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by chfakht
Sat Jan 30, 2016 3:21 pm
Forum: General discussion
Topic: Difference between linux kernel and the raspberry kernel
Replies: 4
Views: 1994

Difference between linux kernel and the raspberry kernel

Hi,
can somoene tell me the differences between official linux kernel https://github.com/torvalds/linux and linux in raspberry repo https://github.com/raspberrypi/linux

Thanks :)
by chfakht
Thu Jan 28, 2016 3:41 am
Forum: Raspberry Pi OS
Topic: How to build / Re-configure My own OS for the raspberry
Replies: 6
Views: 1547

Re: How to build / Re-configure My own OS for the raspberry

Hi all :) , ... I don't know if doing this will improve the performance of the pi ... Any help will be appreciated :) It is a very interesting thing to do. But it will not improve the performance. Basically "stripping" the OS of modules will not help you in this case. The modules does not...
by chfakht
Thu Jan 28, 2016 3:36 am
Forum: General discussion
Topic: How to connect and use ssh without a screen using BUILDROOT
Replies: 6
Views: 2444

Re: How to connect and use ssh without a screen using BUILDR

it will be of course some gain in term of cpu and ram usage !!!
by chfakht
Thu Jan 28, 2016 3:35 am
Forum: Advanced users
Topic: Troubles with Motion.
Replies: 3
Views: 4687

Re: Troubles with Motion.

Have you solved this problem ?
by chfakht
Sun Jan 24, 2016 1:11 pm
Forum: General discussion
Topic: How to connect and use ssh without a screen using BUILDROOT
Replies: 6
Views: 2444

How to connect and use ssh without a screen using BUILDROOT

i want to build a minimal system for raspberry pi (B+) to improve the performance of my face detection algorithm ... I have found BuildRoot ... for the configuration i found that it's not necessary to do the configuration myself and instead i have used the provided one : make raspberrypi_defconfig m...
by chfakht
Sat Jan 16, 2016 2:12 am
Forum: Raspberry Pi OS
Topic: How to build / Re-configure My own OS for the raspberry
Replies: 6
Views: 1547

Re: How to build / Re-configure My own OS for the raspberry

Have you had a look at the site? You can start with a base image and work it up from there. Much easier to build up from a base then to take Raspbian and try to break it apart. If you want the tools to fit your situation, you have to forge them yourself. ok i will try your suggestion and let you kn...
by chfakht
Sat Jan 16, 2016 1:00 am
Forum: Raspberry Pi OS
Topic: How to build / Re-configure My own OS for the raspberry
Replies: 6
Views: 1547

Re: How to build / Re-configure My own OS for the raspberry

http://www.intestinate.com/pilfs/ Pi Linux From Scratch thanks i don"t really want to do it from scratch because i think it will require much more time :mrgreen: ... how about modifying the existing raspbian : that the purpose of posting this post ? :P because i haven't found something interre...
by chfakht
Fri Jan 15, 2016 11:21 pm
Forum: Raspberry Pi OS
Topic: How to build / Re-configure My own OS for the raspberry
Replies: 6
Views: 1547

How to build / Re-configure My own OS for the raspberry

Hi all :) , I'm using Raspbian with raspberry pi but i wan't to make my own OS based on raspbian or debian of course :ugeek: ... Firstly i have done some basic applications and they worked perfectly ... the problem came when trying to do some image processing on the pi (i know it's not the right car...
by chfakht
Thu Aug 20, 2015 3:56 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: configuring network access via wifi dongle (adapter) FAILED
Replies: 3
Views: 954

Re: configuring network access via wifi dongle (adapter) FAI

If you get a link-local address that means your WiFi dongle can't reach your home router. The normal cause for that is that you've got the security credentials for the network wrong. Start the GUI, use the WiFi config on there (there's an icon in top right corner of the desktop) to get connected. I...
by chfakht
Thu Aug 20, 2015 1:47 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: configuring network access via wifi dongle (adapter) FAILED
Replies: 3
Views: 954

configuring network access via wifi dongle (adapter) FAILED

Hi , i have a wifi adapter for the raspberry pi that i want to use to get access to the wifi network i have done all the steps from this tutoria http://www.raspyfi.com/wi-fi-on-raspberry-pi-a-simple-guide/ using Wicd-curses the wifi network was detected and i have selected static ip and entered the ...
by chfakht
Sun Aug 16, 2015 10:04 pm
Forum: Troubleshooting
Topic: can't install locales HELP
Replies: 8
Views: 3051

Re: can't install locales HELP

The variable settings are fine on Ubuntu, and now also on the Pi. You need to "generate" fr_FR.UTF-8 (and en_US.UTF-8) on the Pi, either in "sudo dpkg-reconfigure locales", or by uncommenting the lines in /etc/locale.gen and then running "sudo locale-gen". For consiste...
by chfakht
Sun Aug 16, 2015 7:08 pm
Forum: Troubleshooting
Topic: can't install locales HELP
Replies: 8
Views: 3051

Re: can't install locales HELP

Is this system supposed to be a wheezy system or a jessie system? what do you have in your /etc/apt/sources.list ? it's a wheezy system , but i have one day change wheezy to jessie to install g++-4.9 and revert back to wheezy :| Try changing your sources back to jessie and doing apt-get update &...
by chfakht
Sun Aug 16, 2015 3:28 pm
Forum: Troubleshooting
Topic: can't install locales HELP
Replies: 8
Views: 3051

Re: can't install locales HELP

LC_ALL = "en_US.UTF-8", LC_PAPER = "fr_FR.UTF-8", As an aside to the actual problem, do you get similar output to the above from "locale" on the Ubuntu system? LC_ALL overrides every other category, so it makes no sense to set both it and the other variables (except pe...
by chfakht
Sun Aug 16, 2015 3:25 pm
Forum: Troubleshooting
Topic: can't install locales HELP
Replies: 8
Views: 3051

Re: can't install locales HELP

plugwash wrote:Is this system supposed to be a wheezy system or a jessie system? what do you have in your /etc/apt/sources.list ?
it's a wheezy system , but i have one day change wheezy to jessie to install g++-4.9 and revert back to wheezy :|
by chfakht
Sun Aug 16, 2015 12:35 am
Forum: Troubleshooting
Topic: can't install locales HELP
Replies: 8
Views: 3051

can't install locales HELP

When trying to solve this problem here How to fix perl : warning : setting local failed http://stackoverflow.com/questions/31990851/how-to-fix-perl-warning-setting-local-failed-on-raspberry-pi?noredirect=1#comment51889438_31990851 i run sudo dpkg-reconfigure locales perl: warning: Setting locale fai...
by chfakht
Mon Aug 10, 2015 11:44 am
Forum: C/C++
Topic: [SOLVED]Easy way to connect to mySQL database with C++?
Replies: 5
Views: 11979

Re: [SOLVED]Easy way to connect to mySQL database with C++?

it's working for me thanks
by chfakht
Fri Aug 07, 2015 4:42 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Problem configuring TOUCHSCREEN for Raspberry pi
Replies: 1
Views: 575

Problem configuring TOUCHSCREEN for Raspberry pi

i want to use the touchscreen 3.5 adafruit https://www.adafruit.com/products/2050 so i followed this tutorial : https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/easy-install i run the following commands from the link : curl -SLs https://apt.adafruit.com/ad...
by chfakht
Sun Jul 26, 2015 8:15 pm
Forum: Camera board
Topic: How to measure the distance from pi NOIR CAMERA MODULE and t
Replies: 4
Views: 3087

How to measure the distance from pi NOIR CAMERA MODULE and t

i need to measure the distance between the pi camera module and the object , i've found this formula distance to object (mm) = focal length (mm) * real height of the object (mm) * image height (pixels) ------------------------------------------------------------------------------------------------ o...
by chfakht
Sat Jul 25, 2015 1:11 am
Forum: General discussion
Topic: How to use floating point support in the pi 2 using raspbian
Replies: 10
Views: 3842

Re: How to use floating point support in the pi 2 using rasp

sudo apt-get install gcc-4.6-doc i have noticed that there is no improvement in the executable of the program ? is using those flags just optimize the code for the target , here pi 2 ?? :arrow: and have nothing to do with speed and performance ?? There are a couple of potential issues. First a lot ...
by chfakht
Fri Jul 24, 2015 4:17 pm
Forum: General discussion
Topic: How to use floating point support in the pi 2 using raspbian
Replies: 10
Views: 3842

Re: How to use floating point support in the pi 2 using rasp

sudo apt-get install gcc-4.6-doc then man gcc See the ARM options It doesn't say much other than list the options, but the Pi2 Cortex-A7 fpu has NEON and the later VFPv4. NEON is the new SIMD instruction set. So -mfpu=neon-vfpv4 is the best option. thanks it worked :D , but i have noticed that ther...
by chfakht
Wed Jul 22, 2015 3:54 pm
Forum: General discussion
Topic: How to use floating point support in the pi 2 using raspbian
Replies: 10
Views: 3842

Re: How to use floating point support in the pi 2 using rasp

jahboater wrote:That's for the Pi1, for the Pi2 you should use
-mfpu=neon-vfpv4
and possibly something like
-ftree-vectorize
to enable auto vectorisation if required.
thanks, have you a link to this so i can know what this flags means ;) :mrgreen:
by chfakht
Tue Jul 21, 2015 9:54 am
Forum: General discussion
Topic: How to use floating point support in the pi 2 using raspbian
Replies: 10
Views: 3842

Re: How to use floating point support in the pi 2 using rasp

Any standard compile should use the floating point unit already. I'm not sure if OpenCV includes NEON optimisation, but you could try enabling that (its a compile time switch, cannot remember it but Google will). There may also be opportunities to use the multi cores by writing multithreaded code i...
by chfakht
Fri Jul 17, 2015 3:07 pm
Forum: Camera board
Topic: what is the coverage angle of the camera board
Replies: 3
Views: 1141

what is the coverage angle of the camera board

Hi all :) ,
i have a simple question :oops: : what is the coverage angle (angle of view) of the camera board
another question : what lens can i use outdoor to protect the camera from day light :idea: and to improve video quality :mrgreen:

thanks a lot :)
by chfakht
Wed Jul 15, 2015 10:16 pm
Forum: General discussion
Topic: How to use floating point support in the pi 2 using raspbian
Replies: 10
Views: 3842

How to use floating point support in the pi 2 using raspbian

Hi all i'm using raspberry pi 2 with raspbian , i'm working on face and eyes detection using opencv and c++ , i want to improve the performance and reduce time detection in the program and i was wondering if i can use the floating point unit FPU ?? and how to use it . Any suggestions will be appreci...

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