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by 143pi
Sat Jun 11, 2016 2:00 pm
Forum: General discussion
Topic: Piezo Transducer output is zero when tapped
Replies: 7
Views: 1571

Re: Piezo Transducer output is zero when taped

Here is the link for piezo transducer working model https://en.wikipedia.org/wiki/Piezoelectric_sensor
by 143pi
Sat Jun 11, 2016 1:43 pm
Forum: General discussion
Topic: Piezo Transducer output is zero when tapped
Replies: 7
Views: 1571

Re: Piezo Transducer output is zero when taped

I have connected red wire (+ve) of transducer to the CH0 (channel 0) of ADC and black wire of transducer to GND of raspberry pi. I think the connection is perfect. Is that characteristic of Piezo transducer, to send output low signal when tap is detected and high signal when no tap?
by 143pi
Fri Jun 10, 2016 5:17 am
Forum: General discussion
Topic: Piezo Transducer output is zero when tapped
Replies: 7
Views: 1571

Piezo Transducer output is zero when tapped

I want to detect the tap/sound, I am using piezo transducer (circular) and coneccted it to raspberry pi using ADC (MCP3008, SPI communication). When I tap on the transducer the output value should increase somewhere between 0 to 1023 depending on the tap vibrations. But I am getting reverse output v...
by 143pi
Tue Jan 12, 2016 4:11 pm
Forum: General discussion
Topic: profiling steps for gprof
Replies: 0
Views: 413

profiling steps for gprof

I am following the profiling steps mentioned here http://www.thegeekstuff.com/2012/08/gprof-tutorial/ . Compiler is not generating gmon.out file. But when I followed same steps in Ubuntu mate on my PC, compiler is generating gmon.out file. Are there any different steps or tools for Raspbian OS? Does...
by 143pi
Sun Jan 10, 2016 4:26 am
Forum: General discussion
Topic: Is there any way to utilize all the 4 cores of raspberry pi2
Replies: 8
Views: 2737

Re: Is there any way to utilize all the 4 cores of raspberry

my code is not programmed to use multiple cores. I may need to rewrite the whole program to make use of multi threading.
by 143pi
Sat Jan 09, 2016 6:51 pm
Forum: General discussion
Topic: Is there any way to utilize all the 4 cores of raspberry pi2
Replies: 8
Views: 2737

Is there any way to utilize all the 4 cores of raspberry pi2

I have installed opencv on raspberry pi 2 and have written program to detect objects in the video. But the output is very slow. Is there any way to utilize all the 4 cores of raspberry pi 2 during run time? I want my program to run faster.
by 143pi
Fri Dec 11, 2015 11:06 pm
Forum: General discussion
Topic: How to expand memory spce for /usr/local/src
Replies: 9
Views: 1161

Re: How to expand memory spce for /usr/local/src

I tried to install ntfs-3g using " sudo apt-get install " but it is showing ntfs-3g is already in its newest version . I have created the new folder data /home/pi/data to mount my external hard-disk. I tried to mount my hard disk by using " sudo mount /dev/sda1 /home/pi/data " but it is throwing the...
by 143pi
Fri Dec 11, 2015 10:46 pm
Forum: General discussion
Topic: How to expand memory spce for /usr/local/src
Replies: 9
Views: 1161

Re: How to expand memory spce for /usr/local/src

I am paassing this video during runtime through command line argument. Can you please tell me what is thumb drive??
by 143pi
Fri Dec 11, 2015 10:35 pm
Forum: General discussion
Topic: How to expand memory spce for /usr/local/src
Replies: 9
Views: 1161

Re: How to expand memory spce for /usr/local/src

Yes, but I have to use that video as input video. my program should read that video.
by 143pi
Fri Dec 11, 2015 10:02 pm
Forum: General discussion
Topic: How to expand memory spce for /usr/local/src
Replies: 9
Views: 1161

Re: How to expand memory spce for /usr/local/src

Could you please advice me how to mount the thumbdrive..? The video is present in my 1Tb Hard disk. How can I mount this??
by 143pi
Thu Dec 10, 2015 7:15 pm
Forum: General discussion
Topic: How to expand memory spce for /usr/local/src
Replies: 9
Views: 1161

How to expand memory spce for /usr/local/src

Hello every one. I am running my program from /usr/local/src location and I need extra memory to store a video. The size of the video is around 20 GB. I am using 32 GB memory card for raspberry pi 2. Among 32 GB, 7.5 GB is already in use and remaining is not used. So I want to expand the memory /usr...
by 143pi
Thu Dec 03, 2015 9:27 pm
Forum: General discussion
Topic: How to make raspberry pi 2 run faster for opencv project..?
Replies: 1
Views: 519

How to make raspberry pi 2 run faster for opencv project..?

Does any one have idea to make raspberry pi 2 run faster for opencv project and code written in C++??
by 143pi
Tue Nov 24, 2015 8:34 pm
Forum: General discussion
Topic: How to install Valgrind tool, will it work with raspbian?
Replies: 13
Views: 6875

Re: How to install Valgrind tool, will it work with raspbian

When I run valgrind --leak-check=full --show-leak-kinds=all ./a.out on raspberry pi2 ( 32 bit processor, Ubuntu-Mate OS ) ==5739== LEAK SUMMARY: ==5739== definitely lost: 0 bytes in 0 blocks ==5739== indirectly lost: 0 bytes in 0 blocks ==5739== possibly lost: 355,811 bytes in 99 blocks ==5739== sti...
by 143pi
Thu Nov 19, 2015 9:28 pm
Forum: General discussion
Topic: How to install Valgrind tool, will it work with raspbian?
Replies: 13
Views: 6875

Re: How to install Valgrind tool, will it work with raspbian

rpdom could you please tell me some steps to check with... explain in brief.
by 143pi
Thu Nov 19, 2015 9:23 pm
Forum: General discussion
Topic: program not executing completely
Replies: 0
Views: 276

program not executing completely

I am running one program which is written in C++ for OpenCV on raspberry pi with ubuntu mate OS installed on it. I was not getting the expected out put file, so I kept a counter to count then no. of frames. On raspberry pi it is going upto 27 counts after that neither the counts will increase not th...
by 143pi
Tue Nov 17, 2015 6:57 pm
Forum: General discussion
Topic: How can relaese the swap memory in ubuntu
Replies: 0
Views: 300

How can relaese the swap memory in ubuntu

I am using raspberry pi2 and ubuntu mate OS. I have installed swap on the unbuntu mate. Hoe can i release swap memory and give it to root. I am getting error: memory is full.

Thank you
by 143pi
Mon Nov 16, 2015 10:43 am
Forum: General discussion
Topic: How to install Valgrind tool, will it work with raspbian?
Replies: 13
Views: 6875

Re: How to install Valgrind tool, will it work with raspbian

I would like to know any other methods to check memory leaks in the program..
by 143pi
Mon Nov 16, 2015 10:40 am
Forum: General discussion
Topic: video read is very slow
Replies: 7
Views: 1036

Re: video read is very slow

Could you please advice any board for this?? I am using pi2 with arm7 28series... Also I would like to know how to check memory leaks in the program.
by 143pi
Mon Nov 16, 2015 10:21 am
Forum: General discussion
Topic: video read is very slow
Replies: 7
Views: 1036

Re: video read is very slow

Yup, its like detecting persons, cars in the perticular area and counting them. Here i am not considering the real time. I have one video of that perticular area taken and just counting the no of persons and cars in that video. When I run that same program on VM it works fine. But in raspberry pi it...
by 143pi
Mon Nov 16, 2015 2:03 am
Forum: General discussion
Topic: What is OSMC..? Can we execute a program in that?
Replies: 6
Views: 2371

What is OSMC..? Can we execute a program in that?

Hello,

I have zero knowledge on OSMC OS, can we execute a program in that. ? is it similar to Ubuntu mate

https://osmc.tv/download/
by 143pi
Mon Nov 16, 2015 1:57 am
Forum: Windows 10 for IoT
Topic: How to get image file of Windows iot
Replies: 2
Views: 1677

How to get image file of Windows iot

When I downloaded windows iot for Raspberry pi 2, I got .iso file. How to download image file of windows iot for Raspberry pi2?
by 143pi
Mon Nov 16, 2015 1:03 am
Forum: General discussion
Topic: How to install Valgrind tool, will it work with raspbian?
Replies: 13
Views: 6875

How to install Valgrind tool, will it work with raspbian?

Hello everyone,

I want to check memory leaks in my program. I would link to know how to install Valgrind tool on Raspbian wheezy os..? Will it work on this OS. ? Please suggest me if you know any other methods/tools to check memory leaks.


Thank you
by 143pi
Mon Nov 16, 2015 12:33 am
Forum: General discussion
Topic: video read is very slow
Replies: 7
Views: 1036

Re: video read is very slow

The same program is executing properly in Virtual Machine (Ubuntu Mate) and the output is clear. But when i run it in raspberry pi, output is slow.

Please advice
by 143pi
Mon Nov 16, 2015 12:32 am
Forum: General discussion
Topic: ubuntu 14.04 is taking me to command window instead of GUI
Replies: 9
Views: 1249

Re: ubuntu 14.04 is taking me to command window instead of G

viewtopic.php?p=844222#p844222 This is the problem i am facing in Raspian-wheezy OS. So I am thinking to check with some other OS. However in VM(Ubuntu -Mate) the output is clear.
by 143pi
Mon Nov 16, 2015 12:27 am
Forum: General discussion
Topic: video read is very slow
Replies: 7
Views: 1036

video read is very slow

Hello, Coded in C++ for opencv on Raspbian wheezy OS. My program has to read a video which I am giving dynamically during run time and it has to display on output. But the video is very slow and it will not run completely. Could anyone please advice how to run it fast and complete. Do i need to inst...

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