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by jamesh
Tue Nov 13, 2018 9:43 pm
Forum: Troubleshooting
Topic: RPi3 b+ crashes each morning at 0530
Replies: 9
Views: 154

Re: RPi3 b+ crashes each morning at 0530

Oh, and when you looked and the log and were thinking wifi issue, what was clue or content of the log info that made you think wifi? Probably because the entries are about mmc1 and sdio, AFAIK the wifi chip is connected to the mmc1 port using the sdio interface. Also a reference to brcmfmac, which ...
by jamesh
Tue Nov 13, 2018 9:42 pm
Forum: Troubleshooting
Topic: RPI camera don't work with zBar
Replies: 6
Views: 211

Re: RPI camera don't work with zBar

raspistill capture time can be reduced to just under 1s. Should be good enough to do a detection in 2 seconds.
by jamesh
Tue Nov 13, 2018 4:36 pm
Forum: Media centres
Topic: Help with powering RPI 3b+ and 7" touch screen
Replies: 4
Views: 171

Re: Help with powering RPI 3b+ and 7" touch screen

I have several similar setups (basically CarPc and dashboards), sorry to say you can't get away with 1amp. a Pi3 uses around 400mA @idle, 800mA on full load, then add Wi-Fi and BT, which draw 100mA and 240mA each when searching; You need at least 5.[email protected] only to power the Pi3 ad any peripheral your...
by jamesh
Tue Nov 13, 2018 4:34 pm
Forum: Troubleshooting
Topic: RPi3 b+ crashes each morning at 0530
Replies: 9
Views: 154

Re: RPi3 b+ crashes each morning at 0530

I did these updates this morning after the last 0530 crash. So I guess I should wait and see what happens tomorrow morning at this point? Could something be causing wifi issues at that time here at my home network? Maybe sonos alarms? There are three of them here, but they do not come on until 6:15...
by jamesh
Tue Nov 13, 2018 4:33 pm
Forum: Camera board
Topic: Pi Zero Camera v1.3 dropped frames
Replies: 8
Views: 130

Re: Pi Zero Camera v1.3 dropped frames

Try dropping the bitrate, that can make quite difference on slower cards.
by jamesh
Tue Nov 13, 2018 4:26 pm
Forum: Troubleshooting
Topic: RPi3 b+ crashes each morning at 0530
Replies: 9
Views: 154

Re: RPi3 b+ crashes each morning at 0530

That's the absolute very latest 4.14 kernel so you must have done an rpi-update recently. Did you just do it? Or is this the version that is showing the problem?
by jamesh
Tue Nov 13, 2018 4:01 pm
Forum: Troubleshooting
Topic: RPi3 b+ crashes each morning at 0530
Replies: 9
Views: 154

Re: RPi3 b+ crashes each morning at 0530

Wifi has died, badly. Don't think I have seen that one before. What version of the OS are you using? There have been networking fixes in recent versions. edit: Just noticed the block for 120s. I wonder if this is a CMA compaction problem. There is a fix in our latest kernel but its not been official...
by jamesh
Tue Nov 13, 2018 3:56 pm
Forum: Troubleshooting
Topic: RPI camera don't work with zBar
Replies: 6
Views: 211

Re: RPI camera don't work with zBar

I've used raspistill in combination with zbar in a bash script.

Worked fine IIRC.
by jamesh
Tue Nov 13, 2018 3:54 pm
Forum: Python
Topic: Alternative to zbar
Replies: 1
Views: 55

Re: Alternative to zbar

Plese keep to one thread.

And start projects earlier, they always take longer than expected.
by jamesh
Tue Nov 13, 2018 3:25 pm
Forum: Troubleshooting
Topic: RPi3 b+ randomly won't boot GUI
Replies: 3
Views: 50

Re: RPi3 b+ randomly won't boot GUI

Going to need a bit more to go on, not a lot of detail in your report. So, when you reboot, sometimes the desktop does not appear? What appears instead? Are there any error messages? Does the desktop start but not work correctly? Might be worth filling in this report template we use on github. **Des...
by jamesh
Tue Nov 13, 2018 2:04 pm
Forum: General discussion
Topic: How to run LibreOffice 6.1 on the Raspberry Pi 3
Replies: 3
Views: 235

Re: How to run LibreOffice 6.1 on the Raspberry Pi 3

Whilst I am mostly sure that the OP has no neferious aims behind this, it is very true that you should be mindbogglingly careful of installing random and uncheckable binary files from random places on the internet, then installing them on to a machine in your local network. Since there is very littl...
by jamesh
Tue Nov 13, 2018 11:36 am
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 311
Views: 14272

Re: Multiple Frame buffer beta testers wanted

If you have a correctly set up DPI device then even with the standard firmware, you will get a framebuffer accessing that device. If you want HDMI AS WELL, then you can use this custom firmware and you will get two framebuffers. Still not sure why the Zero firmware isn't working though. Yep my plan...
by jamesh
Tue Nov 13, 2018 10:25 am
Forum: For sale
Topic: Terrible service from an official Pi reseller. The Pi Shop [FIXED]
Replies: 5
Views: 1040

Re: Terrible service from an official Pi reseller. The Pi Shop

OK, so it appears that these guys are official resellers (Sorry, The Pi Shop, I don't have a list!), and that this issue has been sorted out to the OP's satisfaction.
by jamesh
Tue Nov 13, 2018 10:18 am
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 311
Views: 14272

Re: Multiple Frame buffer beta testers wanted

Just out of interest, why would you be trying multiple frame buffer code on a Zero? Are you using a DPI display? We are preparing two student projects using a Texas Instruments DMD and a Rpi Zero. One idea is to use the setup to build a structured light 3d scanner the other would be a near uv expos...
by jamesh
Tue Nov 13, 2018 9:51 am
Forum: Advanced users
Topic: Manufacture a custom Rasp at large scale
Replies: 4
Views: 111

Re: Manufacture a custom Rasp at large scale

Farnell have a custom Pi building service.

https://www.element14.com/community/doc ... on-service
by jamesh
Tue Nov 13, 2018 9:49 am
Forum: Advanced users
Topic: Autocomplete with TAB button is not working anymore
Replies: 1
Views: 43

Re: Autocomplete with TAB button is not working anymore

This can happen if the SD card storage is full. What does df report?
by jamesh
Tue Nov 13, 2018 9:46 am
Forum: Camera board
Topic: Pi Zero Camera v1.3 dropped frames
Replies: 8
Views: 130

Re: Pi Zero Camera v1.3 dropped frames

This sounds like a SD card writing speed limitation. The camera/Zero should be capable of those sorts of speeds. What bitrate are you using for the video? You could try dropping it to reduce the amount of data written to the card.
by jamesh
Tue Nov 13, 2018 9:44 am
Forum: General discussion
Topic: Programming Software for Raspberry PI
Replies: 11
Views: 273

Re: Programming Software for Raspberry PI

One of the nice things about Linux in all its variants is the wealth of Free and Open Source Software that one can get from the distribution (Raspbian/Debian in this case) repositories. C/C++ is so central to Linux (Linux is built in C++) that almost all but the most minimal distributions come with...
by jamesh
Tue Nov 13, 2018 9:42 am
Forum: General programming discussion
Topic: What OS and language to use for database project??
Replies: 2
Views: 75

Re: What to use??

Raspbian. .The asnwer is always Raspbian.

Python would work, C would work, C++ would work.

Use the one you know.
by jamesh
Tue Nov 13, 2018 9:41 am
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 311
Views: 14272

Re: Multiple Frame buffer beta testers wanted

Hmm. I pressume you are using the kernel.img linked above? Using a standard start.elf, this should still boot. When you then replace the start.elg with the multi frame buffer one, that is when it goes wrong? Yep exactly works fine if i use the original start_x.elf or specify start_x=0 in the config...
by jamesh
Tue Nov 13, 2018 9:24 am
Forum: Camera board
Topic: camera V2 (IMX219) shutter speed
Replies: 2
Views: 49

Re: camera V2 (IMX219) shutter speed

1. Shutter speed is variable.
2. Depends entirley on what quality you want. Its an 8MP camera.
by jamesh
Mon Nov 12, 2018 4:37 pm
Forum: Graphics programming
Topic: Divide By Depth??
Replies: 35
Views: 591

Re: Divide By Depth??

That is for the RPi, not so much for other systems. No, it is true for all modern ARM CPU's. True for all systems. It is part of the ARMv8 architecture. NEON is guaranteed present no matter who manufactures the SoC! See the ARMv8 ARM (if you can found your way around it!) I see ARMv8 does half prec...
by jamesh
Mon Nov 12, 2018 4:05 pm
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 311
Views: 14272

Re: Multiple Frame buffer beta testers wanted

Hmm. I pressume you are using the kernel.img linked above? Using a standard start.elf, this should still boot. When you then replace the start.elg with the multi frame buffer one, that is when it goes wrong? Yep exactly works fine if i use the original start_x.elf or specify start_x=0 in the config...
by jamesh
Mon Nov 12, 2018 4:04 pm
Forum: Graphics programming
Topic: Divide By Depth??
Replies: 35
Views: 591

Re: Divide By Depth??

Are there any current SoC scale ARM devices without FPU's? Not talking M0 type of stuff, but cores that go on SBC's.
by jamesh
Mon Nov 12, 2018 3:25 pm
Forum: Python
Topic: picamera record 1080p 30fps
Replies: 1
Views: 43

Re: picamera record 1080p 30fps

There is no frame rate information in a H264 stream. You woudl need to wrap in a container (e.g. mp4) and specify the frame rate in that, then play it back to check it's the right speed.

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