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by jamesh
Thu Jul 19, 2018 1:30 pm
Forum: General discussion
Topic: The problem with the operating system file!
Replies: 6
Views: 137

Re: The problem with the operating system file!

ShiftPlusOne wrote:
Thu Jul 19, 2018 11:50 am
B.Goode wrote:
Thu Jul 19, 2018 10:35 am
Isn't the SHA256 published at https://www.raspberrypi.org/downloads/raspbian/ based on the downloaded or torrented .zip?
Correct. The idea is to verify you downloaded what you think you downloaded, which is the .zip, not the .img.
Sorry! Got it the wrong way round!
by jamesh
Thu Jul 19, 2018 10:23 am
Forum: Troubleshooting
Topic: RS Raspberry PI 3B+ GPIO pins possibly defective
Replies: 2
Views: 58

Re: RS Raspberry PI 3B+ GPIO pins possibly defective

Is there any issue with the Raspberry Pi 3B+ from RS? I had 2 of them malfunction after less than a month of use while I borrowed my friend's 3 B and used it exactly the same way, with a very similar case and it works fine. Both the RS ones were ordered from Amazon. One was part of the CanaKit and ...
by jamesh
Thu Jul 19, 2018 10:19 am
Forum: Off topic discussion
Topic: 'You are permanently banned' error
Replies: 10
Views: 299

Re: 'You are permanently banned' error

OK, I think this may now be fixed. Some sort of proxy server vs phpbb issue somewhere.
by jamesh
Thu Jul 19, 2018 10:15 am
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 49
Views: 871

Re: What Does Hiding the Details of I/O in Library Calls Teach?

As for "nobody who knows how to make anything" clearly somebody does. From the Linux kernel, to the OS built on it, to the language compilers and other tools, to the web browser I'm talking to you through. A huge lot of stuff, that mostly works very well. Where did that all come from? Indeed, but y...
by jamesh
Thu Jul 19, 2018 10:02 am
Forum: General discussion
Topic: The problem with the operating system file!
Replies: 6
Views: 137

Re: The problem with the operating system file!

The hash is calculated after you unzip.
by jamesh
Thu Jul 19, 2018 9:41 am
Forum: Off topic discussion
Topic: 'You are permanently banned' error
Replies: 10
Views: 299

Re: 'You are permanently banned' error

OK, clearly something going awry somewhere - had quite a few emails this morning from members with the same issue.

Our webteam are investigating.
by jamesh
Thu Jul 19, 2018 9:40 am
Forum: Troubleshooting
Topic: Raspberry Pi 3B+ overheating during zero activity or low activity (PiAware & Dump1090-fa Installed)
Replies: 12
Views: 195

Re: Raspberry Pi 3B+ overheating during zero activity or low activity (PiAware & Dump1090-fa Installed)

I run Pi3B+ without a heatsink, no case, in an air conditioned office, so about 24c, it's running idle at 45.6c. Running a few simple programs, bumps up to 57c. The thermal inertia of the new Pi3B+ is now very good because the entire PCB ground-plane acts as a heat sink - which means that you shoul...
by jamesh
Thu Jul 19, 2018 9:21 am
Forum: Troubleshooting
Topic: Raspberry Pi 3B+ overheating during zero activity or low activity (PiAware & Dump1090-fa Installed)
Replies: 12
Views: 195

Re: Raspberry Pi 3B+ overheating during zero activity or low activity (PiAware & Dump1090-fa Installed)

Note that overheating is only above 85c. Your temperatures, although hot, are not actually overheating.

I run Pi3B+ without a heatsink, no case, in an air conditioned office, so about 24c, it's running idle at 45.6c. Running a few simple programs, bumps up to 57c.
by jamesh
Thu Jul 19, 2018 9:00 am
Forum: Troubleshooting
Topic: Wifi/Bluetooth dropping connection, how to reconnect?
Replies: 3
Views: 58

Re: Wifi/Bluetooth dropping connection, how to reconnect?

Nope, I have the full version. The GUI wasn't working great and I couldn't put a static IP so I prefered to use config files (there's a way to set IP and such things from the GUI but it seems it has no effect). Is Raspbian really stable and working for the Pi zero w? Also I had to install from the ...
by jamesh
Thu Jul 19, 2018 8:33 am
Forum: Beginners
Topic: How do I install AVbin
Replies: 4
Views: 95

Re: How do I install AVbin

Almost certainly that is an x86 binary so will not work on the Pi. Also, that project looks dead - no changes since 2012. things have moved on a bit since then. Why do you need it? I want to play an MP3, Ogg, or whatever file on my Raspberry PI, but in order to do that I need AVbin (im using python...
by jamesh
Thu Jul 19, 2018 8:31 am
Forum: Troubleshooting
Topic: RPi3 WiFi Issues
Replies: 3
Views: 72

Re: RPi3 WiFi Issues

As always, the first question is are you using the most recent version of Raspbian?
by jamesh
Thu Jul 19, 2018 8:28 am
Forum: Graphics, sound and multimedia
Topic: * SIMULTANEOUSLY RECORD 2 VIDEOS *
Replies: 5
Views: 86

Re: * SIMULTANEOUSLY RECORD 2 VIDEOS *

Bit confused. What do you mean by saving to a single file? How do you want to combine them? Are you wanting stereo video? Recording two streams is possible, but you will hits limits of the encoder at higher resolutions, i.e. you wont be able to encode 2 1080p30 streams at the same time, that simply ...
by jamesh
Thu Jul 19, 2018 8:24 am
Forum: Off topic discussion
Topic: 'You are permanently banned' error
Replies: 10
Views: 299

Re: 'You are permanently banned' error

Hmm, looking at your post history you have posted from quite a few different IP addresses. It's possible that one of those has been banned because of spamming, and occasionally when you log in you have that address, hence the message. When you next get it, can you note your IP address, and post it h...
by jamesh
Wed Jul 18, 2018 9:39 pm
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 49
Views: 871

Re: What Does Hiding the Details of I/O in Library Calls Teach?

The disconnect seems to be between what the RPF and partners are providing for and what you think they should be providing for, what their goals are and what you believe they should be. It's a lot like complaining driving instructors are not teaching car mechanics or vehicle engineering. That Astro...
by jamesh
Wed Jul 18, 2018 9:34 pm
Forum: Off topic discussion
Topic: 'You are permanently banned' error
Replies: 10
Views: 299

Re: How to contact board administrator?

Hmm, thats an odd one. It was a ban by IP adress, rather than username, wihch is also odd.

AFAIK, you have not been banned, and you can still post, so perhaps just a glitch in the matrix.
by jamesh
Wed Jul 18, 2018 4:29 pm
Forum: Troubleshooting
Topic: Can't boot RPi 3 model B. Old wine, new skins?
Replies: 2
Views: 83

Re: Can't boot RPi 3 model B. Old wine, new skins?

I think that the older SD cards have old firmware on them, which can exhibit as the low power indicator.

Cannot help with the Android build, but you could put the older SD card in the older device and update/upgrade it, that might be enough to get the requried firmware.
by jamesh
Wed Jul 18, 2018 4:26 pm
Forum: Bare metal, Assembly language
Topic: Understanding the mailbox property interface
Replies: 6
Views: 150

Re: Understanding the mailbox property interface

Turns out we already had a link to our own example source code on the first page, but I have also added a link to the example linked above, as that is pretty clear and simple.
by jamesh
Wed Jul 18, 2018 3:49 pm
Forum: Troubleshooting
Topic: Wifi/Bluetooth dropping connection, how to reconnect?
Replies: 3
Views: 58

Re: Wifi/Bluetooth dropping connection, how to reconnect?

I pressume from your post that you installed the Lite version of Raspbian? Might be worth trying the full version if that is the case. Should be easy to set up the wireless from that, just a few clicks etc. We are currently waiting on/testing new firmware for the Wireless chip, that may or may not h...
by jamesh
Wed Jul 18, 2018 3:44 pm
Forum: Bare metal, Assembly language
Topic: Understanding the mailbox property interface
Replies: 6
Views: 150

Re: Understanding the mailbox property interface

I've started writing a more comprehensive mailbox document, the work in [progress is here https://github.com/raspberrypi/documentation/tree/JamesH65-mailbox_docs/configuration/mailboxes Does that help? In your article can you include a simple sample C program that anyone can cut'n'paste and get run...
by jamesh
Wed Jul 18, 2018 12:56 pm
Forum: Troubleshooting
Topic: Wifi freeze
Replies: 10
Views: 192

Re: Wifi freeze

If you want a bug investigated, it needs to go in to our github so it can be tracked. Just putting in a forum post will mean it gets lost. Please check that there isn't a previous bug report for the same thing before adding a new issue. When creating a new issues, make sure there is enough infromati...
by jamesh
Wed Jul 18, 2018 11:24 am
Forum: Beginners
Topic: Black Screen - no command line prompt!
Replies: 5
Views: 1111

Re: Black Screen - no command line prompt!

Thanks so much everyone. This has given me a lot to read incase it happens again. In the end, I turned it off at the plug (unwise I know) and it was ok when I turned it back with luckily no SD card corruption. After that I used the update and upgrade options - it might have been that my software (o...
by jamesh
Wed Jul 18, 2018 11:23 am
Forum: Troubleshooting
Topic: Wifi freeze
Replies: 10
Views: 192

Re: Wifi freeze

Ernst wrote:
Wed Jul 18, 2018 11:19 am
Walmar wrote:
Wed Jul 18, 2018 9:38 am
Please is there any tips i can try?
What is your kernel version ? If it is 4.14.50 or later then I suggest you try 4.14.34
Why? I am not aware of any changes between 34 and 50 that might cause this issue. Although there might be, I'm just not aware of any!
by jamesh
Wed Jul 18, 2018 11:21 am
Forum: Troubleshooting
Topic: Wifi freeze
Replies: 10
Views: 192

Re: Wifi freeze

Nothing I can think of straight away. Sounds like there is an issue either in the wireless chip firmware or the linux driver. We are currently testing new firmware for the wireless, but its still not there yet. Might be worth checking out our github account, and seeing if there is an issue that alre...
by jamesh
Wed Jul 18, 2018 11:06 am
Forum: Beginners
Topic: How do I install AVbin
Replies: 4
Views: 95

Re: How do I install AVbin

Almost certainly that is an x86 binary so will not work on the Pi.

Also, that project looks dead - no changes since 2012. things have moved on a bit since then. Why do you need it?
by jamesh
Wed Jul 18, 2018 11:04 am
Forum: General programming discussion
Topic: What Does Hiding the Details of I/O in Library Calls Teach?
Replies: 49
Views: 871

Re: What Does Hiding the Details of I/O in Library Calls Teach?

We don't see it as a problem. The huge majority of people in the SW industry use libraries, it's a very small subset who actually write to registers. That said, I always think it is useful to have an understanding of the layers of software underneath libraries, if only for debugging purposes. But yo...

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