That works. Another question is how to clone or replicate BBBs eMMC? How to move it into microSD card and vice versa? If I need to have exactly the same image on another BBB as the one I am currently working on (when it's finished) what is the procedure then?
On Friday, 12 September 2014 12:45:15 UTC+10, Brandon I wrote: > > Or, cpufreq-set -f 1GHz > > On Thu, Sep 11, 2014 at 4:39 PM, William Hermans <yyr...@gmail.com > <javascript:>> wrote: > >> Oh, and for the uninitiated . . . setting your governor to performance / >> 1Ghz _all_the_time_ may not be a very good idea. For instance it has been >> in the mid to upper 80's F outdoor ambient here, and I've noticed my BBB >> getting pretty warm. >> >> On Thu, Sep 11, 2014 at 4:34 PM, William Hermans <yyr...@gmail.com >> <javascript:>> wrote: >> >>> From memory setting profile limits would be like this >>> >>> You change to a profile via >>> $ sudo cpufreq-set -g <govenor_name> >>> Check profile limits >>> $ sudo cpufreq-info -p >>> Change minimum profile range >>> $ cpufreq-set -d 1000000 /*set minimum processor freq for active profile >>> to 1 GHz */ >>> >>> I do not know if these setting persist across reboots, but I think not. >>> At least it did not see that was for me. Also settings seem to be a bit >>> quirky. On one of my Linux support system for instance, manually changing >>> anything did not work as expected. I could change profiles, governors etc, >>> but actual frequency always stayed the same. Then with BBB when you set >>> minimum ondemand profile to 1Ghz, it does not take. But when changing to >>> performance profile, minimum freq is 300Mhz, but when you check actual >>> processor freq it is 1Ghz . . . >>> >>> So yeah, anyhow the program is quirky. >>> >>> On Thu, Sep 11, 2014 at 4:26 PM, William Hermans <yyr...@gmail.com >>> <javascript:>> wrote: >>> >>>> $ cpufreq-set --help. You may need to set you profile limits/ >>>> performance is default 300MHz to 1Ghz just like ondemand, but for some >>>> reason it is always 1GHz whenever I look. >>>> >>>> On Thu, Sep 11, 2014 at 3:47 PM, John Syn <john...@gmail.com >>>> <javascript:>> wrote: >>>> >>>>> >>>>> From: <janszyma...@gmail.com <javascript:>> >>>>> Reply-To: "beagl...@googlegroups.com <javascript:>" < >>>>> beagl...@googlegroups.com <javascript:>> >>>>> Date: Thursday, September 11, 2014 at 3:35 PM >>>>> To: "beagl...@googlegroups.com <javascript:>" < >>>>> beagl...@googlegroups.com <javascript:>> >>>>> Subject: Re: [beagleboard] Re: color ball tracking with opencv on BBB >>>>> >>>>> 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 cpu...@vger.kernel.org <javascript:>, >>>>> 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:~$ >>>>> >>>>> William just explained how to do this earlier today: >>>>> >>>>> *sudo cpufreq-set -g performance* >>>>> >>>>> Regards, >>>>> John >>>>> >>>>> >>>>> >>>>> 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 <brando...@gmail.com> >>>>>> 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, <janszyma...@gmail.com> 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, >>>>>>>> janszyma...@gmail.com 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 >>>>>>>> beagleboard...@googlegroups.com. >>>>>>>> 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 beagleboard...@googlegroups.com <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 beagleboard...@googlegroups.com <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 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 >> beagleboard...@googlegroups.com <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. 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