Best practices for building Gtk+ applications with OpenEmbedded

I recently wrote an article about best practices building Qt applications with OpenEmbedded, and it occured to me that I should write an equivalent article for Gtk+ applications.  The same points apply — put your application source in a SCM system, and put the install logic in the application source (read the above article).  The […]

Best practices for building Qt applications with OpenEmbedded

This article describes how to cross compile a Qt application (named qt_tutorial) with OpenEmbedded, and several best practices you should consider.  OpenEmbedded currently includes fairly good support for building Qt — both Qt Embedded and Qt X11.   OE also includes a number of qt classes that make building Qt applications easy.  One of the main […]

How to capture source changes to an OpenEmbedded package

One task that is a often confusing to new OpenEmbedded users is how to capture changes to the source code for a package/recipe.  First, lets review the progression in tools use to capture source code changes. In days of yore, developers often used gnu diff to capture modifications to a source tree.  The typical practice […]

Embedded Linux versus Windows CE

Occasionally I am asked how Embedded Linux compares with Windows CE.  I have spent the past 5 years doing mostly embedded Linux development, and the previous 5 years doing mostly WinCE development with a few exceptions, so my thoughts are no doubt a little biased toward what I understand best.  So take this with a […]

Dealing with large data structures efficiently in embedded systems

I’m currently dealing with a programming problem where I need access to several 64MB, file-backed data structures concurrently on an Embedded Linux system that only has 64MB of RAM.  The data structures are fairly sparse (mostly zero data), and I typically only need to access small portions of them at any particular time.  There is […]

MontaVista Linux 6 is based on OpenEmbedded Technologies

Very interesting news from MontaVista yesterday as they announced MontaVista Linux 6.  It turns out they are using bitbake, which is the core of the OpenEmbedded build system.  Along with the adoption of OpenEmbedded in many leading Embedded Linux efforts (Beagleboard, Gumstix, Bug Labs, etc), this is a resounding affirmation that the OpenEmbedded way of […]

Wi2Wi W2CBW003 Wifi/Bluetooth module review

The Wi2Wi W2CBW003 is a highly integrated module that provides both Wifi and Bluetooth radios for embedded designs. This module is ideal for embedded designs, as it provides a lot of functionality in a small package and includes standard interfaces like SPI, SDIO and serial that connect with most embedded CPUs. With the availability of […]

Memory Performance on various Embedded Systems

Marcin just published an interesting article about memory performance on various embedded systems using the hdparm -T as a simple benchmarq.  This test gives a pretty good indicator of memory performance in the system.  From the hdparm man page: Perform timings of cache reads for benchmark and comparison purposes.  For meaningful results, this operation should […]

Who is using OpenEmbedded?

Having used OpenEmbedded for a number of Embedded Linux projects over the past 5 years, it is interesting watching new users come on board.  The most recent announcement came from Koan that the KaeilOS distribution will be joining the OpenEmbedded project.  In the announcement, they summed up my thoughts well: We at KOAN wanted to […]

Sprint 598U USB Broadband Modem in Embedded Systems

One thing that works really well in Linux is support for USB Broadband modems. While it usually takes a little fiddling with PPP scripts, it is generally not too difficult to get working. One of the reasons for this is most modems implement a USB serial interface, and then the modem is controlled with standard […]

Socketcan utils and test apps added to OpenEmbedded

The Socketcan test applications and utilities are now available in OpenEmbedded.  The socketcan kernel modules already exist in OE.  To build and deploy: get the latest version of OE metadata bitbake socketcan-utils-test scp <oedir>/build/angstrom-2008.1/tmp/deploy/glibc/ipk/<machine>/socketcan-utils-test_0.0+svnr917-r0_armv5te.ipk root@<target IP address>: And then on the target system: opkg install socketcan-utils-test_0.0+svnr917-r0_armv5te.ipk opkg files socketcan-utils-test /usr/bin/tst_bcm_rx_sendto /usr/bin/tst_bcm_tx_sendto /usr/bin/canlogserver /usr/bin/tst_raw_filter /usr/bin/tst_raw /usr/bin/isotpsniffer […]

Socketcan CAN-bus drivers added to OpenEmbedded

I just added a recipe to OpenEmbedded to build the Socketcan kernel modules from the socketcan SVN.  So if you are using the latest OpenEmbedded metadata, you can: bitbake socketcan-modules scp <oedir>/build/angstrom-2008.1/tmp/deploy/glibc/ipk/<machine>/socketcan-modules_0.0+svnr917-r0_cm-x270.ipk  root@<target IP address>: and then on the target system: opkg install socketcan-modules_0.0+svnr917-r0_cm-x270.ipk opkg files socketcan-modules Package socketcan-modules (0.0+svnr917-r0) is installed on root and […]