# Arduinosferatu

Months ago, I bought an Arduino. It comes with a nice ide but I always used it under Windows. This summer I decided to stop using Windows and I haven’t played with the Arduino since then.

Some days ago I purchased some stuffs from Sparkfun (some dataflash, resistors, etc…) in order to make some kind of backup device for the pc-engine. So I decided to install the Arduino softwares on my box. I’m currently running a Fedora core 7 for amd64. There are instructions for Fedora core 6 on Arduino site. But as I’m running on an amd64 I had to recompile some stuffs.

1. Java
There’s no official package for sun’s java on Fedora. Just follow the instructions from Jan K. Labanowski of the Computational Chemistry List, Ltd and you are done in less than 10 minutes.

2. AVR tools
It’s the easiest part. Fedora core 7 includes all you need. You’ll have to install the following packages:

• avr-binutils.x86_64
• avr-gcc.x86_64
• avr-libc.noarch
• avr-gcc-c++.x86_64
• avr-libc-docs.noarch
• avr-gdb.x86_64
• avrdude.x86_64

3. RXTX
Arduino comes with a precompiled version of RXTX. Unfortunately it’s a 32bits version. You’ll have to recompile it or you’ll have some nasty messages when trying to run Arduino. Well, it won’t crash immediately. You’ll be able to set the program directory. But once you press OK, it will crash and you’ll get a nice error message.
After trying to compile the CVS version of RXTX, I went for a release vesion. The latest one is 2.1-7r2. According to the INSTALL file, all I had to do was the standard “./configure; make; make install” combo.

Unfortunatelly, the kernel headers test from the configure script failed. It’s trying to compile some piece of C code but. Here’s the error : error: 'UTS_RELEASE' undeclared (first use in this function) It seems that all distros are patching RXTX to remove the use of this variable. In fact it’s only used for a sanity check. If the current kernel version is different from the one RXTX was compiled for it will prompt some error message. If you really want to use it you’ll have to add the right header in the configure script (check_kernel_headers) and some various C files.

I went the dirty way and simply removed it. Hopefully there’s a patch from the nslu2-linux project which will do the work for you on the sources. But you’ll still have to remove the check_kernel_headers() from the configure script.

But that’s not the end of your problems! make install won’t work. You’ll have the following error :
 make all-am make[1]: Entering directory //rxtx-2.1-7r2' make[1]: Nothing to be done for all-am'. make[1]: Leaving directory //rxtx-2.1-7r2' libtool: install: x86_64-unknown-linux-gnu/librxtxRS485.la' is not a directory Try libtool --help --mode=install' for more information. make: *** [install] Error 1
Hopefully this issue is addressed in the RXTX faq.

After installing RXTX, edit /usr/java/jdk1.6.0_02/jre/lib/javax.comm.properties (create the file if it’s missing) and add the following line :
Driver=gnu.io.RXTXCommDriver

We are now ready to run the Arduino software!

4. Arduino
The latest version is Arduino 0009. Install it wherever you want. Let’s say ~/arduino. When you are done go to ~/arduino/lib. Remove RXTXcomm.jar and librxtxSerial.so. Then edit ~/arduino/arduino and modify both CLASSPATH and LD_LIBRARY_PATH to point to the directory containing RXTXcomm.jar and librxtxSerial.so. Here’s what it looks like on my system :
CLASSPATH=java/lib/rt.jar:lib:lib/build:lib/pde.jar:lib/core.jar:lib/antlr.jar:lib/oro.jar:lib/registr y.jar:lib/mrj.jar:/usr/java/jdk1.6.0_02/jre/lib/ext/RXTXcomm.jar
LD_LIBRARY_PATH=pwd/lib:\${LD_LIBRARY_PATH}:/usr/java/jdk1.6.0_02/jre/lib/amd64:/usr/lib:/usr/local/l ib

At this point we are nearly done. Don’t forget to give your user the permission to the usb device (/dev/ttyUSB0 in my case). Plug the Arduino board and launch the ide. There’ll be some gcc warnings. Don’t pay attention to them.

First set the serial port. Go to Tool > Serial Port and choose the correct interface. If you don’t know it, leave the menu and unplug the board. Go to the Serial Port menu and note the currently listed interface. Replug the board. And return to the Serial Port menu. A new usb interface may have appeared. It’s the interface the board is connected to.

You’ll have to check if the ide is set to the microcontroller. If it’s not the case when you’ll want to upload your code to board, you’ll have the following error:
avrdude: Expected signature for ATMEGA168 is 1E 94 06`
Take your board and look for the chip type. You can’t miss it, it’s written on it To change the microcontroller go to Tools > Microcontroller (MCU) and choose your chip (ther’s an ATMEGA8 on my board).

At this point everything should be alright.