<code python>
#
# Copyright 2010 by Adam Mayer	 <adam@makerbot.com>
#
# This program 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.
#
# 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.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>
#

#
# HOW TO USE THIS BUILD SCRIPT
#
# By default, this script will build the firmware for an atmega644p-based motherboard.
# The firmware will be built, but not uploaded.
#
# To build for another platform, pass an explicit platform parameter.  For example,
# $ scons platform=rrmbv12
# $ scons platform=rrmbv22
#
# To upload the firmware, specify the "upload" target.  By default, this will use
# /dev/ttyUSB0 as the serial connection.
# $ scons upload
#
# If you want to select a port manually, specify it as a parameter:
# $ scons port=/dev/ttyUSB3 upload
#

import os
import re
from os.path import dirname
# Parameters
platform = ARGUMENTS.get('platform','rrmbv12')
f_cpu='16000000L'

default_baud = '19200'
mcu='atmega168'
has_queue = 0
has_psu = 0

def extract_version(f):
	regex = re.compile(r"const uint16_t firmware_version = ([0-9]+);")
	for line in f.get_contents().split('\n'):
		mo = regex.match(line)
		if mo:
			return int(mo.group(1))
	return 0

version = extract_version(File('#/src/Motherboard/Version.hh'))

if (platform == 'rrmbv12'):
	default_baud = '38400'
	mcu='atmega644p'
	has_queue = 1
	has_psu = 1
elif (platform == 'rrmbv22'):
	default_baud = '57600'
	mcu='atmega1280'
	has_queue = 1
	has_psu = 0
else:
	print "Platform "+platform+" is not currently supported.\n"
	exit()

target_name = "MB-"+platform+"-v"+str(version/100)+"."+str(version%100)

upload_port = ARGUMENTS.get('port','/dev/ttyUSB0')
upload_baud = ARGUMENTS.get('baud',default_baud)
upload_prog = ARGUMENTS.get('programmer','stk500v1')

srcs = Glob('*.cc') + Glob('lib_sd/*.c') + Glob('boards/%s/*.cc' % platform) + Glob('#/src/shared/*.cc')

include_paths = ['#/src/shared', 'boards/%s' % platform, '.']

flags=[
	'-DF_CPU='+str(f_cpu),
	'-mmcu='+mcu,
	'-g',
	'-Os',
	'-w',
	'-fno-exceptions',
	'-ffunction-sections',
	'-fdata-sections']

if (os.environ.has_key('AVR_TOOLS_PATH')):
	avr_tools_path = os.environ['AVR_TOOLS_PATH']
else:
	avr_tools_path = dirname(os.popen('/usr/bin/which avr-gcc').readlines()[0])

env=Environment(CC=avr_tools_path+"/avr-g++",
	CXX=avr_tools_path+"/avr-g++",
	CPPPATH=include_paths,
	CCFLAGS=flags)
objs = env.Object(srcs)

# run_alias = Alias('run', [program], program[0].path)
# AlwaysBuild(run_alias)

hex_name = target_name + '.hex'
elf_name = target_name + '.elf'

env.Append(BUILDERS={'Elf':Builder(action=avr_tools_path+"/avr-gcc -mmcu="+mcu+" -Os -Wl,--gc-sections -o $TARGET $SOURCES")})
env.Append(BUILDERS={'Hex':Builder(action=avr_tools_path+"/avr-objcopy -O ihex -R .eeprom $SOURCES $TARGET")})
env.Elf(elf_name, objs) 
env.Hex(hex_name, elf_name)

avrdude = avr_tools_path+"/avrdude"
avrdude_flags = "-V -F -p "+mcu.replace("atmega","m")
avrdude_flags = avrdude_flags + " -P "+upload_port
avrdude_flags = avrdude_flags + " -c "+upload_prog
avrdude_flags = avrdude_flags + " -b "+upload_baud
avrdude_command = " ".join([avrdude,avrdude_flags,"-U","flash:w:$SOURCES"])

# env.Alias instead of just Alias because of
# http://scons.tigris.org/issues/show_bug.cgi?id=2443
upload_alias = env.Alias('upload', hex_name, avrdude_command)
AlwaysBuild(upload_alias)
</code>
<code python>
avr = Environment()
 
Target="main"
mcu="atmega128"
F_CPU=16e6
 
# Add all additional source files to compile
src=""" obj/utils.c
        obj/usart.c
        obj/usart1.c"""
 
# Add Source Path here
cpppath=""" .
            ../../EP-gcc-lib"""
 
# Optimization level, can be [0, 1, 2, 3, s].
# 0 = turn off optimization. s = optimize for size.
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
opt = "s"
 
# Add Additional Compiler Flags
flags=""" """
 
# Add Variant Dirs
avr.VariantDir('obj', '../../EP-gcc-lib')
 
 
# Set Environment Parameters
avr['CC'] = "avr-gcc -mmcu=%s" % mcu
avr.Append(CPPPATH = Split(cpppath))
avr.Append(CCFLAGS = "-O%s" % opt)
avr.Append(CCFLAGS = "-Wall" )
avr.Append(CCFLAGS = "-DF_CPU=%i" % F_CPU)
avr.Append(CCFLAGS = Split(flags))
 
# Execute AVR-GCC
avr.Program(Target+".elf", Split(Target+".c " + src))
 
avr.Command(Target+".hex", Target+".elf", "avr-objcopy -j .text -j .data -O ihex $SOURCE $TARGET")
# Show memory usage
avr.Command(None, Target+".elf", "avr-size $SOURCE")
</code>
또다른 avr 환경설정
<code python>
env.Append(CPPDEFINES = {'ARCH_AVR' : 1})
env.Append(CCFLAGS = '-mmcu=atmega128')
env.Append(LINKFLAGS = '-mmcu=atmega128')

env['CC'] = 'avr-gcc'
env['RANLIB'] = 'avr-ranlib'
env['OBJCOPY'] = 'avr-objcopy'
env['ARCH'] = 'avr'
</code>
====== section garbage collection ======
<code>
gcc -ffunction-sections -fdata-sections 
ld --gc-sections
</code>
  *[[http://kldp.org/node/94079|kldp 관련글]]
  *[[http://lwn.net/Articles/249005|위 글에 링크된 글]]

====== vim setting ======
  *copy [[http://www.vim.org/scripts/script.php?script_id=2654|arduino.vim]] under ~/.vim/syntax/
  *link pde extention to arduino syntax
<code vi>
au BufNewFile,BufRead *.pde setl ft=arduino
</code>
====== references ======
  *[[http://www.scons.org/doc/1.2.0/HTML/scons-user/book1.html|SconsUserGuide]]
  *[[http://johanneshoff.com/arduino-command-line.html|arduino-command-line]]