Aphasia Development Tutorial
From Openmoko
Contents |
Installation
OpenWrt
Aphasia sits on the OpenWrt platform. It's very configurable, and light on system resources. There's a great forum at [1]
Go to OpenWrt, section Build custom image and follow the instructions. When you are at the point Configure target and packages you have to do some choises. Here is the minimum installation for Aphasia:
make menuconf OpenWrt Kamikaze (r16871) Configuration Target System (Samsung S3C24xx [2.6]) ---> Samsung S3C24xx [2.6] Target Profile (Openmoko GTA-02 (minimal)) ---> Openmoko GTA-02 (minimal) [*] Image configuration ---> (192.168.0.202) LAN IP Address Xorg ---> app ---> <*> xauth Xorg ---> driver ---> <*> xf86-input-tslib Xorg ---> driver ---> <*> xf86-video-glamo Xorg ---> font ---> <*> dejavu-fonts-ttf Network ---> <*> gpsd Network ---> <*> ser2net Phone ---> <*> freerunner-alsa-scenarios Utilities ---> <*> alsa-utils Utilities ---> <*> bash Extra packages ---> <*> zoneinfo-europe Sound ---> <*> lame Sound ---> <*> madplay Languages ---> <*> erlang
Install the GUI package ex11
Take a look at this example of what you can do with ex11 [2] Download from http://projects.openmoko.org/frs/?group_id=59 It is sufficient if you take the file at http://projects.openmoko.org/frs/download.php/753/ex11_lib.tgz and unzip it in your source directory.
In file /root/.profile
export DISPLAY=:0
In file /etc/hosts remove . (dot) at the end of line localhost.
127.0.0.1 localhost
In file /root/.erlang
io:format("Running Erlang from root~n").
code:add_patha("/root/trunk").
I keep my erlang source in /root/trunk
Copy Xauthority from host
scp .Xauthority phone:/root
Add localhost to it with xauth
xauth add OpenWrt/unix:0 MIT-MAGIC-COOKIE-1 cfcc5ef98f9718f90154f355c0ae9f62 exit cp .Xauthority /
Runtime Environment
Include erlang VM in the boot process, simply add a line to /etc/init.d/x11 right after sleep 1:
start() {
export DISPLAY=":0"
config_load x11
Xorg $ARGS &
sleep 1 # give the xserver some time get initialized
erl -setcookie SFEWRG34AFDSGAFG35235 -name neo@192.168.0.202 -noshell -pa /root/trunk -s main start > debug.txt
}
Graphics
I'm using vector graphics to produce new widgets. Vector graphics is lightweight and programmable, easy to scale and rotate, and the Byte-Size is small. Use any vector-capable drawing application. I happen to use AutoCAD LT on Wine, but please suggest an open source alternative and I will be happy to create another small conversion program to translate the new drawing file to erlang source. If you have access to AutoCAD, take dxf2erl.erl from here
Drawing a widget in AutoCAD LT
Screencast here
Convert drawing to erlang source
Screencast here
