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by scruss
Tue Jul 17, 2018 12:14 am
Forum: Gaming
Topic: Retropie only utilising one CPU core
Replies: 1
Views: 33

Re: Retropie only utilising one CPU core

You can't, unfortunately. I don't know of any emulators that distribute tasks over cores. It would be really difficult to split an emulation of a realtime gaming system across multiple cores and keep everything in sync
by scruss
Mon Jul 16, 2018 1:24 pm
Forum: Python
Topic: RTC management with Raspberry PI 3
Replies: 6
Views: 109

Re: RTC management with Raspberry PI 3

As DirkS said: pyb is a MicroPython thing. It's different from the Python that typically runs on a Raspberry Pi.
by scruss
Sat Jul 14, 2018 1:05 pm
Forum: Beginners
Topic: Simple questions Xcode
Replies: 2
Views: 87

Re: Simple questions Xcode

You can develop Swift on the Raspberry Pi: Using Swift to control the Raspberry Pi GPIO pins and turn an LED on
(caution: old tutorial. May not work, uses sudo unnecessarily)
… but I don't know if it has remote GPIO support.
by scruss
Sat Jul 14, 2018 12:54 pm
Forum: Troubleshooting
Topic: Ssh with GUI
Replies: 2
Views: 145

Re: Ssh with GUI

What's the difference in the output from

Code: Select all

echo $DISPLAY
on both macs? This would be from the Terminal once you'd issued the ssh command.

There may also be some sharing settings in your mac preferences or in XQuartz.
by scruss
Fri Jul 13, 2018 12:25 am
Forum: Beginners
Topic: Reading Serial data and saving it to a file
Replies: 2
Views: 111

Re: Reading Serial data and saving it to a file

better yet, grabserial.
by scruss
Wed Jul 11, 2018 9:45 am
Forum: Networking and servers
Topic: Trouble with CUPS print server and SAMSUNG ML-2165 printer
Replies: 2
Views: 1102

Re: Trouble with CUPS print server and SAMSUNG ML-2165 printer

Given that there are several threads here with people having no luck with an ML-2165, I'm suspecting that it's Samsung's proprietary printing protocols that are the problem
by scruss
Wed Jul 11, 2018 9:41 am
Forum: Beginners
Topic: When elixir will release 1.5 for raspberry pi
Replies: 2
Views: 71

Re: When elixir will release 1.5 for raspberry pi

Elixir on Raspbian Stretch is 1.3.3. The version in testing is 1.6.5, which we might get next year.
by scruss
Sun Jul 08, 2018 12:54 pm
Forum: Troubleshooting
Topic: Trying to set up a Canon LBP 6030w over Wifi or USB
Replies: 7
Views: 2271

Re: Trying to set up a Canon LBP 6030w over Wifi or USB

No. Unless you're willing to try building the driver linked above from source, I don't know what to suggest.

Canon do not support printing on Raspberry Pi.
by scruss
Fri Jul 06, 2018 10:21 pm
Forum: Automation, sensing and robotics
Topic: Reed Switch Anemometor
Replies: 23
Views: 3267

Re: Reed Switch Anemometor

Looks like your anemometer puts out twice as many pulses per revolution. When you manually turn it, do you feel/hear four clicks instead of two? Reed switches are pretty quiet, so you may need to use a continuity meter to detect closure. Notes on your rig: maybe put the wind vane behind the anemomet...
by scruss
Fri Jul 06, 2018 1:00 pm
Forum: Beginners
Topic: Rename files using F2 keyboard shortcut
Replies: 11
Views: 258

Re: Rename files using F2 keyboard shortcut

DirkS wrote:
Thu Jul 05, 2018 10:31 pm
Now you have a halfway decent file manager again ;)
Indeed you will … until the next time a Foundation update smashes your accessible user configs into ~/oldconffiles, that is.
by scruss
Fri Jul 06, 2018 12:57 pm
Forum: Raspbian
Topic: GUI changes not being saved
Replies: 17
Views: 1490

Re: GUI changes not being saved

If you do need to avoid updates changing your configuration, it is straightforward to write a service which runs at launch, checks to see if the file in oldconffiles differs from the original, and copies it back if so. That would be nice. Can the Foundation write this as an option, please? I'm not ...
by scruss
Thu Jul 05, 2018 10:30 pm
Forum: Beginners
Topic: Rename files using F2 keyboard shortcut
Replies: 11
Views: 258

Re: Rename files using F2 keyboard shortcut

DirkS wrote:
Thu Jul 05, 2018 6:09 pm
In which program? The Raspbian file manager (pcmanfm) uses F2 to rename (you should get a popup dialog when pressing 2)
I thought it did too. I just tried it. It doesn't.
by scruss
Sun Jul 01, 2018 10:44 pm
Forum: Networking and servers
Topic: howto mount my synology nas to pi 3b+ ?
Replies: 11
Views: 297

Re: howto mount my synology nas to pi 3b+ ?

yes, you can replace the first bit with the IP address.

I substituted underscores for spaces in the /mnt/Lite_av_varje folder - did you type them?
by scruss
Sun Jul 01, 2018 8:44 pm
Forum: Networking and servers
Topic: howto mount my synology nas to pi 3b+ ?
Replies: 11
Views: 297

Re: howto mount my synology nas to pi 3b+ ?

I added a bit about opening a terminal above. change: sudo mkdir -m777 /mnt/incremental to sudo mkdir -m777 /mnt/Lite_av_varje sudo mkdir -m777 /mnt/Blandat and diskstation:/volume1/incremental /mnt/incremental nfs defaults,_netdev,nfsvers=3 0 0 to Nas3:/volume1/Lite\040av\040varje /mnt/Lite_av_varj...
by scruss
Sun Jul 01, 2018 5:18 pm
Forum: Beginners
Topic: SIMH: how can I get simh 3.9 / 4.0 ?
Replies: 2
Views: 71

Re: SIMH: how can I get simh 3.9 / 4.0 ?

I haven't built simh 4, but previous builds were easy and quick even on a Zero.

The project doesn't give Debian dependencies, but something like this might work:

Code: Select all

sudo apt install libpcap-dev vde2 libsdl2-dev libsdl2-ttf-dev
by scruss
Sun Jul 01, 2018 2:46 pm
Forum: Networking and servers
Topic: howto mount my synology nas to pi 3b+ ?
Replies: 11
Views: 297

Re: howto mount my synology nas to pi 3b+ ?

Glad you've got the NAS set for nfs. I've got an incremental backup share on my Synology called incremental . If you substitute the name of your share(s), this should probably work. I'm using sudo here because we need system privileges here. For almost everything else, you don't need sudo. Open a te...
by scruss
Sat Jun 30, 2018 1:55 pm
Forum: Raspbian
Topic: Raspbian bloated
Replies: 32
Views: 1004

Re: Raspbian bloated

evince uses the new GNOME GUI style, which is inconsistent with everything else on the platform. qpdf uses Qt, which needed a whole lot of extra stuff installed. It is a whole lot prettier than xpdf, even if I do still have a tiny soft spot for Motif and CDE. Which at the time (≥ 20 years ago) was ...
by scruss
Fri Jun 29, 2018 2:51 am
Forum: General discussion
Topic: PiTubeDirect - Raspberry Pi as Second Processor for BBC B
Replies: 1
Views: 107

PiTubeDirect - Raspberry Pi as Second Processor for BBC B

I hadn't seen this posted here before, but PiTubeDirect repurposes a Raspberry Pi as an Acorn second processor for the BBC B, Acorn Electron and BBC Master. Needless to say, it's ridiculously fast.
by scruss
Fri Jun 29, 2018 1:20 am
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 112
Views: 3824

Re: Pi Is Too Complicated

I even have one of these in a box somewhere... curta-mechanical-calculator.jpg A Maths Grenade! … the envy, I has it. I was just closing in on buying one of those at a bearable price on eBay, then William Gibson's Pattern Recognition came out with the Curta as a central plot element, and the things...
by scruss
Fri Jun 29, 2018 1:04 am
Forum: Other programming languages
Topic: Accessing GPIO I/O Pins from Forth, and How to Use Them
Replies: 35
Views: 4169

Re: Accessing GPIO I/O Pins from Forth, and How to Use Them

Z80 Refugee wrote:
Sun Mar 11, 2018 3:14 pm
This article is for people familiar with the Forth programming language but unfamiliar with using a Raspberry Pi,
I shared it with the FORTH PROGRAMMING LANGUAGE 21st CENTURY group on Facebook, and they rather liked it — so thanks! Someone even got it running on an OrangePi …
by scruss
Thu Jun 28, 2018 1:36 am
Forum: General programming discussion
Topic: TUTORIAL: The True Nature of a Linux File – And its Timestamps
Replies: 18
Views: 678

Re: TUTORIAL: The True Nature of a Linux File – And its Timestamps

And, well, storing such meta-data in the file format itself is a really bad idea. What if you don't want the recipient of your document to know what was in the old versions? This "feature" has gotten people into hot water many times. But most times, you do want that preserved. The same would happen...
by scruss
Thu Jun 28, 2018 1:20 am
Forum: Troubleshooting
Topic: Missing desktop icons!
Replies: 6
Views: 154

Re: Missing desktop icons!

WillBoxOwO wrote:
Wed Jun 27, 2018 10:45 pm
The problems started occuring when I wanted to clear some space: I used;
Uh oh, you broke it. That's what happens when you randomly delete stuff using sudo.

Reinstallation from a clean/wiped SD card is the only simple way forward here.
by scruss
Wed Jun 27, 2018 3:14 pm
Forum: Graphics, sound and multimedia
Topic: Is Openscad ported to Raspbian Stretch?
Replies: 14
Views: 2497

Re: Is Openscad ported to Raspbian Stretch?

If you're just wanting to teach/learn some CSG, then OpenSCAD.net works quite well under Chromium: 2018-06-27-110502_886x632_scrotA.png Joel — if you'll be at the Seattle Maker Faire, please say hi to my colleagues at the Makers Making Change table. I won't be there myself, but we do a lot of 3D mod...
by scruss
Wed Jun 27, 2018 2:57 pm
Forum: General programming discussion
Topic: TUTORIAL: The True Nature of a Linux File – And its Timestamps
Replies: 18
Views: 678

Re: TUTORIAL: The True Nature of a Linux File – And its Timestamps

Thanks for the explanation, RPi_Mike. I can see where you're coming from. Most computer scientists would agree that in an ideal world, a filesystem should be the SERVANT OF DATA , not the other way around. In other words, it should be as unobtrusive as possible and fully "respect the data" – both th...
by scruss
Sun Jun 24, 2018 8:07 pm
Forum: Graphics, sound and multimedia
Topic: Rotating a photo only slightly
Replies: 11
Views: 370

Re: Rotating a photo only slightly

Nice! I've never found a direct use for ssocr yet, so I'm glad it's proving useful. As someone old enough to remember paying someone in the field to phone a reading to us from a remote meter, this is a huge improvement. While I'm sure the guy we used to use to call in the numbers appreciated the bee...

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