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by Gavinmc42
Wed Oct 17, 2018 5:04 am
Forum: General discussion
Topic: looking to build an arcade box in a flight case
Replies: 7
Views: 166

Re: looking to build an arcade box in a flight case

4 way Cigarette lighter sockets
https://www.techbrands.com/store/product/ps2019.aspx

You can plug those lighter to USB power supplies into them or use 12V direct for Monitor.
by Gavinmc42
Wed Oct 17, 2018 3:34 am
Forum: Automation, sensing and robotics
Topic: 1945 Craftsman lathe CNC Conversion
Replies: 7
Views: 237

Re: 1945 Craftsman lathe CNC Conversion

The other advantage I found with Mach3 is it is super commonly used (especially by professionals) so getting advice on it was very easy. Yep the only reason to not use a PC is because you want to learn how to do it on a Pi. Learning and using is not the same thing, especially if you actually want t...
by Gavinmc42
Tue Oct 16, 2018 1:19 am
Forum: General discussion
Topic: Getting Started with Raspberry Pi PID Temperature Controller
Replies: 1
Views: 93

Re: Getting Started with Raspberry Pi PID Temperature Controller

It is not really that hard. (unless you really want to do it in Linux). Temperature sensors and heater/blower controlled by solidstate relays. I do this for Real time Polymerase Chain Reactors (DNA replicator) , did not even need PID software. PWM not needed either as thermal time delays are quite l...
by Gavinmc42
Tue Oct 16, 2018 12:40 am
Forum: Automation, sensing and robotics
Topic: 1945 Craftsman lathe CNC Conversion
Replies: 7
Views: 237

Re: 1945 Craftsman lathe CNC Conversion

A lathe is normally only two axis. A Pi could control the steppers reasonably without extra hardware like an Arduino. Joan's pigpio is a good place to start and there is also a PiCNC effort now. To get smooth curves circular interpolation is required and this it timing critical. Usually the Linix OS...
by Gavinmc42
Sat Oct 06, 2018 8:34 am
Forum: openSUSE
Topic: How to turn on OpenGL on RPi 3B (Solved)
Replies: 7
Views: 351

Re: How to turn on OpenGL on RPi 3B

Try gpu_mem=16 , that is what Gentoo64 uses. And when you enable OpenGL driver in Raspbian it also becomes 16MB. Eric Anholt's driver negotiates for more if it needs it. Yep understand about switching distributions, I got me head around Debian and then piCore , tried Suse(failed). Lucky for me Sakak...
by Gavinmc42
Thu Oct 04, 2018 2:33 am
Forum: openSUSE
Topic: How to turn on OpenGL on RPi 3B (Solved)
Replies: 7
Views: 351

Re: How to turn on OpenGL on RPi 3B

You could use Gentoo64 instead, OpenGL works fine on that without tweaking.
I had trouble with Suse on Pi's, nearly none with Gentoo64.
by Gavinmc42
Fri Sep 28, 2018 5:56 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPI3B+)
Replies: 63
Views: 11102

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPI3B+)

Thanks Sakaki,
Just in time for our long weekend :D
by Gavinmc42
Thu Sep 27, 2018 6:13 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Need Advice: two 250hz square waves 180 out of phase @ 5V
Replies: 7
Views: 272

Re: Need Advice: two 250hz square waves 180 out of phase @ 5V

MAX30101 looks like a good chip, with the near identical MAX30105 used for air particle detection.
by Gavinmc42
Sat Sep 22, 2018 6:54 am
Forum: Gentoo
Topic: Mesa/OpenGL driver updating
Replies: 2
Views: 174

Mesa/OpenGL driver updating

Hi Sakaki,

Noticed there is a new release ofMesa3D
https://www.mesa3d.org/relnotes/18.2.1.html
Eric has some v3d bug fixes.
How do I keep the VC4 OpenGL driver up to date?

I can compile the Mesa examples etc fine but no clue on how to make a new driver.
by Gavinmc42
Fri Sep 21, 2018 8:52 am
Forum: Graphics programming
Topic: Embedded Graphics Development Platform?
Replies: 4
Views: 333

Re: Embedded Graphics Development Platform?

$30? hmm, a few YouTubes around. $52 Ozzie dollars plus shipping? 320x240? Xmas is coming will add it to my Santa list. Baremetal OpenVG Clock etc https://ultibo.org/forum/viewtopic.php?f=15&t=659&start=30 https://ultibo.org/forum/viewtopic.php?f=9&t=843 For graphic code testing I use USB boot mode ...
by Gavinmc42
Fri Sep 21, 2018 2:31 am
Forum: Beginners
Topic: So i can install a third party 64-bit Linux OS in RPi 3 B+
Replies: 12
Views: 707

Re: So i can install a third party 64-bit Linux OS in RPi 3 B+

Having 31 general purpose registers and 32 floating point registers makes a big difference (for example: if a function only uses scalar variables, then it is rare for the stack to need adjusting all the time). Have you tried using NEON in Aarch64? I think it should be much faster. I got ARM's Compu...
by Gavinmc42
Thu Sep 20, 2018 10:27 am
Forum: Beginners
Topic: So i can install a third party 64-bit Linux OS in RPi 3 B+
Replies: 12
Views: 707

Re: So i can install a third party 64-bit Linux OS in RPi 3 B+

Why do you want a 64-bit OS on a computer with only 1GB of RAM anyway? Plus the ram is only 32bit wide anyway so if anything it can be slower. But if you want to learn/play with Aarch64bit coding having a 64bit OS is handy. Gentoo64 is my current Pi favorite, very different from Debian based OS's. ...
by Gavinmc42
Thu Sep 20, 2018 3:59 am
Forum: General discussion
Topic: Pixy Camera
Replies: 11
Views: 5556

Re: Pixy Camera

BCM2835 on one side of PCB, image sensor on the other = Pixycam6? Could even be made smaller due to the pop memory on the BCM2835. It would run all Pi software too. And because it would be smaller at Pi Zero's speed, ie 1GHz . One day Zeros will be A35 based Aarch64 and the BCM2835's are freed up fo...
by Gavinmc42
Wed Sep 19, 2018 3:55 am
Forum: Beginners
Topic: Raspbian Stretch not 64bit?
Replies: 35
Views: 13827

Re: Raspbian Stretch not 64bit?

Are you sure you got a 64bit version?

I use Gentoo64 on my Pi3B+'s
Have not tried MongoDB etc but Gentoo64 comes with lots of stuff so I'm not sure.
by Gavinmc42
Fri Sep 14, 2018 10:46 am
Forum: Camera board
Topic: Transmitting video signal
Replies: 6
Views: 256

Re: Transmitting video signal

Pi's have a analog TV output, plug that into a 5.8GHz RPV transmitter.

You are just using a Pi instead of the normal tiny analog FPV camera.
You could even do text overlay, ie GPS position.
by Gavinmc42
Thu Sep 13, 2018 2:55 am
Forum: General discussion
Topic: High Endurance SD card
Replies: 42
Views: 8675

Re: High Endurance SD card

I now use A1 rated cards for Raspbian and Gentoo64 but for 24/7 Pi's I use PiCore Linux as it reads the OS into ram and runs from that. For baremetal Pi gadgets I have less need for massive memory and I prefer smaller sized SLC cards. The higher capacity cards have less rewrite cycles and cost much ...
by Gavinmc42
Wed Sep 12, 2018 5:14 am
Forum: General discussion
Topic: Looks like Firefox is now officially unsupported in Raspbian
Replies: 13
Views: 636

Re: Looks like Firefox is now officially unsupported in Raspbian

Whoops, forgot Eric's work on OpenGL/VC4/mesa which Gentoo64 is using.
Three peoples work, plus help from many others ;)
by Gavinmc42
Wed Sep 12, 2018 5:10 am
Forum: General discussion
Topic: Looks like Firefox is now officially unsupported in Raspbian
Replies: 13
Views: 636

Re: Looks like Firefox is now officially unsupported in Raspbian

However, if I switch, I'll miss much of the fun on these forums. I know, I find I am actually using Gentoo64 to do work, how crazy it that :lol: Mind you learning OpenGL and Blender is hard work ;) NeddySeagoon's efforts to port Rust before compiling Firefox was a saga in itself. And Sakaki's great...
by Gavinmc42
Wed Sep 12, 2018 12:30 am
Forum: General discussion
Topic: Looks like Firefox is now officially unsupported in Raspbian
Replies: 13
Views: 636

Re: Looks like Firefox is now officially unsupported in Raspbian

Time to move to Gentoo64? Firefox works there, handled 30 tabs fine. The trend is for heavy metal apps like browsers to move towards 64bits. Most Desktops and Smart Phones/Tablets now run 64bit CPUs. Not sure how much longer Raspbian can hang in on 32bit, 2-3years? Probably forever as Pi's are now r...
by Gavinmc42
Tue Sep 11, 2018 11:36 pm
Forum: General programming discussion
Topic: raspi taking photo on boot every day at 10past and 50past
Replies: 13
Views: 465

Re: raspi taking photo on boot every day at 10past and 50past

You can do a sequential filename by writing the name of the image file into a file and then next time cron fires your script the script reads the fillename out of the file and increments it then writes it back. Or if you have a network connection or RTC use a file name with the timestamp in it. You ...
by Gavinmc42
Tue Sep 11, 2018 8:41 am
Forum: General programming discussion
Topic: Truly portable lightweight GUI toolkit?
Replies: 17
Views: 814

Re: Truly portable lightweight GUI toolkit?

That Nuklear looks very interesting, modern flat style too. https://rawgit.com/vurtun/nuklear/master/doc/nuklear.html Usage To draw all draw commands accumulated over a frame you need your own render backend able to draw a number of 2D primitives. This includes at least filled and stroked rectangles...
by Gavinmc42
Tue Sep 11, 2018 8:32 am
Forum: Bare metal, Assembly language
Topic: Accelerated graphics
Replies: 53
Views: 7708

Re: Accelerated graphics

Pascal?
Show your teacher this, it's ozzie too :D
https://ultibo.org/
And yes accelerated graphics works now.
by Gavinmc42
Tue Sep 11, 2018 7:26 am
Forum: Raspbian
Topic: Will people please think about low res displays?
Replies: 45
Views: 1428

Re: Will people please think about low res displays?

I just got a Waveshare 480x320 3.5", that Raspbian sort of works at all is amazing :lol: 800x480 is much nicer, but it was for testing DIY GUI's I got the smaller display for. Have yet to try the 240x240 1.5" :lol: Even now I have found Retropie gets faster FPS on 320x240 and it too slow without spe...
by Gavinmc42
Tue Sep 11, 2018 6:37 am
Forum: Raspbian
Topic: Less X?
Replies: 18
Views: 540

Re: Less X?

I have been using Gentoo64 on Pi3B+'s which is using the latest OpenGL driver. For 3D - Blender for Artists which is Blender with an easy to learn UI which also uses OpenGL. FreeCAD for other STL stuff. OpenGL can run without X11, same with OpenVG/GLES. X11 does the Windowing stuff? So do it without...
by Gavinmc42
Tue Sep 11, 2018 5:11 am
Forum: General programming discussion
Topic: Truly portable lightweight GUI toolkit?
Replies: 17
Views: 814

Re: Truly portable lightweight GUI toolkit?

Anyway, that program required a lot of memory so I used the Watcom C compiler that could generate 32 bit code and access all the megabytes of the new 386 based PC's that were coming along. All in a flat address space, none of that old 64K segmented memory of the DOS world. It still lives :o http://...

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