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by GauVeldt
Wed Sep 09, 2015 11:56 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Use RPi to control power on/off PC (ATX)
Replies: 9
Views: 4032

Re: Use RPi to control power on/off PC (ATX)

lsusb OK :!: So your running linux *hands in the air* :) >>Nothing short of cutting power to it gets it working again. I guess this means you have tried with modprobe removing/reloading the wifi module/driver?... FYI: it's a signal king (made in china) USB long range wifi antenna connected to a PC ...
by GauVeldt
Wed Sep 09, 2015 2:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Use RPi to control power on/off PC (ATX)
Replies: 9
Views: 4032

Re: Use RPi to control power on/off PC (ATX)

The problem is the antenna goes down a lot. I wander why :?: And what make model this usb antenna , what OS it is running on .. What the system reports when this happens. Any way sound like you are all ready working towards some sort of unconventional sloution ! just quits. lsusb no longer can see ...
by GauVeldt
Tue Sep 08, 2015 5:15 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Need circuit help: get Pi to turn on/off PC PSU and disks
Replies: 6
Views: 3439

Re: Need circuit help: get Pi to turn on/off PC PSU and disk

Are there optocouplers around that can drive 12V output signals with 3.3V level inputs while not releasing factory smoke? If so, there's an alternative solution for that brown wire.
by GauVeldt
Tue Sep 08, 2015 5:10 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Need circuit help: get Pi to turn on/off PC PSU and disks
Replies: 6
Views: 3439

Re: Need circuit help: get Pi to turn on/off PC PSU and disk

However the plan was to use the PSU to power hard drives which will be connected to the Pis (via USB), so the grounds will be connected together anyway. Connecting the 3.3V supplies from the Pis together is a bad idea as the 3.3V lines will all be at slightly different levels and the PI regulators ...
by GauVeldt
Tue Sep 08, 2015 4:17 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Use RPi to control power on/off PC (ATX)
Replies: 9
Views: 4032

Re: Use RPi to control power on/off PC (ATX)

:?: https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=51660 That post is attempting to use a power supply directly, not to control a PC's power via the mainboard's power pushbutton connections. They aren't the same. The power supply itself uses a continuous switch, whereas the mainboard itsel...
by GauVeldt
Tue Sep 08, 2015 6:45 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Use RPi to control power on/off PC (ATX)
Replies: 9
Views: 4032

Use RPi to control power on/off PC (ATX)

I am hoping the needed circuitry is not too dificult: The problem is as follows. I have a firewall/routing PC that also provides the wifi AP using a USB wifi long-range wifi antenna. The problem is the antenna goes down a lot. Simply unplugging it at the usb and replugging does not fix the problem s...
by GauVeldt
Tue Sep 08, 2015 6:00 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Need circuit help: get Pi to turn on/off PC PSU and disks
Replies: 6
Views: 3439

Re: Need circuit help: get Pi to turn on/off PC PSU and disk

Linking the Pi and PSU grounds might not be such a great idea since they may vary in potential causing ground loop interference and possibly damage. The best approach is probably an optocoupler whose input is driven by the Pi and whose output drives the PSU's 5V line.
by GauVeldt
Wed Mar 04, 2015 5:07 pm
Forum: Camera board
Topic: Feasibility of using pi-cam for motion capture
Replies: 2
Views: 1883

Re: Feasibility of using pi-cam for motion capture

I'm putting this off for now since the situation with Pi's, cameras and proprietary specs has basically made this project much harder to achieve on Pi than some other existing DIY solutions using Wiimotes or the kinect camera for motion capture.
by GauVeldt
Wed Mar 04, 2015 5:00 pm
Forum: General discussion
Topic: Camera fps
Replies: 29
Views: 11106

Re: Camera fps

ghans wrote:I agree , the Pi is the wrong tool for the job.


ghans
Probably going to scrap attempting to do this on Pi at all and stick to using wiimotes or the DIY project that uses a Kinect camera instead. Saves me $250.
by GauVeldt
Wed Mar 04, 2015 4:50 pm
Forum: General discussion
Topic: Camera fps
Replies: 29
Views: 11106

Re: Camera fps

This is a mobile phone sensor costing £15, not a DSLR. Almost all mobile phone sensors are rolling shutter as global shutter is just too expensive. If it's not suitable for you application then you will need to look elsewhere, but you may be surprised. Well from another thread ( http://www.raspberr...
by GauVeldt
Wed Mar 04, 2015 4:16 pm
Forum: Camera board
Topic: Feasibility of using pi-cam for motion capture
Replies: 2
Views: 1883

Re: Feasibility of using NoIR camera for motion capture

Not really a bump but I was pointed out in the linked topic that the Pi-Cams use a rolling shutter thus eliminating the possibility of using sub-frame interleaving (actually I wasn't doing anything subframe but I digress). It this point I could just switch to barcoded pads of a specific color, chuck...
by GauVeldt
Wed Mar 04, 2015 3:55 pm
Forum: General discussion
Topic: Camera fps
Replies: 29
Views: 11106

Re: Camera fps

You may need to watch out as the sensor is based around a rolling shutter (http://en.wikipedia.org/wiki/Rolling_shutter) - not all lines of the image are exposed at the same moment in time, so synchronising your LEDs to the sensor may not be feasible. Aren't rolling shutters absolutely terrible for...
by GauVeldt
Wed Mar 04, 2015 7:35 am
Forum: Camera board
Topic: Feasibility of using pi-cam for motion capture
Replies: 2
Views: 1883

Feasibility of using pi-cam for motion capture

Edit: The LED, buffers and related wiring are no longer going to be used (instead just use barcode pads of a specific color not occurring the recording area other than the pads themselves) and the project may use regular Pi-Cams (NoIR no longer necessary). This would raise the limit on the number o...
by GauVeldt
Wed Mar 04, 2015 7:09 am
Forum: General discussion
Topic: Camera fps
Replies: 29
Views: 11106

Re: Camera fps

The camera now supports a maximum of 90fps at VGA resolution. You won't get more. ghans I knew the part about max fps of 90 but there were firmware issues where requesting the >30fps lowres framerates didn't get them as the OP had mentioned so I'm wondering if @jamesh had fixed those. The last post...
by GauVeldt
Wed Mar 04, 2015 1:13 am
Forum: General discussion
Topic: Camera fps
Replies: 29
Views: 11106

Re: Camera fps (feasibility of NoIR IR tracking project)

This looks to be about 18 months old topic now so it might be worth it to necro-bump it to query if @jamesh made any progress with the camera framerate logic. I want to consider the possbility of an IR tracking project using the NoIR camera. For this I would use the lowest-P mode at the highest fram...
by GauVeldt
Sun Apr 07, 2013 5:39 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

Don't shaders need to work on textures in VRAM (ie: GPU's allocation)? In which case leave the bayer in VRAM until the shaders have done whatever conversions (hopefully the debayer process can be coded as a GLSL/Cg shader depending on the fragment shader model that is supported). Don't move it to t...
by GauVeldt
Sun Mar 17, 2013 3:15 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

you will be transferring the (large) bayer chunk of data to the Arm where it would be processed by a 700Mhz processor Don't shaders need to work on textures in VRAM (ie: GPU's allocation)? In which case leave the bayer in VRAM until the shaders have done whatever conversions (hopefully the debayer ...
by GauVeldt
Sat Mar 16, 2013 8:57 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

you will be transferring the (large) bayer chunk of data to the Arm where it would be processed by a 700Mhz processor Don't shaders need to work on textures in VRAM (ie: GPU's allocation)? In which case leave the bayer in VRAM until the shaders have done whatever conversions (hopefully the debayer ...
by GauVeldt
Sat Mar 16, 2013 1:48 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

Image System Pipeline is one definition (there are others). It's the path the image takes from being captures by the sensor to being fully processed and decent. On the GPU there are >20 stages to the ISP. The CSI-2 port where the camera attaches is just the first stage. That produces a raw bayer im...
by GauVeldt
Sat Mar 16, 2013 1:33 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

bernd71 wrote:
Hardware_man wrote:So don’t blame the “1%”, blame the bizarre.
Hardware_man
I'd say the discussion already got political despite my attempts not to.
by GauVeldt
Fri Mar 15, 2013 10:21 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

This is the set of parameters (and there are a lot of them) that set up the various HW blocks in the ISP to take the raw bayer image and convert it to a decent quality image. You might be right. To me ISP normally means Internet Service Provider. I reckoned that it might be the hardware on the came...
by GauVeldt
Fri Mar 15, 2013 10:16 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

What is this 'bazaar' you keep referring to? I've seen it mentioned in the forums elsewhere so I thought you understood the metaphor of the bazaar versus the cathedral. It's a way to abstract the open-vs-closed development models without raising unnecessary attention to specifics that may become tr...
by GauVeldt
Fri Mar 15, 2013 2:55 am
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

Remember that the GPU does a lot more than just 'move the data around'. It has a real time Image processing pipeline so all the tuning is applied to the incoming data. Also note that the CSI is just for the data side, there is also an I2C interface on the camera control purposes (Is that what you w...
by GauVeldt
Thu Mar 14, 2013 6:13 pm
Forum: Camera board
Topic: Camera Interface Specs
Replies: 353
Views: 97704

Re: Camera Interface Specs

I think all the connector specs are public (maybe not camera?), but the camera interface connects directly to the GPU either using CCP2 or CSI-2. Your camera would require a new driver on the GPU, and they are usually pretty complicated. Since yours has a zoom lens you also need a more than usually...

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