Go to advanced search

by plugwash
Fri Apr 20, 2018 12:39 am
Forum: Raspbian
Topic: SWI Kernel Calls broke?
Replies: 8
Views: 830

Re: SWI Kernel Calls broke?

Historically on arm operating systems, the parameter of the SWI instruction was used to select the system call. This was however problematic in a couple of ways. 1. The kernel had to fish the SWI number out of the instruction stream. This was not friendly to core designs with seperate instruction an...
by plugwash
Thu Apr 19, 2018 10:23 pm
Forum: Other languages
Topic: How do I compile a Visual Basic program for the Pi?
Replies: 7
Views: 218

Re: How do I compile a Visual Basic program for the Pi?

First of all, I'm not sure "Other Languages" is the right sub-forum for this. I think "Other Languages" is for other human languages, not programming languages. Confusingly this forum has two sub-forums called "Other Languages". My understanding is that "community->other languages" is for human lan...
by plugwash
Fri Apr 13, 2018 4:50 am
Forum: General discussion
Topic: Using 74HC595 shift registers
Replies: 14
Views: 2224

Re: Using 74HC595 shift registers

Some further research (I know this is an old thread but it comes up in google searches), it seems while the 74HCT595 is now virtually impossible to find in DIL the 74AHCT595 is available in DIL from most of the usual suspects and seems to tick all the right boxes (though it's faster, so it may be mo...
by plugwash
Sat Mar 24, 2018 10:49 am
Forum: General discussion
Topic: Help:Why my Raspberry Pi‘s 5v power port output 7.5-8V?
Replies: 16
Views: 600

Re: Help:Why my Raspberry Pi‘s 5v power port output 7.5-8V?

That other thread you link is getting a high reading on the 3.3V but a normal reading on the 5V. Here all the readings are high in about the same ratio which suggests a meter whose voltage reference is too low either because the meter is faulty or because the battery is low.
by plugwash
Sat Mar 24, 2018 10:45 am
Forum: Compute Module
Topic: Faster LAN via RasPi 3B+ LAN chip?
Replies: 11
Views: 811

Re: Faster LAN via RasPi 3B+ LAN chip?

I contacted them on twitter asking why the chip was missing from their website and got told to contact a sales office if I wanted more information on the chip. I wasn't sufficiently interested to follow up further. https://twitter.com/plugwash/status/973941756940218369 Part of me wonders if the chip...
by plugwash
Sat Mar 24, 2018 10:34 am
Forum: General discussion
Topic: Help:Why my Raspberry Pi‘s 5v power port output 7.5-8V?
Replies: 16
Views: 600

Re: Help:Why my Raspberry Pi‘s 5v power port output 7.5-8V?

if the Pi is otherwise working it is highly unlikely that those voltage readings are real.

i strongly suspect there is something wrong with your multimeter, perhaps a low battery.
by plugwash
Thu Mar 22, 2018 4:12 am
Forum: Compute Module
Topic: Faster LAN via RasPi 3B+ LAN chip?
Replies: 11
Views: 811

Re: Faster LAN via RasPi 3B+ LAN chip?

Though for some reason microchip seem to be hiding the details of the 7515 from their website, I dunno how hard it is to extract said details from a micochip sales office. :(
by plugwash
Thu Feb 22, 2018 4:33 pm
Forum: General discussion
Topic: Openvpn trouble
Replies: 9
Views: 588

Re: Openvpn trouble

It looks like easy-rsa is now in it's own package and installs to /usr/share/easy-rsa rather than /usr/share/doc/openvpn/examples/easy-rsa/2.0
by plugwash
Tue Oct 10, 2017 10:52 am
Forum: C/C++
Topic: Problem with longjmp on Pi Zero W
Replies: 16
Views: 2180

Re: Problem with longjmp on Pi Zero W

The question I would ask is what else is your program doing? Are these longjmp calls happening in some kind of event handler where third party code calsl your code?
by plugwash
Mon Sep 11, 2017 2:50 am
Forum: Raspbian
Topic: [SOLVED] Can't install libapache2-mod-proxy-html on Stretch
Replies: 2
Views: 1057

Re: Can't install libapache2-mod-proxy-html on Stretch

It appears that libapache2-mod-proxy-html was a transitional package in jessie and removed in stretch.
by plugwash
Tue Aug 22, 2017 1:49 pm
Forum: Raspbian
Topic: Raspbian 6 "Squeeze" image
Replies: 6
Views: 816

Re: Raspbian 6 "Squeeze" image

There is no such thing as raspbian squeeze.
by plugwash
Wed Jun 28, 2017 10:00 am
Forum: Raspbian
Topic: Discrepancy in Raspbian's repository regarding MySQL
Replies: 4
Views: 959

Re: Discrepancy in Raspbian's repository regarding MySQL

I couldn't figure out why they autobuilders weren't seeing it, so I built it manually.
by plugwash
Wed Jun 28, 2017 12:28 am
Forum: Raspbian
Topic: Discrepancy in Raspbian's repository regarding MySQL
Replies: 4
Views: 959

Re: Discrepancy in Raspbian's repository regarding MySQL

Ok, i've removed the mysql-5.6 source package and associated binaries. Unfortunately the transitional packages don't seem to want to build and i'm not sure why.
by plugwash
Mon Jun 26, 2017 12:28 am
Forum: Raspbian
Topic: Discrepancy in Raspbian's repository regarding MySQL
Replies: 4
Views: 959

Re: Discrepancy in Raspbian's repository regarding MySQL

Looks like Debian broke the monotonicity of version numbers. I'll take a better look soon (this post is mostly a reminder to myself)
by plugwash
Sat Jun 10, 2017 1:33 pm
Forum: Linux Kernel
Topic: Has there been a major change in the firmware and/or dtbs?
Replies: 5
Views: 2006

Re: Has there been a major change in the firmware and/or dtb

Turns out a relatively small change to the dtbs will make both kernels boot. My patch script is at

https://github.com/raspbian-packages/ra ... /fixupdtbs
by plugwash
Sat Jun 10, 2017 10:13 am
Forum: General discussion
Topic: Does this 3 port ethernet hub work with Pi0W
Replies: 9
Views: 1007

Re: Does this 3 port ethernet hub work with Pi0W

I haven't tested that particular hub personally but I can see no reason why a hub would work on one and not the other.
by plugwash
Thu Jun 01, 2017 7:04 pm
Forum: Linux Kernel
Topic: Has there been a major change in the firmware and/or dtbs?
Replies: 5
Views: 2006

Re: Has there been a major change in the firmware and/or dtb

Further testing shows it is the dtbs that are the issue.
by plugwash
Thu Jun 01, 2017 6:09 pm
Forum: Linux Kernel
Topic: Has there been a major change in the firmware and/or dtbs?
Replies: 5
Views: 2006

Has there been a major change in the firmware and/or dtbs?

I'm trying to update the debian-style kernel/firmware packages in raspbian (where we ship kernel and firmware/dtbs seperately) but i'm finding that there seem to be major compatibility issues. Trying to boot a 4.4 kernel with the new firmware/dtbs hangs at the rainbow screen. Trying to boot a 4.9 ke...
by plugwash
Thu Jun 01, 2017 1:40 pm
Forum: Troubleshooting
Topic: Heat damage to audio jack?
Replies: 7
Views: 886

Re: Heat damage to audio jack?

Silver is quite commonly used as a plating material for connectors. Silver is a very good conductor and silver oxide is also a good conductor.

Unfortunately silver sulphide is not a good conductor. So silver not such a great choice for polluted environments.
by plugwash
Mon May 22, 2017 1:00 am
Forum: Troubleshooting
Topic: Repository missing "Contents" file
Replies: 5
Views: 726

Re: Repository missing "Contents" file

Should be fixed now.
by plugwash
Sun May 21, 2017 1:07 pm
Forum: Troubleshooting
Topic: Repository missing "Contents" file
Replies: 5
Views: 726

Re: Repository missing "Contents" file

It seems it is possible to end up with a deb where the "data tarball" has a .tar.gz extension but is actually uncompressed. dpkg is ok with this but reprepro gives an error when trying to read the file contents for said deb. An error when reading deb contents leads to no "Contents" file being genera...
by plugwash
Sun May 21, 2017 2:00 am
Forum: Troubleshooting
Topic: Repository missing "Contents" file
Replies: 5
Views: 726

Re: Repository missing "Contents" file

Thanks for the notice.

Due to a hardware failure we migrated the packages into a new reprepro instance. It seems that the new instance is not generating contents files. What i'm not sure of is why. I will try and figure out what the problem is.
by plugwash
Thu May 18, 2017 1:48 pm
Forum: General discussion
Topic: Why the Raspberry Pi 3 Model B does not use upstream Linux?
Replies: 19
Views: 2296

Re: Why the Raspberry Pi 3 Model B does not use upstream Lin

What happens with kernels for all too many arm boards is that a SoC vendor takes a copy of Linux and ports it to their SoC but they don't involve the upstream Linux developers in the porting process at all and they hack together support as quickly as possible. Frequently they also fail to keep their...
by plugwash
Fri May 05, 2017 1:49 pm
Forum: Raspbian
Topic: Support timeline for Jessie
Replies: 9
Views: 2567

Re: Support timeline for Jessie

We will keep sucking down and recompiling updates from Debian for as long as Debian keeps releasing them. However pi-specific components (including the kernel) for jessie are unlikely to see updates once the default moves on to stretch.

Go to advanced search