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#                     Arduino Project's Skeleton                     #
# Written by: Paulo H. "Taka" Torrens <paulo_torrens@hotmail.com>    #
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1 - About
This is an Arduino makefile, an alternative to the current IDE, which
I made in hope to help the Arduino community.
It will build your source code and any library you want to use with
it. I've also created a quite simple Serial.printf(const char *, ...),
it currently only works with %d and %s, but better than nothing.
It is in the file ./lib/default/Print.cpp, if you want to see it.

You may use this for any porpuse, and edit as you want. This code is
released under the GPL license. It is not needed at all, but it would
be apreciated if you comment you used my software, or just send me an
e-mail with thanks. =D

Enjoy, folks.

2 - Directory Structure
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# ./                # Project's root directory                       #
# ./Makefile        # The project Makefile                           #
# ./scripts         # Scripts' directory                             #
# ---------/make.rb # The Makefile generator script                  #
# ---------/size.rb # Size verifier script                           #
# ---------/...     # Project's remaining scripts                    #
# ./lib             # Libraries' directory                           #
# -----/...         # Library "x" directory                          #
# -----/.../...     # Library "x" source files (scanned recursively) #
# ./src             # Project's source directory                     #
# -----/...         # Project's source files (scanned recursively)   #
# ./include         # Project's headers directory                    #
# ---------/...     # Project's headers (scanned recursively)        #
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3 - The Output
The output files will be all the libraries *.a files, the binary
"project.elf" file, which is converted to "project.hex". This final
file is then uploaded by running "make upload".

4 - Makefile
The Makefile is automatically generated every time a modification to
some directory, to the Makefile and to the generator itself (so it is
useless to edit it, as it will be recreated).
It is created by scripts/make.rb, and uses scripts/size.rb to check
the size of the final program.
The generator will create all the libraries and the program itself,
scanning the folders recursivelly.
Some rules:
"make": 
  will generate the final file, "project.hex". It will
  recreate the Makefile itself if necessary.
"make upload": 
  generates the file (if not generated yet) and
  then uploads it to the Arduino board. It is not necessary to
  call "make" before it, because it checks if the final file is
  up to date before doing the upload itself. It will also check the
  binary size.
  The default port is /dev/tty0, to change the number you can, e.g.,
  call "make USB=1" to use /dev/tty1 instead.
"make clean": deletes all the files created by the project (i.e.,
  all the *.o files, *.a libraries, the "project.elf" and the "project.hex".

5 - Libraries
  Libraries may be reused in another project. Each directory inside
the "lib" directory is considered a different library (e.g., the
"default" directory will generate the library default.a, with all the
source codes it may find inside lib/default (scanning recursivelly).
  To create a new lib, e.g., "foo", create a directory foo in the
"lib" directory, and populate it with *.c or *.cpp files. The
Makefile will be automatically recreated and the library rule will
have been made, and a foo.a file will appear (and will be added to
the final executable).