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by Gavinmc42
Fri Jul 10, 2020 10:58 am
Forum: Off topic discussion
Topic: Pis...the answer is Pis!
Replies: 22
Views: 861

Re: Pis...the answer is Pis!

I edited the flu map link. I started from the A's - 1995 to 2020. Did the WHO only collect data from 2009? Nope, Germany, Iceland have data. H1N1 was the first of the big flu's? https://en.wikipedia.org/wiki/Pandemic_H1N1/09_virus It looks like we have been getting swine flu since 2009 Oh look they ...
by Gavinmc42
Fri Jul 10, 2020 6:42 am
Forum: Off topic discussion
Topic: Pis...the answer is Pis!
Replies: 22
Views: 861

Re: Pis...the answer is Pis!

We are the descendants of survivors of every previous plague in history. So far 36 dead of flu in Oz for 2020. I used my Pi to get this pic of the last 20 years for the US :D Oz, US, UK, France.. graphs are similar Edited - https://www.who.int/influenza/gisrs_laboratory/flunet/charts/en/ Strange how...
by Gavinmc42
Fri Jul 10, 2020 1:22 am
Forum: Troubleshooting
Topic: Chromium is slow on a Raspberry Pi 4
Replies: 11
Views: 812

Re: Chromium is slow on a Raspberry Pi 4

Did the same thing and Chromium got very slow.
Updated from ver 80 to 83.
Latest 83 build is a better than the first 83 build.

I am now running this one after another update/upgrade.
Version 83.0.4103.116 (Developer Build) built on Debian 10.4, running on Debian 10.4 (64-bit)
by Gavinmc42
Fri Jul 10, 2020 12:48 am
Forum: Off topic discussion
Topic: Pis...the answer is Pis!
Replies: 22
Views: 861

Re: Pis...the answer is Pis!

A small USB uSD card readers plug into the Pi keyboard USB slots and work fine for reading and writing cards. Small plastic snack box from the supermarket can hold lots of backup uSD cards with many different OS's on them. I have three snack boxes, one for uSD/SD's, one for USB sticks, one for the U...
by Gavinmc42
Fri Jul 10, 2020 12:35 am
Forum: Other projects
Topic: Motorcycle Speedometer
Replies: 11
Views: 345

Re: Motorcycle Speedometer

https://www.youtube.com/watch?v=iH9lp-Nms-o
Can your screen be seen in bright daylight/sunlight?
Not many LCD screens can.
Transflective are the better ones, but almost all Pi usable screens are transmissive?

Will Clearink displays make it to big production qty?
by Gavinmc42
Fri Jul 10, 2020 12:25 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

That Skywater link is interesting.
I use Cypress PSoC microcontrollers, they have CPLDs buried in them.

The number of macrocell equivalents vary by version. 32 to 396 MC?
They even use the old CPLD Warp software for the Verilog compiling.
by Gavinmc42
Tue Jul 07, 2020 2:13 am
Forum: Linux Kernel
Topic: Status of Raspberry Pi 4 in Mainline
Replies: 27
Views: 10812

Re: Status of Raspberry Pi 4 in Mainline

How does that work if booting from SSD on USB3?
The VL805 driver wold need to be in the bootloader EEPROM?
by Gavinmc42
Tue Jul 07, 2020 2:04 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

Verilog -A is an analog extension https://en.wikipedia.org/wiki/Verilog-A Wonder if Verilog can handle Ternary Logic? https://en.wikipedia.org/wiki/Three-valued_logic https://en.wikipedia.org/wiki/Ternary_computer https://rosettacode.org/wiki/Ternary_logic Ternary is closer to fuzzy logic and simila...
by Gavinmc42
Tue Jul 07, 2020 12:34 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

https://blog.degruyter.com/algorithms-suck-analog-computers-future/ Had an analog computer in my first car, Volvo 164TE. Worked in a company that made them for Combine Harvester grain harvesting efficiency monitors. Op amps and filter, programming was adjusting trim pots. I use PSoC microchips, shou...
by Gavinmc42
Mon Jul 06, 2020 12:08 pm
Forum: Graphics programming
Topic: 1000 Triangles on a Pi 4 at 60 fps - No Problem
Replies: 1
Views: 417

Re: 1000 Triangles on a Pi 4 at 60 fps - No Problem

Try the ipers mesa demo, I get 5290 polygons at 60fps.
https://github.com/freedesktop/mesa-dem ... /src/demos
Plenty of demos there to play with.

I have wanted to try graphics with D, tried most of the others, never tried C#.
Python is pretty handy to swap between PC and Pi's
by Gavinmc42
Mon Jul 06, 2020 11:36 am
Forum: Camera board
Topic: diy autofocus with /dev/video16 and stepper motor?
Replies: 26
Views: 1193

Re: diy autofocus with /dev/video16 and stepper motor?

I have used toothed belts inside out on flat pulleys.
Spring loaded tension pulley.
But these were on ball bearing shafts.

Perhaps some sort of torque control on the stepper.
Good stepper motor drivers have adjustable current limits.
by Gavinmc42
Mon Jul 06, 2020 11:31 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

I meant DRAM like, as in addressable memory array. Don't remember the exact article, it was months ago, pre lockdown, which is a different universe now. https://www.nature.com/articles/s41377-019-0151-0 https://onlinelibrary.wiley.com/doi/full/10.1002/admt.201900037 https://www.intechopen.com/books/...
by Gavinmc42
Mon Jul 06, 2020 6:53 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

NN done with NVM like a dram chip are starting to appear.
Imagine if it can be stacked onto a Dram die.

Buy a dram chip with NN.
Micron have the 3D X-point tech.
by Gavinmc42
Mon Jul 06, 2020 2:25 am
Forum: Camera board
Topic: diy autofocus with /dev/video16 and stepper motor?
Replies: 26
Views: 1193

Re: diy autofocus with /dev/video16 and stepper motor?

If you keep the lighting controlled and autowhite balance etc off then the maximum jpeg file size is when the lens is at the focus point.
Made a jig to do this for a security camera production line more than a decade ago.
Very sensitive to stray light changes so a sealed box helps.
by Gavinmc42
Mon Jul 06, 2020 2:16 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

I watch Lex Fridman, he had some Tesla autopilot guys. The Tesla autopilot hardware is probably the closest to real world there is. It has CPUs, GPUs and NNs. The coding is getting better, going from CPU to GPU to NN. They can do this because they collect all the data for training. They have a train...
by Gavinmc42
Sun Jul 05, 2020 11:09 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 511
Views: 137525

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Sound is working on analog with DVI outputs. Might have been fixed with the genup I did yesterday? There is now a drop down selection option in the volume mixer, selecting the analog headphone works. Autodetect is not working? Probably just me getting used to the 4.19 to 5.4 changes :oops: Now have ...
by Gavinmc42
Sun Jul 05, 2020 9:03 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 511
Views: 137525

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Got Vulkan 64bit working on Raspberry Pi OS ;) https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=277125&p=1690769#p1690769 Will try it in Gentoo64. Got a suspicion about the audio from testing on Raspberry Pi OS. When HDMI monitor is plugged in, three channels are set in amixer - HDMI1, HDMI2,...
by Gavinmc42
Sun Jul 05, 2020 7:27 am
Forum: Advanced users
Topic: Is there a rapid shutdown?
Replies: 3
Views: 214

Re: Is there a rapid shutdown?

I use PiCore Linux.
Runs from ram, only writes when you tell it to.
I can even take the SD card out while it is running without problems.
by Gavinmc42
Sun Jul 05, 2020 7:23 am
Forum: General discussion
Topic: I cannot install ROS kinetic in RPI4, Did somebody get it?
Replies: 15
Views: 3410

Re: I cannot install ROS kinetic in RPI4, Did somebody get it?

Well done.
One more thing that can be ticked off the list of things to check on Pi4's.

You might want to have a look at the new OpenVX, saw it in the Pi blog.
OpenCV scares me, like ROS it is big and takes a lot of learning ;)
by Gavinmc42
Sun Jul 05, 2020 7:17 am
Forum: Graphics programming
Topic: Script to build development Vulkan driver and demos
Replies: 23
Views: 1036

Re: Script to build development Vulkan driver and demos

Linux raspberrypi 5.4.47-v8+ #1322 SMP PREEMPT Wed Jun 17 18:05:46 BST 2020 aarch64 GNU/Linux Did not delete mesa, just renamed them and then git the new one. I end up with a "broadcom_icd.aarch64.json" file and change the path to that name. Could have missed another needed change for 64bit? EDIT- ...
by Gavinmc42
Sun Jul 05, 2020 7:00 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 511
Views: 137525

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Sakaki, porthole seems to have disappeared, I generally use it to find out were software and libs are hiding before doing CLI emerge.

Still having audio issue when using HDMI to a DVI monitor and audio out the analog jack to amplified speakers. No sounds.
HDMI sound is fine on a TV.
by Gavinmc42
Sun Jul 05, 2020 6:53 am
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 208
Views: 28869

Re: STICKY: Raspberry Pi OS (64 bit) beta test version feedback

Chromium 83 is extremely painful to use, I had no problem with 80.
Is there a way to roll back with apt-get update?
by Gavinmc42
Sun Jul 05, 2020 6:50 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 1667

Re: FPGA Development Software for RPI 4?

Just FWIW, I'm working on a Linguistic AI project that I'm writing in Python using CODE-OSS on a Raspberry Pi. I'm also using eSpeak as the voice and CMU PocketSphinx as the speech recognition engine. In addition to that I'm learning about perceptrons which I'm also programming in Python. My ultima...
by Gavinmc42
Sun Jul 05, 2020 12:32 am
Forum: Graphics programming
Topic: Script to build development Vulkan driver and demos
Replies: 23
Views: 1036

Re: Script to build development Vulkan driver and demos

pi@raspberrypi:~/sascha-willems/build/bin $ ./gears
Could not create Vulkan instance :
ERROR_INITIALIZATION_FAILED
Same issue. Path? Must have missed a step
Everything compiles fine.
by Gavinmc42
Sun Jul 05, 2020 12:05 am
Forum: Gaming
Topic: Warzone2100
Replies: 3
Views: 169

Re: Warzone2100

Got it to work on Gentoo64 :D Sakaki also keeps Gentoo64 ahead of the more stable Raspberry Pi OS which is based on Debian. Only needed three dependencies as Gentoo64 usually has more stuff install by default than Raspberry Pi OS. I am growing to like the AR mod, I can zoom in closer and see more de...

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