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by jamesh
Sat Aug 08, 2020 1:42 pm
Forum: Ubuntu
Topic: Camera with Ubuntu 20.04 LTS?
Replies: 2
Views: 104

Re: Camera with Ubuntu 20.04 LTS?

Does raspistill work? Is it even installed?

There's a reason we provide our own OS. It's so we can test it and make sure it works with everything we sell. When you use "someone else's OS" you don't get that.
by jamesh
Sat Aug 08, 2020 9:29 am
Forum: Off topic discussion
Topic: Three Mobile UK 4G blocking this forum
Replies: 14
Views: 699

Re: Three Mobile UK 4G blocking this forum

Apologies, just frustrated, as I thought this issue was resolved last time it happened, and clearly it is not resolved, I will not be the only person affected. Many posters would just give up. If the problem went away the last time, then it was clearly resolved. That time. The issue should never co...
by jamesh
Sat Aug 08, 2020 9:25 am
Forum: Off topic discussion
Topic: Three Mobile UK 4G blocking this forum
Replies: 14
Views: 699

Re: Three Mobile UK 4G blocking this forum

You can keep posting about it, keep flagging it up, but that doesn't change the fact its the weekend, and the guy that needs to look into it isn't back from holiday until Monday. Apologies, just frustrated, as I thought this issue was resolved last time it happened, and clearly it is not resolved, ...
by jamesh
Sat Aug 08, 2020 9:21 am
Forum: Off topic discussion
Topic: Possible sale of ARM
Replies: 30
Views: 1083

Re: Possible sale of ARM

But consider that Nvidia is in direct competition with the Raspberry Pi. With devices like the Jetson Nano and whatever they are cooking up next. When Nvidia owns ARM they may look to tuning some screws to stifle Broadcom and Raspi developments. We would all be expected to switch to Nvidia Pi ! But...
by jamesh
Sat Aug 08, 2020 7:18 am
Forum: Off topic discussion
Topic: Three Mobile UK 4G blocking this forum
Replies: 14
Views: 699

Re: Three Mobile UK 4G blocking this forum

You can keep posting about it, keep flagging it up, but that doesn't change the fact its the weekend, and the guy that needs to look into it isn't back from holiday until Monday.
by jamesh
Sat Aug 08, 2020 7:11 am
Forum: Beginners
Topic: Pi4 SoC compared to other SoC?
Replies: 12
Views: 447

Re: Pi4 SoC compared to other SoC?

The VideoCore based SoCs are used in Broadcom's Set Top Box Divisions Products, though the Raspberry Pi Tradings ARMv7 / ARMv8 SoCs variants are only used in the Raspberry Pi SBC's. There is an undisclosed other customer that uses the BCM2711 as well. No clue who that is. when i searched that soc i...
by jamesh
Fri Aug 07, 2020 12:13 pm
Forum: Off topic discussion
Topic: Three Mobile UK 4G blocking this forum
Replies: 14
Views: 699

Re: Three Mobile UK 4G blocking this forum

We are looking in to it.
by jamesh
Fri Aug 07, 2020 11:17 am
Forum: Advanced users
Topic: Full dynamic overclocking, changing frequency and/or overvoltage without reboot ithout reboot?
Replies: 2
Views: 139

Re: Full dynamic overclocking, changing frequency and/or overvoltage without reboot ithout reboot?

Basically, even when overclocked, the system will only ramp the frequency up and down when required, up to the max and mins specified. So what you are wanting is already happening.
by jamesh
Fri Aug 07, 2020 8:16 am
Forum: Troubleshooting
Topic: cant run system on raspberry pi 2011.12 model b
Replies: 1
Views: 76

Re: cant run system on raspberry pi 2011.12 model b

Not enough information, what are you trying to do and what are the failure symptoms?
by jamesh
Fri Aug 07, 2020 7:18 am
Forum: Camera board
Topic: HQ Camera stock replenishment
Replies: 9
Views: 354

Re: HQ Camera stock replenishment

Afaik there are no plans to change the filter.
by jamesh
Fri Aug 07, 2020 7:12 am
Forum: Beginners
Topic: Pi4 SoC compared to other SoC?
Replies: 12
Views: 447

Re: Pi4 SoC compared to other SoC?

Make a spreadsheet. List all the features of the bcm2711, and alongside, other socs. Don't forget things like support, as well as Hw.
by jamesh
Thu Aug 06, 2020 2:32 pm
Forum: Automation, sensing and robotics
Topic: Do I Really Have To Perform Onboard Sensor-Fusion With An RPI?
Replies: 7
Views: 242

Re: Do I Really Have To Perform Onboard Sensor-Fusion With An RPI?

I'm not quite sure what your question is. That board connects via I2C (like most other Gyro board, e.g. MPU6050). Its easy enough to get the raw data off them via that route. So what is the problem with getting raw data? Do you not know how to convert those raw numbers in to something more human rea...
by jamesh
Wed Aug 05, 2020 2:02 pm
Forum: Beginners
Topic: (x)screensaver (or other way) to display clock & date when not in use?
Replies: 6
Views: 348

Re: (x)screensaver: clock & date?

Hi guys, thanks for your replies! This is already in the direction of what I wanted. I would like to have the time in a much bigger font, date is OK, but apparently you cannot change the size at all. Are there other options to achieve this? The system should be placed on a strategic spot in the hou...
by jamesh
Wed Aug 05, 2020 9:01 am
Forum: Camera board
Topic: HQ Camera stock replenishment
Replies: 9
Views: 354

Re: HQ Camera stock replenishment

Due to the usual, we had a small issue on the lead time of the IR filter used in the HQ camera which is now resolved. Combined with other Covid stuff, this has led to a small production delay but we are now back to full capacity, so we expect all current orders (from resellers) will be cleared in th...
by jamesh
Tue Aug 04, 2020 6:55 pm
Forum: Advanced users
Topic: Possible to replace RPi4 54MHz crystal with different frequency?
Replies: 12
Views: 576

Re: Possible to replace RPi4 54MHz crystal with different frequency?

I tend to start thinking the clocks in RPi4 are so tightly configured for the hardware that changing them in a controlled manner for specific purposes is impossible. Almost certainly the case. Clocks are a juggling nightmare in the firmware. A couple of years ago I was trying to get a DSI->HDMI bri...
by jamesh
Tue Aug 04, 2020 6:52 pm
Forum: Camera board
Topic: Raspberry HQ camera hasn't been implemented well?
Replies: 19
Views: 899

Re: Raspberry HQ camera hasn't been implemented well?

Please remember that we did not write Picamera, so it may do things differently to the demo applications we have written (raspistill etc) But it sounds like 6by9 has hit the nail on the head- you need to check the EXIF for the values you are looking for - we cannot guarantee that Picamera will repor...
by jamesh
Tue Aug 04, 2020 6:48 pm
Forum: General discussion
Topic: RPi4 BCM2711 and ARMv8 Crypto Extensions?
Replies: 61
Views: 7010

Re: RPi4 BCM2711 and ARMv8 Crypto Extensions?

There's an interesting Github PR https://github.com/raspberrypi/linux/pull/3772#issuecomment-668682343 that asks to enabled some particular NEON extensions to accelerate SHA256. But the poster has not given any figures. If people fancy testing it to see if they can find anywhere that things improve ...
by jamesh
Tue Aug 04, 2020 4:40 pm
Forum: Advanced users
Topic: Influence of Core Frequency
Replies: 6
Views: 285

Re: Influence of Core Frequency

So to me that sounds like the core_freq (core frequency) is the frequency of the VPU core clock. And I would really like to know what impact the throttling has on the overall performance of the PI. i think its less that it throttles the core clock, and more that it just locks it to the fastest spee...
by jamesh
Tue Aug 04, 2020 3:10 pm
Forum: Advanced users
Topic: Influence of Core Frequency
Replies: 6
Views: 285

Re: Influence of Core Frequency

robinho710 wrote:
Tue Aug 04, 2020 9:12 am
And I would really like to know what impact the throttling has on the overall performance of the PI.
In everyday usage, not particularly noticeable.
by jamesh
Tue Aug 04, 2020 3:01 pm
Forum: OpenMAX
Topic: Whether OpenMAX is deprecated? What is the uptodate multimedia platform on RPi?
Replies: 5
Views: 171

Re: Whether OpenMAX is deprecated? What is the uptodate multimedia platform on RPi?

italiansc wrote:
Tue Aug 04, 2020 2:55 pm
So if the OpenMAX API is removed from kernel,which API should I use to operator audio device? Currently I only know use OMX Component to play audio.
You should use the standard linux ALSA components, which is how the desktop does things.

edit: Ninja'd
by jamesh
Tue Aug 04, 2020 7:27 am
Forum: Advanced users
Topic: Possible to replace RPi4 54MHz crystal with different frequency?
Replies: 12
Views: 576

Re: Possible to replace RPi4 54MHz crystal with different frequency?

In order to get the right composite clock on the pi4, we need to run some clocks more slowly. So it's disabled by default so the performance hit isn't experienced by everyone.
by jamesh
Tue Aug 04, 2020 7:25 am
Forum: General discussion
Topic: Useful Accessory?
Replies: 15
Views: 648

Re: Useful Accessory?

More to the point might be to find out what the Pis on the ISS are coated with. NASA has very conservative approach for ISS and there is a list of approved materials, not sure if it’s public. Materials must undergo lot of tests and engineers are likely to pick commercially available and approved co...
by jamesh
Mon Aug 03, 2020 4:55 pm
Forum: Beginners
Topic: Video driver options recap and clarification (thanks!)
Replies: 4
Views: 164

Re: Video driver options recap and clarification (thanks!)

Thank you for the extremely useful link that actually answers all my questions. Now I wonder if the development of the FULL KMS video driver for RPi 4 is still ongoing despite Vulkan, and if there are estimates of the release date. Thank you # Yes, still under development. Vulkan is being done off ...
by jamesh
Mon Aug 03, 2020 7:55 am
Forum: Troubleshooting
Topic: Custom MIPI DSI panel - dsi works but the display is always black
Replies: 26
Views: 788

Re: Custom MIPI DSI panel - dsi works but the display is always black

We did have an internal discussion. One point that came up, its appears your scope/probes are not fast enough. What sort of kit are you using? General consensus is that the timings are wrong somewhere, perhaps the low to high speed change. "Maybe trying to drive HS before the other end has stopped d...
by jamesh
Mon Aug 03, 2020 6:33 am
Forum: Camera board
Topic: Normal cable?
Replies: 17
Views: 622

Re: Normal cable?

bullen wrote:
Sun Aug 02, 2020 9:58 pm
Any plans on making a cable that is round for the camera?
No plans from us I am afraid.

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