadeAmount ; 
+  }     
+  // wait for 30 milliseconds to see the dimming effect    
+  delay(30);                            
+}

examples/Fade/build-cli/Fade.d

@@ -0,0 +1,11 @@
+build-cli/Fade.o: build-cli/Fade.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/Fade/build-cli/Fade.hex

@@ -0,0 +1,81 @@
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examples/Fade/build-cli/depends.mk

@@ -0,0 +1,11 @@
+build-cli/Fade.o: build-cli/Fade.cpp \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Arduino.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/binary.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WCharacter.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/WString.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/HardwareSerial.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Stream.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Print.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/Printable.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino/new.h \
+  /Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard/pins_arduino.h

examples/HelloWorld/HelloWorld.ino

@@ -0,0 +1,58 @@
+/*
+  LiquidCrystal Library - Hello World
+ 
+ Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
+ library works with all LCD displays that are compatible with the 
+ Hitachi HD44780 driver. There are many of them out there, and you
+ can usually tell them by the 16-pin interface.
+ 
+ This sketch prints "Hello World!" to the LCD
+ and shows the time.
+ 
+  The circuit:
+ * LCD RS pin to digital pin 12
+ * LCD Enable pin to digital pin 11
+ * LCD D4 pin to digital pin 5
+ * LCD D5 pin to digital pin 4
+ * LCD D6 pin to digital pin 3
+ * LCD D7 pin to digital pin 2
+ * LCD R/W pin to ground
+ * 10K resistor:
+ * ends to +5V and ground
+ * wiper to LCD VO pin (pin 3)
+ 
+ Library originally added 18 Apr 2008
+ by David A. Mellis
+ library modified 5 Jul 2009
+ by Limor Fried (http://www.ladyada.net)
+ example added 9 Jul 2009
+ by Tom Igoe
+ modified 22 Nov 2010
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+
+ http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ */
+
+// include the library code:
+#include <LiquidCrystal.h>
+
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
+
+void setup() {
+  // set up the LCD's number of columns and rows: 
+  lcd.begin(16, 2);
+  // Print a message to the LCD.
+  lcd.print("hello, world!");
+}
+
+void loop() {
+  // set the cursor to column 0, line 1
+  // (note: line 1 is the second row, since counting begins with 0):
+  lcd.setCursor(0, 1);
+  // print the number of seconds since reset:
+  lcd.print(millis()/1000);
+}
+

examples/HelloWorld/Makefile

@@ -0,0 +1,9 @@
+ARDUINO_DIR = /Applications/Arduino.app/Contents/Resources/Java
+PARSE_BOARD = ../../arduino-mk/ard-parse-boards
+
+BOARD_TAG    = uno
+ARDUINO_PORT = /dev/cu.usb*
+
+ARDUINO_LIBS = LiquidCrystal
+
+include ../../arduino-mk/Arduino.mk

examples/HelloWorld/build-cli/HelloWorld.cpp

@@ -0,0 +1,59 @@
+#include <Arduino.h>
+/*
+  LiquidCrystal Library - Hello World
+ 
+ Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
+ library works with all LCD displays that are compatible with the 
+ Hitachi HD44780 driver. There are many of them out there, and you
+ can usually tell them by the 16-pin interface.
+ 
+ This sketch prints "Hello World!" to the LCD
+ and shows the time.
+ 
+  The circuit:
+ * LCD RS pin to digital pin 12
+ * LCD Enable pin to digital pin 11
+ * LCD D4 pin to digital pin 5
+ * LCD D5 pin to digital pin 4
+ * LCD D6 pin to digital pin 3
+ * LCD D7 pin to digital pin 2
+ * LCD R/W pin to ground
+ * 10K resistor:
+ * ends to +5V and ground
+ * wiper to LCD VO pin (pin 3)
+ 
+ Library originally added 18 Apr 2008
+ by David A. Mellis
+ library modified 5 Jul 2009
+ by Limor Fried (http://www.ladyada.net)
+ example added 9 Jul 2009
+ by Tom Igoe
+ modified 22 Nov 2010
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+
+ http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ */
+
+// include the library code:
+#include <LiquidCrystal.h>
+
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
+
+void setup() {
+  // set up the LCD's number of columns and rows: 
+  lcd.begin(16, 2);
+  // Print a message to the LCD.
+  lcd.print("hello, world!");
+}
+
+void loop() {
+  // set the cursor to column 0, line 1
+  // (note: line 1 is the second row, since counting begins with 0):
+  lcd.setCursor(0, 1);
+  // print the number of seconds since reset:
+  lcd.print(millis()/1000);
+}
+