COM iMX25 Linux: Difference between revisions

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* [[media:Linux-2.6.38_DHCOM_iMX25_kernel.zip|Current built of the 2.6.38 DHCOM iMX25 linux kernel (2011-09-22)]]
* [[media:Linux-2.6.38_DHCOM_iMX25_kernel.zip|Current built of the 2.6.38 DHCOM iMX25 linux kernel (2011-09-22)]]


  1. Copy the "uImage" and "uImage.env" file onto a SD-card with a FAT file system
  1. Copy the "uImage" and "uImage.env" file onto a microSD card with a FAT file system
  2. Insert the SD-card and start the system
  2. Insert the microSD card and start the system
  3. Go to the U-Boot console by pressing <Return> on a RS232 terminal (during startup)
  3. Go to the U-Boot console by pressing <Return> on a RS232 terminal (during startup)
  4. $ update linux
  4. $ update linux
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* [http://dl.dropbox.com/u/19433555/rootFS_DN_20110805ext4_HL2%20%2808.12.2011%29.tar.bz2 Current Debian root file system (2011-12-08)]
* [http://dl.dropbox.com/u/19433555/rootFS_DN_20110805ext4_HL2%20%2808.12.2011%29.tar.bz2 Current Debian root file system (2011-12-08)]


  1. Format a SD-card with ext3 file system e.g. you can use palimpsest
  1. Format a microSD card like following (in linux e.g. you can use palimpsest)
     $ palimpsest
    MBR partition scheme
  2. Copy root file system onto the SD-card
    P1 FAT  (100MB)
     P2 ext3 (residual space)
  2. Copy root file system onto the ext3 partition of the microSD card
     Start the Console on Linux
     Start the Console on Linux
     $ su
     $ su
     $ chmod 755 /path/of/the/SD-card
     $ chmod 755 /path/of/the/microSD card
     $ cd /path/of/the/SD-card
     $ cd /path/of/the/microSD card
     $ tar xfjv Name_of_RootFS_file.tar.bz2
     $ tar xfjv Name_of_RootFS_file.tar.bz2
==<br/>How to control the display brightness ==
$ echo <value> >/sys/class/leds/pwm:out/brightness
value range: 0..255


==<br/>Debian system ==
==<br/>Debian system ==

Revision as of 13:01, 18 January 2012


FAQ


Linux virtual machine for development

Get the Virtual machine

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:

How to build a kernel:

1. Start the Console on Linux
2. $ tar xfjv linux-2.6.38.tar.bz2
3. $ cd /kernel/path
4. $ patch -p1 <linux-2.6.38_DHCOM_iMX25.patch
5. $ cp .config /kernel/path
6. $ 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 with U-Boot

You can update the linux kernel with U-Boot flash update. 

1. Copy the "uImage" and "uImage.env" file onto a microSD card with a FAT file system
2. Insert the microSD card and start the system
3. Go to the U-Boot console by pressing <Return> on a RS232 terminal (during startup)
4. $ update linux


How to use/update our root file system

1. Format a microSD card like following (in linux e.g. you can use palimpsest)
   MBR partition scheme
   P1 FAT  (100MB)
   P2 ext3 (residual space)
2. Copy root file system onto the ext3 partition of the microSD card
   Start the Console on Linux
   $ su
   $ chmod 755 /path/of/the/microSD card
   $ cd /path/of/the/microSD card
   $ tar xfjv Name_of_RootFS_file.tar.bz2


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

Login:
  Name:     root
  password: foo

Shutdown:
  $ 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

Login:
  Name:     root
  password: n/a

Shutdown:
  $ halt
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