BBB - Imaging with a PRU connected Camera

RE: BBB - Imaging with a PRU connected Camera

yusmi — Thu, 16 Apr 2020 08:48:12 GMT

hello, thanks for the great project about beaglebone
I'm using beaglebone green with debian 9 and when i make the cam.zip i have some problem :

yusmi@beaglebone:~/cam$ make clean

rm -rf *.o *.bin cam_app core *~

yusmi@beaglebone:~/cam$ make

pasm -b prucode_cam.p

make: pasm: Command not found

Makefile:46: recipe for target 'prucode_cam' failed

make: *** [prucode_cam] Error 127

yusmi@beaglebone:~/cam$

I really need this help very much and I've been stuck.

Thank you.

RE: BBB - Imaging with a PRU connected Camera

paul23 — Mon, 21 Jan 2019 02:09:36 GMT

Hi, thanks for the great post. I know it been a while since you did this work, but thought you might be able to point me in the right direction.

Do you have information on how to scale the image to different sizes in the camera setup? Seems to be some combination of registers 3E,41,72,74,75 - but your setup appears to not use these settings. I'd like to double the horizontal resolution. Any help is much appreciated!

RE: BBB - Imaging with a PRU connected Camera

rewsiffer — Sun, 06 May 2018 23:23:03 GMT

Can someone please explain how exactly to compile the i2c library? There are no steps in that forum post either. Thanks.

RE: BBB - Imaging with a PRU connected Camera

Former Member — Tue, 15 Mar 2016 08:21:05 GMT

Hey! Great work there!

I had one question. After doing some research, I am not really clear as to what the cairo buffer does. Can you explain or give me some links I can follow? TIA!

RE: BBB - Imaging with a PRU connected Camera

Former Member — Wed, 02 Mar 2016 10:55:07 GMT

Hi Shabaz,

this is really a wonderful document. i learned alot of things from this. i am having confusion in one thing. can you plz tell me that

what are you using to capture the waveforms?

RE: BBB - Imaging with a PRU connected Camera

nownuri — Fri, 01 May 2015 09:18:34 GMT

Hi Shabaz.

This is really nice article and what I have been looking for. I have a beaglebone black and now would interface a CMOS camera with it. To do this I want ask you for one thing. It would be very appreciated if you give me informations.

Could one interface and control the following CMOS camera module with BBB?

http://www.ovt.com/download_document.php?type=sensor&sensorid=109

It doesn't have to be fast capture. Actually I'd take perfectly still images for long time. But I wonder if I can control exposure time, ISO, frame rate(small) and so on. Would it be possible? Otherwise I should buy boards like NVIDIA tegra KT1(camera development board, $200). I hope that it is possible with BBB!

RE: BBB - Imaging with a PRU connected Camera

sammyt — Sat, 21 Mar 2015 06:31:17 GMT

Hi Shabaz!

Just wondering if you have any simple code for reading blocking UART with a PRU?

Cheers!

RE: BBB - Imaging with a PRU connected Camera

Former Member — Fri, 20 Mar 2015 13:21:30 GMT

Hello!

I need a little help. I am getting error while compiling the code provided by you and so far I haven't been able to figure it out please help. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-50abd2da-312c-49a7-a5cf-13f2c0e934b2/contentimage_5F00_2.png:16:16]

My output when I type 'make' is as follows

pasm -b prucode_cam.p

PRU Assembler Version 0.84

Pass 2 : 0 Error(s), 0 Warning(s)

Writing Code Image of 182 word(s)

gcc -c -o camctrl.o camctrl.c

gcc -c -o camimg.o camimg.c

gcc camctrl.o camimg.o -L. -lpthread -lprussdrv -lm -li2cfunc -lcairo -o cam_app

/usr/bin/ld: error: cam_app uses VFP register arguments, /usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libi2cfunc.a(i2cfunc.o) does not

/usr/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../libi2cfunc.a(i2cfunc.o)

collect2: ld returned 1 exit status

make: *** [cam_app] Error 1

RE: BBB - Imaging with a PRU connected Camera

Former Member — Thu, 16 Oct 2014 15:03:46 GMT

Shabaz Hello, you helped me with your I2C library a few days ago.

Continuing with my project the camera is working in QCIF. I want to use VGA resolution, but as you said in your article, the memory allocated in main RAM is very small, but can be changed. "To fix this requires the driver to change the RAM allocation".

I'm trying to do this, and it seems that there is a parameter for it in "uio_pruss.c", more specifically:

37 static int extram_pool_sz = SZ_256K;

38 module_param(extram_pool_sz, int, 0);

39 MODULE_PARM_DESC(extram_pool_sz, "external ram pool size to allocate");

But I'm not able to make it work ... You know how I do this? I only need to change these parameters? Or do I need to recompile the driver?

RE: BBB - Imaging with a PRU connected Camera

Former Member — Mon, 28 Apr 2014 09:00:21 GMT

Hi, very interesting stuff. I wanted to ask if you know about a method to add a composite video (with Cinch) input to the BBB?

RE: BBB - Imaging with a PRU connected Camera

Former Member — Sun, 09 Mar 2014 18:57:26 GMT

Its really nice to see such an informative discussion

Someone can share that, at what speed Arm CPU can take data from shared memory in PRU?

Is there a possibility to transfer some lines of date from shared memory in Pru to DDR memory to get high frame rate.

RE: BBB - Imaging with a PRU connected Camera

morgaine — Wed, 21 Aug 2013 00:46:54 GMT

This is a great project! Very nicely presented too --- what are you using to capture the waveforms?

Am I right in thinking that throughput is wholly camera-limited, and that using multiple cameras is feasible because the PRU isn't really being exerted much at all with a PCLK of 2MHz so it could multiplex several of them? One would run out of input pins before PRU bandwidth.

That said, transferring pixels at 2MHz isn't going to allow one to reach the rated 20-30 FPS at the highest resolution, so presumably the device would be configured for higher readout rates once you have it on a noise-controlled PCB?

RE: BBB - Imaging with a PRU connected Camera

fustini — Tue, 20 Aug 2013 00:37:11 GMT

Wow, another exciting BBB project and superbly documented blog post! Time for a publisher to come after you for a book deal [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-50abd2da-312c-49a7-a5cf-13f2c0e934b2/contentimage_5F00_1.png:16:16]