COM iMX25 Linux

Virtual machine for development

Get the VM

• Get the VMware player

• Debian Squeeze VMware Image (zipx Archiv) Passwords: devel:devel / root:root

History:

v1.1 - Debian Squeeze v1.1.zipx    - Update Eclipse to Indigo with CDT 8.0
                                   - Add demo project "crosshelloworld"

v1.0 - Debian Squeeze.zipx         - First release

Setting up a Eclipse Cross Executable Project:

• Use Eclipse Indigo (version 3.7.1) for your project.
• Create a new C++ Project and choose as Executable Project type "Cross-Compile Project" and as Toolchains "Cross GCC"
• Click the Button "Next" and specify under "Tool command path" the Toolchain path. For Codesourcery it is the folder "CodeSourcery/Sourcery_G++_Lite/bin". Under Prefix type "arm-none-linux-gnueabi-".

Building your own Kernel

Sources for the iMX25 Kernel:

• Kernel version: 2.6.38

• Patch to DHCOM iMX25 Linux (2011-09-22)

• Kernel configuration for DHCOM iMX25 Linux (2011-09-22)

How to build a kernel:

1. tar xfjv linux-2.6.38.tar.bz2
2. cd /kernel/path
3. patch -p1 <linux-2.6.38_DHCOM_iMX25.patch
4. cp .config /kernel/path
5. ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- make uImage

The uImage file will you find in ../build-linux/arch/arm/boot

Update the Kernel

• Current built of the 2.6.38 DHCOM iMX25 linux kernel (2011-09-22)

1. Go to the U-Boot console by pressing <Return> on a RS232 terminal (during startup)
2. update linux

How to use our root file system

1. Format a SD card with ext3 file system (you can use palimpsest)
2. Copy root file system onto the SD card
   -Start terminal 
   -su
   -chmod 755 /directory/of/the/SD-card
   -cd /directory/of/the/SD-card
   -tar jxvf rootFS_file.tar.bz2

How to control the display brightness

echo <value> >/sys/class/leds/pwm:out/brightness

value range: 0..255

Debian system

Calibrating the touchscreen

TSLIB_TSDEVICE=/dev/input/event0 ts_calibrate

Running example Qt Apps

QWS_MOUSE_PROTO=Tslib:/dev/input/event0 /usr/qt/demos/demoname/demoname -qws
For the Qt-Browser change demoname to browser

Login/Shutdown system

Name:     root
password: foo

shutdown -h now

Busybox system

Calibrating the touchscreen

TSLIB_TSDEVICE=/dev/event0 ts_calibrate

Running example Qt Apps

QWS_MOUSE_PROTO=Tslib:/dev/event0 /usr/qt/demos/demoname/demoname -qws
For the Qt-Browser change demoname to browser

Login/Shutdown system

Name: root

halt