Revision as of 10:03, 19 May 2011

Developer's corner

Tutorials and How-Tos

Compiling the kernel for N900

• Compiling the kernel for N900

Useful tools / scripts / etc

• Bonnie++ disk IO benchmark utility

Tips and Tricks

Touching OBS for the first time

• msugano wanted to branch uxlanuch from the public OBS to his home in the community OBS.

On his local laptop:

$ osc -A https://api.pub.meego.com branch -cm "would like to experiment e.g. xsetroot right after the start_X_server() to enhance the UX." MeeGo.com:MeeGo:1.2:oss uxlaunch

• The new project was downloaded to his local environment. Now, it's possible to edit the source.
• The new project was created in the community OBS under msugano's home (Build Service > Projects > home:msugano:branches:MeeGo.com:MeeGo:1.2:oss > uxlaunch).
• However, the above project page says The project this package belongs to currently has no build targets defined.
• Hence, msugano clicked on the "build targets" to specify, but could not find any target build that looked relevant for the DE. (lbt fixed this => thanks)
• Then msugano received the advice to use the command line instead. (The following is not needed any more, since webui now works, but anyway FYI).

$ osc meta prj Project:DE:Trunk:Testing (copy the below)

 <repository name="standard">
   <path repository="standard" project="Project:DE:MeeGo:1.2"/>
   <arch>armv8el</arch>
   <arch>i586</arch>
 </repository>

$ osc meta prj -e home:msugano:branches:MeeGo.com:MeeGo:1.2:oss (vim starts & paste the above).

Screenshot

• How to take a screenshot?

Start widgetsgallery
Select ->debug_tools->xx_wg_take_screenshot

Command line alternative
[meego@localhost ~]$ export DISPLAY=:0 && gst-launch-0.10 ximagesrc num-buffers=1 ! ffmpegcolorspace ! pngenc ! filesink location=screenshot.png

Links

Placeholder, let's start linking relevant information 1. Download Meego kernel for N900

# git clone http://git.gitorious.org/meego-device-adaptation/n900_kernel.git n900_kernel

or use http://meego.gitorious.org/meego-device-adaptation/n900_kernel/archive-tarball/master to download manually

2. Compiling Meego Kernel

Execute following commands in command prompt

# export ARCH=arm
# export CROSS_COMPILE=arm-none-linux-gnueabi-

Note: You should have arm tool chain in your host machine

Enabling CAIF Protocol support for ST Ericsson Modems (or do whatever changes you need for the kernel)

# make omap2plus_defconfig
# make menuconfig  ( Note: select caif protocol support in Networking and driver sections)

Do kernel modifications here!

# make zImage
# make modules
# make modules_install INSTALL_MOD_PATH=$path to install modules

Finally kernel images available @ $Meego_kernel_source/arch/arm/boot/zImage

3. Copy modules to N900 device ( Note: Already device should have meego os)

1. scp -r $meego_compiled_modules_installed_path root@192.168.2.15:/

Note: connect device with host via usb cable before executing this command

4. Loading Compiled Meego kernel

Download flasher from http://tablets-dev.nokia.com/maemo-dev-env-downloads.php?f=maemo_flasher-3.5_2.5.2.2.tar.gz

Load Kernel using

# sudo ./flasher-3.5  -l -k  $Meego_kernel_source/arch/arm/boot/zImage	 -b

Note: Before executing this command,please power off the device.

Now connect USB cable with device. You will see Meego home screen after 2 or 3 minuteson this page.