This article outlines the steps necessary for building OpenCV for a Linux ARM target. OpenCV is an open-source, cross-platform computer vision and machine vision library. I cross compiled OpenCV for a Xilinx Zinq ARM system yesterday by more-or-less following the steps outlined in the above document – I had to change a few things […]
I am taking this opportunity to document a cross compilation procedure for libjpeg targeting ARM Linux mostly so that I won’t have to go searching for it again in the future! First create a directory and cd to it: mkdir libjpeg_build cd libjpeg_build Now get the source and un-tar it: wget http://www.ijg.org/files/jpegsrc.v9.tar.gz tar -xzvf jpegsrc.v9.tar.gz […]
By default #include statements are not inserted into files for dependency relationships when generating C++ code from UML models in Sparx Enterprise Architect – this is a bit annoying but we are well used to UML editors doing annoying things so at least it’s not a terrible surprise! In Enterprise Architect’s defence it is […]
If you are using the easy social module in drupal 6 with a quirky (read rubbish) theme (or sometimes ubercart) then you may notice that the social media buttons don’t get displayed on some node types. To get around this problem you may have to alter the node’s template to manually insert the Easy […]
If you are trying to use sleep_for() in the standard C++ thread library via GCC and are getting an error like the following: ‘sleep_for’ is not a member of ‘std::this_thread’ The you may have to define the following symbol: _GLIBCXX_USE_NANOSLEEP More information can be found here.
If you are scratching your head about how to setup Eclipse and CDT to use the boost thread library then have a look at the first post in this thread: http://www.eclipse.org/forums/index.php/m/787571/ It explains which project settings need to be changed. Thanks to Robert!
I came across this interesting article in Dr. Dobbs that details the implementation of a light weight logging framework in C++ that uses policy classes: http://www.drdobbs.com/cpp/a-lightweight-logger-for-c/240147505?pgno=1 I reckon that it could be of special of interest for use with embedded systems.
I recently started getting the following error when opening a solution in Visual Studio 2010: “The associated source control plug-in is not installed or could not be initialized. Common causes for this error include server unavailability and/or incorrect workspace mappings” I had just installed Visual Studio 2012 and was worried this had caused the problem […]
You may have been having problems mounting an NFS volume on a Xilinx Zynq kernel build, perhaps mount fails with a ‘Connection Refused’ error message. If you check the /var/log/messages cat /var/log/messages Then you may see some entries like this: Jan 10 21:22:34 zynq-zx3-starter user.warn kernel: svc: failed to register lockdv1 RPC service (errno 111). […]
If you don’t want to use apache or the like to publish your web2py app then you can use web2py’s own little web server (rocket) by running web2py.py like this: python web2py.py This won’t accept external connections however, and it also listens on port 8000 rather than port 80. So, to allow external […]