On Fri, Sep 12, 2014 at 12:23 AM, <[email protected]> wrote:
> 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? > Can you start a new thread when you ask a new (not really related) question? I see some places this wasn't answered, but here's where I tried to address the issue: http://beagleboard.org/Community/Forums?place=msg%2Fbeagleboard%2F5Xk212VcTJM%2FN7vwvZcSbWMJ http://elinux.org/BeagleBone_Black_Extracting_eMMC_contents More recently, http://elinux.org/BeagleBone_Community#Board_recovery_and_Flashing_Images_on_BeagleBone was updated with: http://www.dc-computing.com/CloningCustomizedBeagles.html > > > 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 <[email protected]> >> 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 <[email protected]> >>> 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 <[email protected]> >>>> 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 <[email protected]> wrote: >>>>> >>>>>> >>>>>> From: <[email protected]> >>>>>> Reply-To: "[email protected]" <[email protected]> >>>>>> Date: Thursday, September 11, 2014 at 3:35 PM >>>>>> To: "[email protected]" <[email protected]> >>>>>> 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 [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:~$ >>>>>> >>>>>> 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 <[email protected]> >>>>>>> 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]> 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-raspb >>>>>>>>> erry-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]. >>>>>>>>> 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. >>>>>> >>>>>> -- >>>>>> 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. >>>>>> >>>>> >>>>> >>>> >>> -- >>> 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]. >>> 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. > -- 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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