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by Gavinmc42
Tue Jul 11, 2017 1:49 am
Forum: Off topic discussion
Topic: 4K HDR Capable SBC ?
Replies: 29
Views: 14312

Re: 4K HDR Capable SBC ?

Cool would be a VC5? Maybe BCM7268 2A+ , a dual core A+ would be cool but the BCM7268 is ARMv7, ho hum. Most of the 96? models of set top box BCM chips seem to have 32bit low end cpu's. 4K would be cool. Read some where that ARM says h.265 is easier to do in software and harder in hardware, but that...
by Gavinmc42
Mon Jul 10, 2017 9:02 am
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Re: Hardware JPEG

I would still get Ultibo to translate the VCOS which isn't hard and you can then poke around .. just saying Learning how VCOS works and how to use it is not the same as learning about the hardware itself. But grabbing the output of VCOS could give clues to how to set those registers up. Figuring ou...
by Gavinmc42
Mon Jul 10, 2017 7:27 am
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Re: Hardware JPEG

http://jpeg-hw-comp.sourceforge.net/ I am trying figure out the JPEG hardware not OpenVG or V3D-VG. https://rawgit.com/msperl/rpi-registers/master/rpi-registers.html#JP JP_HADDR /JP_HWDATA - Huffman table? JP_QADDR/JP_QWDATA/JP_QCTRL - Quantization tables? Good idea about FPGA, seeing how FPGAs do i...
by Gavinmc42
Sun Jul 09, 2017 10:22 pm
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Re: Hardware JPEG

I have a suspicion the jpeg hardware is a few hardware assist blocks and not a complete solution. This does seem to be suggested in one of the patents. The 4 registers for memory addresses suggest it may be 4 blocks, each block doing something different. H, M, O, Q with an extra Q register. If one b...
by Gavinmc42
Sun Jul 09, 2017 5:50 am
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Re: Hardware JPEG

VC4 VG discussion https://ultibo.org/forum/viewtopic.php?f=15&t=659&sid=6eb1c81996306ac6cc23c207e36cf36d Ultibo pretty much has all the mailbox etc stuff working and I have starting reading the V3D registers and checked I can read other. So it should be possible to now do the VG V3D stuff. If that i...
by Gavinmc42
Sun Jul 09, 2017 1:44 am
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Re: Hardware JPEG

Not really interested in VG as the subject in this post, that was just an example of Peter's use of Control List to the V3D which I had not seen or noticed before. There is enough info in Peter's code to at least add some VG acceleration into pascal etc. Seen all those other links, not relevant to j...
by Gavinmc42
Sat Jul 08, 2017 8:55 am
Forum: Bare metal, Assembly language
Topic: Hardware JPEG
Replies: 16
Views: 4210

Hardware JPEG

Have been having fun with Peter Lemon's VC4 baremetal. https://github.com/PeterLemon/RaspberryPi Of real interest to me was the hardware accelerated VG graphics as it was one of the few thing I understood :oops: The Control List method of getting the VC4 to do stuff seems simple enough, an interface...
by Gavinmc42
Wed Jul 05, 2017 11:51 am
Forum: Troubleshooting
Topic: Pi Zero W no signs of life [solved]
Replies: 11
Views: 2412

Re: Pi Zero W no signs of life [solved]

This needs to stop now, it's been done, it's not big, it's not clever. Sorry, it was the only thing I could think of at the time. Ear rings? Nope that's been done too. Blend it? Think the normal one has been done, blended Zero, anyone? Bookmark, keyring, done and done? What to do with Pi's when the...
by Gavinmc42
Wed Jul 05, 2017 11:35 am
Forum: Beginners
Topic: Smartphone camera integration
Replies: 3
Views: 2221

Re: Smartphone camera integration

I think some of the guys at RPF did work on the Nokia 808. They could probably tell you it can be done but are probably not allowed to tell you how:lol: You are starting right at the top, 41Mp? Now if you could get the Symbium source for the 808, that might help. All these old phones and tablets wit...
by Gavinmc42
Wed Jul 05, 2017 2:43 am
Forum: Troubleshooting
Topic: Pi Zero W no signs of life [solved]
Replies: 11
Views: 2412

Re: Pi Zero W no signs of life [solved]

first thing that I noticed was a fiss
That was the smoke getting out.
I think the only thing left to do is drill a big hole in the middle and turn it into a fidget spinner.
by Gavinmc42
Tue Jul 04, 2017 10:45 am
Forum: General discussion
Topic: Best low-cost display for mission school?
Replies: 3
Views: 759

Re: Best low-cost display for mission school?

Yep old monitors are easier to get. Even old TV's from Cash Converters etc.
Most of my Pi's run on them, some even have USB hubs that can power a B+, Pi3's draws a bit to much.
Spare monitor, $5 mice and keyboards, a DVI adapter/cable, a few USB/network cables etc.
USB reader.....
by Gavinmc42
Mon Jul 03, 2017 11:48 am
Forum: General discussion
Topic: selecting OS remotely
Replies: 3
Views: 671

Re: selecting OS remotely

IR controlled SDcard switcher? Some sort of mux? They can make HDMI switchers why not SD? Google is our friend http://hackaday.com/2014/06/08/the-in-circuit-sd-card-switch/ https://www.modmypi.com/raspberry-pi/sd-cards-and-adaptors/sd-card-readers/2-in-1-sd-card-dual-system-switcher-for-raspberry-pi...
by Gavinmc42
Mon Jul 03, 2017 11:40 am
Forum: Bare metal, Assembly language
Topic: Fast boot (sub second) of pi zero w - howto ?
Replies: 28
Views: 24291

Re: Fast boot (sub second) of pi zero w - howto ?

Often it's about user experience. Yep turn on PC, put kettle on, stare at screen, booting. Go make coffee, stare at the screen some more, booting Win 7. OS finally booted, run browser to check emails, stare at screen some more. That is current mainstream user experience. Wonder if there is an app t...
by Gavinmc42
Mon Jul 03, 2017 1:16 am
Forum: General discussion
Topic: High Speed Data Acquisition
Replies: 4
Views: 1447

Re: High Speed Data Acquisition

There is the SMI interface, mostly undocumented. This would need to be under DMA control, but I've no idea of any latency issues. This sort of stuff is normally handled by a FiFo/dual port ram. The ADC can clock the data into the ram and the Pi can suck it out the other side asynchronously. You need...
by Gavinmc42
Sat Jul 01, 2017 10:44 pm
Forum: General discussion
Topic: display controller
Replies: 2
Views: 1113

Re: display controller

Look at Adafruit's webpages.
Got info on 40pin TFT LCD and lipo chargers.
by Gavinmc42
Thu Jun 29, 2017 11:55 am
Forum: Troubleshooting
Topic: New firmware works bad when virtual framebuffer height >2400
Replies: 8
Views: 1579

Re: New firmware works bad when virtual framebuffer height >

pik33, I just got it.
Those extra rows are for your icons and blit images?
Wonder if you can figure out how to use the VC4 tile engines to move them around ;)
Don't remember anyone using the tile engines in baremetal apart from the cursor 64x64 tile engine.
by Gavinmc42
Thu Jun 29, 2017 11:45 am
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 10036

Re: Protecting Proprietary software from being copied.

The codec check is secure enough as the GPU is the one reading the OTP directly, so the return result can't easily be subverted. How much OTP is left and unused? Enough for a longer key than the serial number? Letting imagination run wild is where ideas become flying ducks, forums are where they ar...
by Gavinmc42
Thu Jun 29, 2017 11:14 am
Forum: General discussion
Topic: Pi Zero now available in multiples !
Replies: 15
Views: 3935

Re: Pi Zero now available in multiples !

Wonder if they are wave soldered or hand solder.
Hand soldered? then they are a bargain at that price :o
Let's all buy 50 each, watch supply dry up.

Wonder if this is the "announcement soon"?
Wait till tomorrows blog post, "only available to Code clubs" :lol:

I will try to contain my excitement.
by Gavinmc42
Wed Jun 28, 2017 1:45 pm
Forum: Camera board
Topic: PiKrellCam: motion vector detect + OSD web interface
Replies: 1511
Views: 397277

Re: PiKrellCam: motion vector detect + OSD web interface

I use a USB externally powered 3.5" caddy with currently a 3TB WD purple. First 1TB ran fine for 18months till it filled up. So much easier to use USB drives than network ones. One day I will figure out remote network drives :oops: I figure I have three plus years to figure it out before needing ano...
by Gavinmc42
Wed Jun 28, 2017 1:32 pm
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 10036

Re: Protecting Proprietary software from being copied.

I guess if you are using Linux then using Buildroot to make a kernel with just what you need in it. Remove all the external access stuff like serial console, ssh etc Can Buildroot handle encrypted file systems? PiCore boots into and runs from ram, like Ultibo once running you can pull the sdcard out...
by Gavinmc42
Wed Jun 28, 2017 2:34 am
Forum: Automation, sensing and robotics
Topic: Communicating with RPI on a drone
Replies: 4
Views: 1218

Re: Communicating with RPI on a drone

LoRa is good for this sort of stuff.
These make it a bit easier software wise.
https://www.adafruit.com/product/3178
by Gavinmc42
Tue Jun 27, 2017 12:58 pm
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 10036

Re: Protecting Proprietary software from being copied.

Ah, back in the good old days we used battery backed ram, opening the case disconnected the ram. Something we have been thinking about with Ultibo is net updating. The source is compiled to a kernel.bin specific to the Pi's serial number. But is the net safe? This could also be RE by comparing multi...
by Gavinmc42
Tue Jun 27, 2017 11:44 am
Forum: Beginners
Topic: Small trackpad / digitizers?
Replies: 2
Views: 2157

Re: Small trackpad / digitizers?

Touch screen form a LCD?
eBay should have them, 2.2" to 3.5" would be about the right sizes.
You then need a digitizer, i2c or SPI based A to D
by Gavinmc42
Tue Jun 27, 2017 11:18 am
Forum: Networking and servers
Topic: Running multiple pi's on a tractor
Replies: 26
Views: 5879

Re: Running multiple pi's on a tractor

I have a Pi security camera at the end of 20+m of cat 5 DIY PoE setup. 12Vin and a $2 12volt to 5V USB cigarette adapter, ripped open for the circuit. Been working for years. Only a 12m boom, thicker cable would be used and half the Pi's are only 6m away. Pay a bit more and I would use TO-220 Voltag...
by Gavinmc42
Tue Jun 27, 2017 10:58 am
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 10036

Re: Protecting Proprietary software from being copied.

I don't know much about it but they do come with Trustzone and crypto hardware built into the ARM chips. https://www.arm.com/products/security-on-arm/trustzone I have no idea how it is used or how to use it, anyone got good links? The V2 camera has a crypto chip, i2C version? Just guessing but I am ...

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