CM-T3530: Linux: Angstrom - Revision history

Grinberg: /* Digital Video SDK */

2013-10-29T05:51:08Z

‎Digital Video SDK

Grinberg: /* Digital Video SDK */

2013-10-28T12:49:16Z

‎Digital Video SDK

Show changes

Ilya: /* Package contents */

2011-07-10T14:57:49Z

‎Package contents

Mike at 07:53, 17 August 2010

2010-08-17T07:53:36Z

Mike at 14:21, 23 December 2009

2009-12-23T14:21:42Z

New page

== Introduction ==

The example run-time Linux filesystem image for CM-T3530 is based on Angstrom Linux 2009. The [http://www.compulab.co.il/t3530/download/t3530-linux.zip CompuLab Linux package for CM-T3530] includes ready to run NAND flash image, Linux kernel configuration and source code patches, and OpenEmbedded configuration files used to build the Angstrom Linux filesystem image.

The default Angstrom Linux image takes approximately 250 megabytes of flash space, and includes more than 1000 software packages. Among them:
* Core system
* X11 Windowing System
* Enlightment E17 desktop manager
* Firefox and Midory web browsers
* Office applications
* GIMP
* Totem, MPlayer and omapfbplay media players

The [[CM-T3530: Linux: Getting started|Getting started with Linux on CM-T3530]] page provides a brief introduction on how to install the run-time Linux image. This article describes package structure and peripheral device options specific to the CM-T3530.

== Package contents ==

=== images ===
* {{filename|Angstrom-image.ubi}} - ready to run Angstrom Linux image for installation onto CM-T3530 NAND
* {{filename|uImage-cm-t35.bin}} - kernel image binary for installation onto CM-T3530 NAND
* {{filename|Angstrom-image.tar.bz2}} - archive of root file system
* {{filename|bootscr.img}} - U-Boot script used for image installation
* {{filename|kernel.img}} - Kernel image required for NAND image installation
* {{filename|ramdisk.img}} - Ramdisk image required for NAND image installation

=== kernel ===
* {{filename|uImage-2.6.32-omap1-cm-t35.bin}} - ready to run Linux kernel 2.6.32-omap1 for CM-T3530
* {{filename|linux-2.6.32-omap1-cm-t35.defconfig}} - Linux kernel 2.6.32-omap1 configuration file
* {{filename|linux-2.6.32-omap1-cm-t35.patch}} - patch vs. [http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git Linux-omap kernel 2.6.32] with support for CM-T3530 peripherals

=== oe ===
The {{filename|oe}} directory contains configuration files and CM-T3530 specific package definition for OpenEmbedded.

* {{filename|local.conf}} - configuration file used to build Angstrom Linux image for CM-T3530. This file should be placed in {{filename|${OEBASE}/build/conf}} directory.
* {{filename|cm-t35.patch}} - CM-T3530 specific additions to OpenEmbedded.
* {{filename|base-revision}} - specifies revision of [http://cgit.openembedded.org/cgit.cgi/openembedded/log/ OpenEmbedded git tree] used as a baseline for CM-T3530 patches generation.

=== utilities ===

{{filename|utilities}} directory contains miscellaneous utilities useful for development

* {{filename|first_boot.scr}} - U-Boot script for booting kernel and ramdisk from MMC/SD card or network.
* {{filename|tftpd32.zip}} - TFTP server for Windows users

== Using Angstrom Linux on CM-T3530 ==
=== Display options ===
CM-T3530 evaluation platform has four video output interfaces: LCD, DVI, LVDS and TV-out. Default configuration of Angstrom Linux for CM-T3530 uses Toppoly LCD supplied with the evaluation kit as primary video output. It is possible to switch between LCD and DVI interfaces on the fly. TV-out can be used simultaneously with LCD or DVI interface.

Linux implementation of the OMAP3 display subsystem is described in detail in {{filename|[http://gitorious.org/linux-omap-dss2/linux/blobs/master/Documentation/arm/OMAP/DSS Documentation/arm/OMAP/DSS]}} file in the Linux kernel source tree.

==== Display resolutions ====
* The Toppoly LCD supplied with CM-T3530 evaluation kit supports 480x640 resolution with 18 bits per color
* DVI output can be configured for standard resolutions using kernel command line parameter {{parameter|omapfb.mode}}:
*: 1024x768 - omapfb.mode=dvi:1024x768-24@60
*: 800x600 - omapfb.mode=dvi:800x600-24@60
*: 640x480 - omapfb.mode=dvi:640x480-24@60
* TV-out supports PAL and NTSC standards

==== Examples ====
===== Switch from LCD to DVI =====
<pre>
mgr0=/sys/devices/platform/omapdss/manager0
lcd=/sys/devices/platform/omapdss/display0
dvi=/sys/devices/platform/omapdss/display1
fb0=/sys/class/graphics/fb0

w=`cat $dvi/timings | cut -d "," -f 2 | cut -d "/" -f 1`
h=`cat $dvi/timings | cut -d "," -f 3 | cut -d "/" -f 1`

echo "0" > $lcd/enabled
echo "" > $mgr0/display
fbset -fb /dev/fb0 -xres $w -yres $h -vxres $w -vyres $h
# at this point you have to switch the dvi/lcd dip-switch from the omap board
echo "dvi" > $mgr0/display
echo "1" > $dvi/enabled
</pre>

===== Clone GFX overlay to LCD and TV =====
<pre>
ovl0=/sys/devices/platform/omapdss/overlay0
ovl1=/sys/devices/platform/omapdss/overlay1
tv=/sys/devices/platform/omapdss/display2
fb0=/sys/class/graphics/fb0
fb1=/sys/class/graphics/fb1

w=`cat $tv/timings | cut -d "," -f 2 | cut -d "/" -f 1`
h=`cat $tv/timings | cut -d "," -f 3 | cut -d "/" -f 1`

echo "0" > $ovl0/enabled
echo "0" > $ovl1/enabled

echo "" > $fb1/overlays
echo "0,1" > $fb0/overlays

echo "$w,$h" > $ovl1/output_size
echo "tv" > $ovl1/manager

echo "1" > $ovl0/enabled
echo "1" > $ovl1/enabled

echo "1" > $tv/enabled
</pre>

===== Switch TV-out from PAL to NTSC =====
<pre>
tv=/sys/devices/platform/omapdss/display2
echo "0" $tv/enabled
echo "ntsc" $tv/timings
echo "1" $tv/enabled
</pre>

=== 3D Demos ===
Angstrom Linux for CM-T3530 includes OpenGLES libraries and 3D demos. OMAP3 3D support is limited to 16-bit colors, therefore it is necessary to ensure that display subsystem has proper color mode configuration. For example for 1024x768 resolution the {{parameter|omapfb.mode}} should be set to '''omapfb.mode=dvi:1024x768-16@60'''.

The OpenGLES demos can be found in {{filename|/usr/demos/}} directory in the target filesystem.

=== GPIO access ===
Linux provides simple and convenient GPIO access via {{filename|sysfs}} interface. A GPIO should be requested using {{filename|/sys/class/gpio/export}}. After the GPIO is exported it is possible to change its direction and value using {{filename|/sys/class/gpio/gpioX/direction}} and {{filename|/sys/class/gpio/gpioX/value}} attributes.

==== Example ====
The following example demonstrates how to configure GPIO 140 as output and produce a 1usec pulse:

<pre>
echo 140 > /sys/class/gpio/export
echo 1 > /sys/class/gpio/gpio140/direction
echo 0 > /sys/class/gpio/gpio140/value
echo 1 > /sys/class/gpio/gpio140/value
usleep 1
echo 0 > /sys/class/gpio/gpio140/value
</pre>

=== Angstrom Linux package management ===
Angstrom Linux for CM-T3530 includes {{cmd|opkg}} package manager. It can be run either from command line, or using GUI. Go to "Settings" -> "Package Manager" to start the application, select packages you'd like to install and press "Apply" button.

== See also ==
* [[CM-T3530: Linux: Getting started|Getting started with Linux on CM-T3530]]
* [[CM-T3530: Linux: Kernel|Linux kernel for CM-T3530]]
* [[CM-T3530: Linux: Booting from MMC/SD card|Booting from MMC/SD card]]
* [[CM-T3530: Linux: Building images|Building Linux images]]
* [[Linux Development for ARM modules]]
* [http://www.angstrom-distribution.org Angstrom Distribution]
* [http://www.openembedded.org OpenEmbedded]
* [http://wiki.omap.com Texas Instruments Embedded Processors Wiki]

[[Category:Linux|Angstrom]]
[[Category:CM-T3530|Linux: Angstrom]]

@@ Line 173: / Line 173: @@
 For further details, refer to the OMAP35x Technical Reference Manual.
 The Digital Video SDK (DVSDK) version [http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/dvsdk/DVSDK_4_00/4_01_00_09/index_FDS.html 4.01.00.09] provides multiple resources for evaluation and application development for the TI DM3530 platform.
-{{Note|Although it is known to work with Linux kernel version 2.6.32, it is '''NOT''' compatible with kernel version 3.0.y.}}
+{{Note|Although TI DVSDK is known to work with Linux kernel version 2.6.32, it is '''NOT''' compatible with kernel version 3.0.y.}}
 == Graphics SDK ==

@@ Line 28: / Line 28: @@
 === kernel ===
-* {{filename|uImage-2.6.32-omap1-cm-t35.bin}} - ready to run Linux kernel 2.6.32-omap1 for CM-T3530
+* {{parameter|additional_modules}} - additional modules required by CM-T3530 for video playback. Please refer the [[CM-T3530:_Linux:_Video_playback#Kernel_modules|Video modules installation guide]] for more information.
-* {{filename|linux-2.6.32-omap1-cm-t35.defconfig}} - Linux kernel 2.6.32-omap1 configuration file
+* {{parameter|first_release}} - previously released Linux kernel image, configuration files and patch for CM-T3530
-* {{filename|linux-2.6.32-omap1-cm-t35.pm.defconfig}} - Linux kernel 2.6.32-omap1 configuration file with enabled power management features
+* {{filename|uImage-2.6.32-cm-t35-3.bin}} - ready to run Linux kernel 2.6.32-cm-t35-3 for CM-T3530
-* {{filename|linux-2.6.32-omap1-cm-t35.patch}} - patch vs. [http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git  Linux-omap kernel 2.6.32] with support for CM-T3530 peripherals
+* {{filename|linux-2.6.32-cm-t35-3.defconfig}} - Linux kernel 2.6.32-cm-t35-3 configuration file
 === oe ===
@@ Line 44: / Line 46: @@
 {{filename|utilities}} directory contains miscellaneous utilities useful for development
 * {{filename|first_boot.scr}} - U-Boot script for booting kernel and ramdisk from MMC/SD card or network.
-* {{filename|tftpd32.zip}} - TFTP server for Windows users
+* {{filename|tftpd32.zip}} - TFTP server for Windows users.
-* {{filename|capture}} - simple video capture example
+* {{filename|capture}} - simple video capture example.
 == Using Angstrom Linux on CM-T3530 ==

@@ Line 15: / Line 15: @@
 == Package contents ==
 === images ===
@@ Line 27: / Line 30: @@
 * {{filename|uImage-2.6.32-omap1-cm-t35.bin}} - ready to run Linux kernel 2.6.32-omap1 for CM-T3530
 * {{filename|linux-2.6.32-omap1-cm-t35.defconfig}} - Linux kernel 2.6.32-omap1 configuration file
 * {{filename|linux-2.6.32-omap1-cm-t35.patch}} - patch vs. [http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git  Linux-omap kernel 2.6.32] with support for CM-T3530 peripherals
@@ Line 42: / Line 46: @@
 * {{filename|first_boot.scr}} - U-Boot script for booting kernel and ramdisk from MMC/SD card or network.
 * {{filename|tftpd32.zip}} - TFTP server for Windows users
 == Using Angstrom Linux on CM-T3530 ==
@@ Line 114: / Line 119: @@
 The OpenGLES demos can be found in {{filename|/usr/demos/}} directory in the target filesystem.
 === GPIO access ===
@@ Line 132: / Line 141: @@
 === Angstrom Linux package management ===
 Angstrom Linux for CM-T3530 includes {{cmd|opkg}} package manager. It can be run either from command line, or using GUI. Go to "Settings" -> "Package Manager" to start the application, select packages you'd like to install and press "Apply" button.
 == See also ==