I was able to build and install the same version of openCV (2.4.9) on BBB debian as on my desktop Ubuntu by using an external USB memory stick. Now I have a problem with changing CPU frequency (as I would like to increase it from 300MHz to 1GHz)
debian@beaglebone:~$ cpufreq-info cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to [email protected], please. analyzing CPU 0: driver: generic_cpu0 CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 300 us. hardware limits: 300 MHz - 1000 MHz available frequency steps: 300 MHz, 600 MHz, 800 MHz, 1000 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 300 MHz and 1000 MHz. The governor "ondemand" may decide which speed to use within this range. * current CPU frequency is 300 MHz.* cpufreq stats: 300 MHz:97.20%, 600 MHz:0.20%, 800 MHz:0.06%, 1000 MHz:2.55% (35) debian@beaglebone:~$ sudo cpufreq-set -g GOV *Error setting new values*. Common errors: - Do you have proper administration rights? (super-user?) - Is the governor you requested available and modprobed? - Trying to set an invalid policy? - Trying to set a specific frequency, but userspace governor is not available, for example because of hardware which cannot be set to a specific frequency or because the userspace governor isn't loaded? debian@beaglebone:~$ What am I doing wrong? Jan On Wednesday, 10 September 2014 12:52:11 UTC+10, Brandon I wrote: > > And, here are some compile flags you'll want to include/force: > http://www.eliteraspberries.com/blog/2013/09/cflags-for-numerical-computing-on-the-beaglebone-black.html > > > On Tue, Sep 9, 2014 at 7:16 PM, Brandon I <[email protected] > <javascript:>> wrote: > >> I'm not sure that newer open cv can be compiled on the raspberry or >> beaglebone due to the limited ram. You'll probably have to cross compile. >> >> On Tue, Sep 9, 2014 at 5:56 PM, <[email protected] <javascript:>> >> wrote: >> >>> Thanks for that link, it is very usefull. >>> In a meantime my attempt to install a newer version of opencv (following >>> the instructions from here >>> http://robertcastle.com/2014/02/installing-opencv-on-a-raspberry-pi/0) >>> has failed firstly with cmake-curses-gui not working (empty database?) and >>> after that (using command line cmake) the building stopped with a error >>> message of not enough memory. >>> Jan >>> >>> On Tuesday, September 9, 2014 11:03:58 AM UTC+10, [email protected] >>> wrote: >>>> >>>> Hi, >>>> >>>> I need to implement tracking of color ball with opencv on BBB. >>>> I have a rev.C BBB with latest (default Debian) including opencv 2.3.1 >>>> On my desktop Ubuntu I have installed opencv 2.4.9 >>>> To check the initial performance I used the example webcam program from >>>> the book "Practical OpenCV" listing 4-4 p.34 playing >>>> the video from USB camera (Logitech C920) >>>> I need a resolution of 640x480. >>>> The problem is with a speed on BBB, having a significant delay. It's >>>> good on a desktop PC. >>>> >>>> I would like to ask for advice how to improve the performance on BBB if >>>> possible. >>>> >>>> Jan >>>> >>>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/fTan4VKv1no/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected] <javascript:>. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
