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by guzunty
Sun Nov 23, 2014 4:26 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

Hi there, glad you're enjoying the PiTeR project. The sketch is there for sure, it's here: https://github.com/Guzunty/Pi/tree/master/src/gz_piter/sketch/PiTeR I've promoted different things at different times, so maybe you just need to do a 'git pull' it you cloned at an earlier time. You will find ...
by guzunty
Sun Nov 16, 2014 2:27 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

Feel free to explore how PiTeR uses OpenCV. It's very similar, except that it does the heavy lifting on a separate thread so that his control loop remains responsive. How all that works is the subject of a follow up MagPi article, so keep an eye out for that. (I'm hoping to hit the press deadlines f...
by guzunty
Sun Nov 16, 2014 2:18 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

Hi Steve, Good work getting the example code running. :-) Yes, I have noticed an issue with OpenCV 2.4.9. It looks like the integration with v4l2 got broken at that release. It fails to set the capture size, so what you're getting is the default. I also see some errors reported. Unfortunately, it im...
by guzunty
Sat Nov 15, 2014 8:15 pm
Forum: Automation, sensing and robotics
Topic: Rasberry Pi - build up a segway
Replies: 5
Views: 2095

Re: Rasberry Pi - build up a segway

Hi Juri5120,

Check out this resource:

https://github.com/Guzunty/Pi/wiki/Say-Hello-to-PiTeR

This robot balances like a segway. There is a complete list of parts, explanation of how it works and is fully open source soft/hardware.

HTH,

Derek
by guzunty
Thu Nov 13, 2014 3:48 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

There is a detailed parts list for PiTeR here now.

https://github.com/Guzunty/Pi/wiki/PiTeRs-Parts

best,

Derek
by guzunty
Thu Nov 13, 2014 2:22 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

Hi again Chris,

Your Guzunty is on its way to you. I'm sure you'll find it very useful for many projects, not just robotics. There is a topic about all the things you can do with it here:

http://www.raspberrypi.org/forums/viewt ... 41&t=49352
by guzunty
Thu Nov 13, 2014 2:19 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi karlitos, Sorry for the slow response, I must have missed the notification for this new message. You are correct that the JTAG pins only need to be connected during programming. As for the rest of your connections, nothing jumps out at me as being wrong. Of course, without knowing what your core ...
by guzunty
Tue Nov 11, 2014 1:53 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

Re: PiTeR, OpenCV and MagPi issue 28

Hi Chris,

That's a great idea.

I have been meaning to put together a parts list. I'll build one tonight and post back here when it's done.

In the meantime, were there any parts you were particularly interested to know about?

best,

Derek
by guzunty
Mon Nov 10, 2014 9:49 am
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 11146

PiTeR, OpenCV and MagPi issue 28

Hi, I'm PiTeR,

Image

I hope you found the MagPi article about my vision system interesting.

If you have any questions about using OpenCV image recognition on the Raspberry Pi, please post them here and I'll do my best to answer them.

best regards,

PiTeR
by guzunty
Tue Oct 14, 2014 2:15 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi karlitos, Using the LCD daughter board, you don't need to make any modifications to the Guzunty board. All needed RPi signals are taken on the daughterboard directly from the RPi GPIO connector. So no worries there. I am still little bit confused about the guzunty-board wiring. Especially the wir...
by guzunty
Thu Sep 18, 2014 10:43 am
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi karlitos, You will see when you look at gz_lcd.rpt that the core leaves quite a lot of capacity for additional functionality, I think you could save some external hardware by programming it to sense the encoders as well as interfacing to the display. Although encoders are quite simple, they are s...
by guzunty
Wed Sep 17, 2014 8:41 am
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi karlitos, Its all open source, so the schematics contain everything you need. What is perhaps not obvious is how the connectors on the daughterboard schematic map onto the Pi and Guzunty connectors and the LCD module itself, so I hope this explanation helps: P3 connects to the LCD module. J1 maps...
by guzunty
Mon Sep 15, 2014 7:53 am
Forum: Other projects
Topic: 320x240 LCD with integrated SSD1289 controller
Replies: 194
Views: 113841

Re: 320x240 LCD with integrated SSD1289 controller

Yeah, disassembly is *definitely* the last resort. My reading of the google hits is that the v1.3 board has the ILI9325 controller, which as you say is supported by the fbtft library. So try that first. If you need to go on to try the S6D1121, things get a little trickier, but not impossible. If you...
by guzunty
Thu Aug 28, 2014 9:21 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi Dave, Yes closing JP19 will bring the clock signal out to P2. It won't change any other behaviour, assuming you're not driving pin 15 of P2 with anything else. However, we need to establish if the clock signal is stopping as it comes out of the Pi or if it is intermittently being pulled low (or h...
by guzunty
Thu Aug 28, 2014 6:11 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hmmm. I have never seen or heard of that happening before. Do you have a scope? If so, check that GPIO4 is oscillating or if that stops too after some time. I'd suggest checking that with the Guzunty removed from the GPIO connector. If GPIO4 stops, then the problem is some other program or daemon yo...
by guzunty
Wed Aug 27, 2014 4:23 pm
Forum: Troubleshooting
Topic: Problem compiling kernel; No .IMG file!
Replies: 14
Views: 4562

Re: Problem compiling kernel; No .IMG file!

I think the problem is that the build process is not tested on Mac.

I have not submitted a defect report so I can't say I'm disappointed it hasn't been fixed.

It should be reported with the suggested fix for Mac.

In the meantime, I suggest you make the change by hand.
by guzunty
Wed Aug 06, 2014 4:04 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Here is an alternative H264 decoder core: http://opencores.org/project,nova It requires 169K logic gates while the XC9572XL has 1.6K logic gates, so even if you add SRAM the CPLD is ~100x too small. Another board to consider is the Papilio. The core will likely fit in a Papilio One which is only $37...
by guzunty
Mon Aug 04, 2014 7:28 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

As for downloading the project, no I'm afraid you can't download it and program the CPLD. The open core is a design that could be implemented in any one of several dozen programmable gate arrays from several manufacturers. These are the steps you would need to do in summary: - Download the core and ...
by guzunty
Mon Aug 04, 2014 7:18 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Hi there,

Don't worry, I don't feel like I'm spoon-feeding you. I do think you are in denial, though. :)

Much as both of us would like it to fit, there is absolutely no chance that a H264 decoding core will fit in a CPLD.

It's like trying to run Windows 8 in 64 kB of RAM.
by guzunty
Mon Aug 04, 2014 2:15 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Reading between the lines some more, they say that the compression works best on monitor desktops. I infer (or at least hypothesise) that this is because desktops tend to have large areas of flat colour. Going one step further, they may be doing simple run length encoding which might be squeezed int...
by guzunty
Mon Aug 04, 2014 1:52 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

I want to believe you, really I do ;-) I did a google search of that whole site and got no hits on the keywords CPLD or XC9572XL or XC9500XL. I do see where they have compression settings on the driver during modprobe, but as for the decompression mechanism I have no idea. EDIT: Hmmm, that does look...
by guzunty
Mon Aug 04, 2014 1:28 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Definitely not possible without some kind of external SRAM. Seriously, I'll eat my hat.

What makes you believe that they are decompressing the video with a CPLD? I followed the link and couldn't find any references to the use of a CPLD. Can you provide a more specific link please?
by guzunty
Mon Aug 04, 2014 11:21 am
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

Yes, they exist, here's one:

http://opencores.org/project,bluespec-h264

HTH,

Derek
by guzunty
Mon Aug 04, 2014 11:15 am
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

I have not tried compression. It should improve the frame rate if the target LCD controller has built in decompression, but I am not aware of any that do. Certainly if you're running the controller at or near its maximum resolution you can expect the frame rate to suffer. SPI simply can't go any fas...
by guzunty
Sun Aug 03, 2014 12:16 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 34403

Re: Guzunty Pi. New users start here.

If I read from the pins all bits are set, so I would need to pull these low to register a signal? Yes, I recommend using pull up resistors with a switch that connects to ground when closed. Something around 10K should be fine as a pull up. The CPLD has circuitry that will pull a floating value high...

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