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by Gavinmc42
Mon Oct 14, 2019 3:02 am
Forum: Gentoo
Topic: Buildroot
Replies: 3
Views: 443

Re: Buildroot

I forgot to add I built the SiFive RISC-V OS while I was doing a genup.
The 4GB Pi4 made it through that stress test :D
All four cores maxed out and most of the memory in use.

Gentoo64 is proving to be pretty rock solid.
by Gavinmc42
Mon Oct 14, 2019 2:16 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 241
Views: 19262

Re: Pi4 as Desktop computer

Any trick to getting FreeCAD 19 working, that version is very new? I have been busy with BuildRoot making Linux Kernel/OS's for Pi0-1's and SiFive boards. Making kernels has now been ticked off my list. By the time USB boot drives are working on PI4's there will be a lot of software that just works....
by Gavinmc42
Mon Oct 14, 2019 1:49 am
Forum: Gentoo
Topic: Buildroot
Replies: 3
Views: 443

Re: Buildroot

Can I make a RISC-V kernel? Yes - to answer my own question. I picked the SiFive board and about 3-4hours later I had a kernel. So that is a cross compiled kernel/OS for RISC-V on an aarch64 box. Nothing to test it on :( . Got some old Beaglebones at work, try them next. Then a 1GB Pi4 aarch64 kern...
by Gavinmc42
Sun Oct 13, 2019 11:10 am
Forum: Gentoo
Topic: Buildroot
Replies: 3
Views: 443

Re: Buildroot

Turns out Buildroot makes a file called sdcard.img, just dd it to a uSD card and voila, a new Pi OS :D It only takes a long time to build the first version as it must install all the tools and source files. Doing a new version with something added/removed and rebuilding is only few minutes. I used B...
by Gavinmc42
Sun Oct 13, 2019 6:30 am
Forum: General discussion
Topic: PrintDrone wall printing graffiti drone
Replies: 5
Views: 313

Re: PrintDrone wall printing graffiti drone

Could make this less reliant on cherry pickers
http://siloarttrail.com/
How long before drones can do it safer and faster than humans?
by Gavinmc42
Sun Oct 13, 2019 12:28 am
Forum: Compute Module
Topic: PI 4 Compute module with pci-e?
Replies: 56
Views: 15377

Re: PI 4 Compute module with pci-e?

I think someone said a Model Pi4A has been ruled out?
And a Compute4 is still ????

Who said that?
The decision was made that there will never be a Pi4A.
https://www.raspberrypi.org/forums/view ... 3&t=250303

Never say never?
A different connector than USB3 for the PCI-e?
by Gavinmc42
Sat Oct 12, 2019 12:19 pm
Forum: Compute Module
Topic: PI 4 Compute module with pci-e?
Replies: 56
Views: 15377

Re: PI 4 Compute module with pci-e?

I think someone said a Model Pi4A has been ruled out? And a Compute4 is still ???? That PCI-e hack that uses a USB3 cable gave me an idea. Why not a Model 4A but with a USB 3 connector connected to the PCI-e pins. USB2 via the USB-C like the existing Pi4B. Still keep the Model 3A+ footprint, but wit...
by Gavinmc42
Sat Oct 12, 2019 11:58 am
Forum: Gentoo
Topic: Buildroot
Replies: 3
Views: 443

Buildroot

More stress testing the Pi4 /Gentoo64 Desktop PC combo :D Can Gentoo64 and a Pi4B4 compile a Pi Linux OS. Yes it can. This did not work on Buster or a Pi3B+ or 16GB uSD. I ended up with a new Gentoo64 1.5.1 on a 32GB uSD. Downloaded and unzipped the Buildroot tool https://buildroot.org/download.html...
by Gavinmc42
Sat Oct 12, 2019 6:23 am
Forum: General discussion
Topic: Pi 4B 2019 - after extensive usage shows a thermometer on the TOP/RIGHT Corner
Replies: 2
Views: 176

Re: Pi 4B 2019 - after extensive usage shows a thermometer on the TOP/RIGHT Corner

The thermometer is normal, working hard in closed case without heatsink and fan will do this.

I usually have a small heatsink and the top off the case, this keeps temp down around 60C.
Not much cooling is needed, if I have the room roof fan on it cools down to 40+C.


GTK? probably mssing library.
by Gavinmc42
Sat Oct 12, 2019 5:59 am
Forum: General discussion
Topic: AVR assembler
Replies: 10
Views: 126

Re: Pi4 as Desktop computer

Try OpenOCD.
Adafruit use it for their production programming.
Flashrom also works.
by Gavinmc42
Sat Oct 12, 2019 5:55 am
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 1116

Re: Programming languages support

Thanks Tim, that's got it, much better on a Pi4 :D . Need to see if there is an Aarch64 version for Gentoo64. If not, time to learn how to make it. A baremetal version is possible? Er, Google found me back in April talking about this and Dynabook. Still have that Byte 1981 mag somewhere. I suppose L...
by Gavinmc42
Sat Oct 12, 2019 5:09 am
Forum: Raspbian
Topic: FreeCAD on PI4 and Raspbian Buster.
Replies: 55
Views: 6011

Re: FreeCAD on PI4 and Raspbian Buster.

we've hit a dead end on fixing the segmentation fault problem. I have run into seg faults during compiles etc when Pis runs out of memory. Happens on Pi3's and smaller 4's. Not sure if it is GPU/CPU memory clash, but that is my theory at the moment. Need to make it repeatable before I can say that ...
by Gavinmc42
Sat Oct 12, 2019 12:01 am
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 1116

Re: Programming languages support

do hope it was not with apt-get
:oops: Guilty.
Perhaps time to try a newer version?
by Gavinmc42
Fri Oct 11, 2019 2:27 am
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 1116

Re: Programming languages support

Finally plugged the second screen into the home Pi4 last night. Went looking for Interpreted languages. Browser instructions in one window, compiling in the other, so easy now. Weird and small ones, just grabbed the git and most just "make'd. I did this in Buster 32 and Gentoo64 on a Pi4 A couple of...
by Gavinmc42
Thu Oct 10, 2019 1:00 am
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 1116

Re: Programming languages support

https://squeak.org/
Wonder if there is a an Aarch64 version?
by Gavinmc42
Wed Oct 09, 2019 11:30 am
Forum: OpenGLES
Topic: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)
Replies: 45
Views: 6049

Re: RPi 4 OpenGL ES 3.0 ShaderToy to download (100+ examples)

Might need some help file reading, but I got this to compile on Gentoo64 and a Pi4 :D
Not sure if it is working properly, seemed to have compiled as GLFW?

Bookmarked your Book of Shaders too, bedtime reading.
47fps on a Pi Zero :o
by Gavinmc42
Wed Oct 09, 2019 6:38 am
Forum: Graphics, sound and multimedia
Topic: Dual Monitors With Raspberry Pi 3: Is It Possible?
Replies: 6
Views: 224

Re: Dual Monitors With Raspberry Pi 3: Is It Possible?

What about one HDMI and one composite on a Pi4?
Does the Pi4 share the same pipeline for both HDMI's?
by Gavinmc42
Wed Oct 09, 2019 1:29 am
Forum: Off topic discussion
Topic: Best Raspberry Pi Alternatives 2019
Replies: 62
Views: 4876

Re: Best Raspberry Pi Alternatives 2019

I've been ignoring the main guys while living in Piland.
Interesting "Fanless" embedded stuff coming from Intel and AMD.
Some big heatsinks though :D
They say for embedded Display market etc?
Even triple HDMI boards, I wonder why?.

Is doe300 is still around and working on OpenCL for Pi4/VC6?
by Gavinmc42
Wed Oct 09, 2019 12:22 am
Forum: General discussion
Topic: Portable Monitor for raspberry pi?
Replies: 29
Views: 1052

Re: Portable Monitor for raspberry pi?

LiPO's and Li-Ion can be paralleled HobbyKing and Tesla do it. But circuit efficiency mean series connected cells and then a step down converter is better. Power banks step up 3.7-4.2volt cell to 5V, there is a higher % loss in conversion stepping up. The currents are higher so parts are more expens...
by Gavinmc42
Tue Oct 08, 2019 6:20 am
Forum: General discussion
Topic: Am I the only one that still would buy a Raspberry Pi 3b+?
Replies: 59
Views: 1738

Re: Am I the only one that still would buy a Raspberry Pi 3b+?

I prefer to baremetal my apps, cannot do that yet on a Pi4 so the 3B+ is it. Mind you, baremetal was to get around the limitations of the Pi hardware. Now the Pi4 has way less limitations, just now it is hard to use less than 2-4GB of uSD for Raspbian. But again a Zero or B+ is way more grunt than i...
by Gavinmc42
Mon Oct 07, 2019 8:10 am
Forum: Off topic discussion
Topic: Best Raspberry Pi Alternatives 2019
Replies: 62
Views: 4876

Re: Best Raspberry Pi Alternatives 2019

The Nvidia Jetson range is impressive and so is their pricing :lol:
Professional pricing not home hacking firmware.
Would have to make a very strong case to the finance manager to get those approved for home use.
by Gavinmc42
Mon Oct 07, 2019 1:22 am
Forum: General discussion
Topic: Portable Monitor for raspberry pi?
Replies: 29
Views: 1052

Re: Portable Monitor for raspberry pi?

Batteries are a bit tricky, even Pi's chew power. The Pi4 plus a display is into laptop power requirements. Laptop battery power supplies are typically around 19 volts. Cordless drill packs are now around that voltage :idea: Watched the local Aldi for their battery packs and chargers to go on specia...
by Gavinmc42
Sun Oct 06, 2019 12:25 pm
Forum: General discussion
Topic: Portable Monitor for raspberry pi?
Replies: 29
Views: 1052

Re: Portable Monitor for raspberry pi?

Waveshare have HDMI input LCDs from about 4" to 13"
Some enclosed and with USB touch.
by Gavinmc42
Sun Oct 06, 2019 12:22 pm
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 288
Views: 71815

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

Got the lite x11 openbox version sort of working, no CornflowerBlue background. I emerge mc -Midnight Commander first, easier then to moved around the file system and edit files. But the link has some Wayland instructions with Gnome3. How much of it is close enough to Gentoo64 to get Wayland working...
by Gavinmc42
Sun Oct 06, 2019 7:03 am
Forum: Off topic discussion
Topic: Best Raspberry Pi Alternatives 2019
Replies: 62
Views: 4876

Re: Best Raspberry Pi Alternatives 2019

A PC is an alternative to a Pi? While Dad messes with toy computers, son grabs his old Windows PC and is now scripting RoBlox games. When the PC is on, a tablet is on a YT channel. Tablets are an alternative? When we can code for tablets easily on a Pi then they are complimentary like Microbits. Mic...

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