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by Gavinmc42
Mon Sep 16, 2019 9:33 am
Forum: Media centres
Topic: Dual output for 3D stereo projection?
Replies: 20
Views: 577

Re: Dual output for 3D stereo projection?

Are you using shutter glasses? I have programmed the General purpose clock output 0 on the older Pi's GPIO. If you use the HDMI clock as the source input, it might divide down and sync. With 4K the best will be 30Hz? That might be noticeable. You might have to wait for the new BCM2711 peripheral man...
by Gavinmc42
Mon Sep 16, 2019 9:21 am
Forum: Graphics programming
Topic: RayLib and Geany
Replies: 5
Views: 271

Re: RayLib and Geany

Also try NanoVG, some have got that going. I use Geany but for very simple stuff.. Raylib does VR stereo :o Wonder when Pi4 will be supported? I think with Pi4 you have to use OpenGL 3.0 and the driver also support OpenGLES 3.? Use those in 2D with Z = 0? I'm still unsure if the VC6 has the VG regis...
by Gavinmc42
Mon Sep 16, 2019 9:06 am
Forum: Media centres
Topic: Dual output for 3D stereo projection?
Replies: 20
Views: 577

Re: Dual output for 3D stereo projection?

You might have to do a google. I found a -stereo option for glxgears http://linuxcommandlibrary.com/man/glxgears.html This looks interesting https://hub.packtpub.com/rendering-stereoscopic-3d-models-using-opengl/ https://www.mesa3d.org/intro.html I did not have much trouble with compiling the demo e...
by Gavinmc42
Mon Sep 16, 2019 8:42 am
Forum: Advanced users
Topic: Think to install Ubuntu desktop os in raspberry pi 4
Replies: 2
Views: 296

Re: Think to install Ubuntu desktop os in raspberry pi 4

If/when Ubuntu ARM get ported to the Pi4 it will probably be at least 19.x not 18.x. You might need Linux Kernel 5+ and Mesa 19.2+. That is going to be newer releases, not old ones, unless someone knows how to back port. Generally it has been the Server version not the Desktop version on ARM. I thin...
by Gavinmc42
Mon Sep 16, 2019 8:32 am
Forum: Media centres
Topic: Dual output for 3D stereo projection?
Replies: 20
Views: 577

Re: Dual output for 3D stereo projection?

Sure, do you know what software can do this?

I got Openkinect to compile, but no luck yet with VRui
https://arsandbox.ucdavis.edu/technical ... s/vrui-vr/
by Gavinmc42
Sun Sep 15, 2019 7:33 am
Forum: Beginners
Topic: No background with programming
Replies: 9
Views: 365

Re: No background with programming

Socratica - Decidedly more jazzy than Corey
Who's Corey?

Nice vids, it's convinced me I should be doing Python on Baremtal Pi's if I want my robots to take over the World.
by Gavinmc42
Sun Sep 15, 2019 7:14 am
Forum: Bare metal, Assembly language
Topic: Announce: RusPiRo - a kernel the Rust way ;)
Replies: 51
Views: 4483

Re: Announce: RusPiRo - a kernel the Rust way ;)

https://www.funtoo.org/Welcome Is there a Linux OS that is optimised for best performance on Aarch64? Anyway the point is to get away from Linux. Are you a "nightly build" Rust tester? Rust updated 16 minutes ago, Crates-io-index 2 minutes ago :lol: One thing that surprises me is how well some Laz/F...
by Gavinmc42
Sun Sep 15, 2019 4:49 am
Forum: Beginners
Topic: [How can i run a bash script on boot with Pi 4B /4GB]
Replies: 3
Views: 138

Re: [How can i run a bash script on boot with Pi 4B /4GB]

My scripts wait until there is a valid IP address.
Then they send me an email so I know what it is.
It can take some time before the server on a network assigns it.
30 secs after booting is not unusual.
by Gavinmc42
Sun Sep 15, 2019 12:25 am
Forum: Bare metal, Assembly language
Topic: Circle - C++ bare metal environment (with USB)
Replies: 231
Views: 59393

Re: Circle - C++ bare metal environment (with USB)

I'm aiming for Ethernet, USB & HDMI as Linux only and everything on the 40 pin extender as bare metal. Run a RTOS on a baremetal Arm core for GPIO while Linux on the other core handles the comms? I think some guys are trying something like that. WiFi is almost impossible to do baremetal so far, ass...
by Gavinmc42
Sun Sep 15, 2019 12:18 am
Forum: Bare metal, Assembly language
Topic: Announce: RusPiRo - a kernel the Rust way ;)
Replies: 51
Views: 4483

Re: Announce: RusPiRo - a kernel the Rust way ;)

I suspect Gentoo is better and keeping things more recent than Debian/Raspbian but still. Yep, much better, Gentoo64 has RustC 1.37.0. Unlike Raspbian it stays current, GCC is 9.2. LLVM/clang 8.0.1.... I noticed when I first started using it Mesa/OpenGL was current and worked better than Raspbian. ...
by Gavinmc42
Sat Sep 14, 2019 11:22 am
Forum: Bare metal, Assembly language
Topic: Announce: RusPiRo - a kernel the Rust way ;)
Replies: 51
Views: 4483

Re: Announce: RusPiRo - a kernel the Rust way ;)

Been years since I use Rust, things are better now ;)
http://arewegameyet.com/#games

Rust comes pre-installed on Gentoo64 :D
Will those OpenGLES engines port to baremetal?
There looks to be bunch of stuff that could potentially be useful in baremetal?
Or if not, some coding fun in x11.
by Gavinmc42
Sat Sep 14, 2019 11:03 am
Forum: Bare metal, Assembly language
Topic: Clean, OS-independent Pi programming using C/C++
Replies: 11
Views: 807

Re: Clean, OS-independent Pi programming using C/C++

There are some game libs for Rust now. http://arewegameyet.com/ May not be suitable for baremetal yet, but fun to make games in something else besides C/C++ or Python. Just got libkinect to compile, VRui failed, so a Pi4 AR Sandpit is still some work away. AR Sandpit in Rust? One of my target gadget...
by Gavinmc42
Sat Sep 14, 2019 7:01 am
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 40
Views: 2464

Re: Multiple Pi's to replace W10

Need to wait for netboot, it's not ready on Pi4's
You could practice with Pi3's.
uSD's are the next CDROM, easier to use on Pi's too.
Or USB stick, as there are more ports for them.
by Gavinmc42
Sat Sep 14, 2019 6:16 am
Forum: Bare metal, Assembly language
Topic: Clean, OS-independent Pi programming using C/C++
Replies: 11
Views: 807

Re: Clean, OS-independent Pi programming using C/C++

Thanks Heater, bookmarked. Andre's Rust version has really improved since I looked at it last. I do wish they would update that Cambridge OS tut. Yep, we should have linked to Circle++ as that's what you asked for. https://github.com/rsta2/circle Peter's is anther you need to bookmark https://github...
by Gavinmc42
Sat Sep 14, 2019 5:52 am
Forum: General discussion
Topic: Looking for a mounting solution for RPi (in case)
Replies: 12
Views: 646

Re: Looking for a mounting solution for RPi (in case)

Or mine :lol: There is a reason I prefer compact keyboards, no room for bigger ones. I have had one stack in the corner for years, for the security Pi's basestation made from a hardware store DIY 300x600mm wide shelf $5. Two 90 degree shelf brackets, one front and back keep it upright. The shelf is ...
by Gavinmc42
Sat Sep 14, 2019 5:14 am
Forum: Gentoo
Topic: QT issues
Replies: 6
Views: 480

Re: QT issues

Dual 32/64Bit Buster? Good point, I do need to test that more.
Time to build that mini bramble cluster.

Debian builds are easier even if they are not up to date as much as Gentoo.
Two different OS's might give clues to why one is better/fix the other.
by Gavinmc42
Sat Sep 14, 2019 2:38 am
Forum: Bare metal, Assembly language
Topic: Clean, OS-independent Pi programming using C/C++
Replies: 11
Views: 807

Re: Clean, OS-independent Pi programming using C/C++

Is there any expected timescale for at least a testable version of Ultibo for Pi4 ? Depend on lots of things, I'm just a Ultibo user and have no inside info. More hardware was changed on the Pi4 than any previous version. A72, VC6, USB, Ethernet... The BCM2835 peripheral manual was available and lo...
by Gavinmc42
Fri Sep 13, 2019 12:30 pm
Forum: Gentoo
Topic: D language
Replies: 5
Views: 329

Re: D language

Time to relearn GCC compiling ;) I will need to install the armhf cross compiler for those old dinosaurs 32bit Pi's. I had no luck with DMD and LDC. But Nim did build and Zig is building now Two newer languages that were on my list. Hey is that a Mate Desktop for Gentoo? Someone was after a Mate OS ...
by Gavinmc42
Fri Sep 13, 2019 9:11 am
Forum: Gentoo
Topic: QT issues
Replies: 6
Views: 480

Re: QT issues

Or I can wait for all the PY3/QT5 etc issues to get sorted by the developers of those apps :lol: I feel no need to go backwards and someine smarter will figure it out eventually. Anyway found a Gentoo guy interested in 3D CAD stuff, will try some of these. https://github.com/waebbl/waebbl-gentoo/blo...
by Gavinmc42
Fri Sep 13, 2019 8:53 am
Forum: General discussion
Topic: Third party OS using pi 4
Replies: 16
Views: 880

Re: Third party OS using pi 4

If you only want 64 then Gentoo64 works. There is also a 64bit kernel for Raspbian that you can try Buster with now. Both work well but I have not really used them got GPIO stuff yet. Other are in the works, Arch, Alpine, Ubuntu 19 etc but I have trouble getting them to work. Just wait a few months ...
by Gavinmc42
Fri Sep 13, 2019 3:00 am
Forum: Gentoo
Topic: D language
Replies: 5
Views: 329

Re: D language

It turns out there is 3 versions of D compilers :o DMD, GDC, LDC FYI - GDC can be built as part of GCC if d enabled https://wiki.dlang.org/GDC Only C, C++, Fortran are in your current 9.2.0 GCC release. Anyway, many versions for me to play with. https://wiki.dlang.org/Bare_Metal_ARM_Cortex-M_GDC_Cro...
by Gavinmc42
Thu Sep 12, 2019 6:13 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 558
Views: 157065

Re: Raspberry Pi 4 temperature

No one bought Pi's because of their performance, I did, faster, cheaper and much easy to use than Microchip Arduino mega PCB's with Ethernet hat. If I had known how much trouble Linux would cause me, I might have chosen differently :lol: As to what drives Pi sales, Cost, Qualitiy, Performance. It i...
by Gavinmc42
Thu Sep 12, 2019 5:55 am
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 40
Views: 2464

Re: Multiple Pi's to replace W10

Some computer languages allow splitting among computers, Erlang? There is probably lots for things that might just work when recompiled for Pi's. It really depends on how clean the code is, assembler optimisations will cause problems. I am running Desktop GIS software now, not just one but two of th...
by Gavinmc42
Thu Sep 12, 2019 5:32 am
Forum: General discussion
Topic: run several pis from desktop
Replies: 14
Views: 394

Re: run several pis from desktop

Who sells the notebook together with n pi4Bs with booting cards all attached to a big powersupply Might have to bring your own notebook, but if you want a bunch of powered PI's. http://www.bitscope.com/product/blade/?p=about WiFi with 1000 PI's :o yep a software problem for sure. Don't get too clos...
by Gavinmc42
Thu Sep 12, 2019 5:20 am
Forum: General discussion
Topic: Pi4 laptop or Tablet
Replies: 19
Views: 1565

Re: Pi4 laptop or Tablet

Make your own battery bank with cells in series with a step down converter. Battery voltage will then give you some warning. Probably have to make you own charger too. That's why I'm going for cordless drill batteries and chargers, ugly as they are. Not sure if SSD's are more voltage tolerant than u...

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