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by jamesh
Tue Oct 04, 2022 3:59 pm
Forum: SDK
Topic: Any good overviews of using a Pico as a USB device?
Replies: 7
Views: 194

Re: Any good overviews of using a Pico as a USB device?

are there any tutorials on using Tiny USB? I know that there are some example projects, but most seem to be a lot of code without any explanation of what's really going on. I haven't found any tutorials at all, only example projects and projects which use it. My experience has been that you are mos...
by jamesh
Tue Oct 04, 2022 3:58 pm
Forum: SDK
Topic: Any good overviews of using a Pico as a USB device?
Replies: 7
Views: 194

Re: Any good overviews of using a Pico as a USB device?

What sort of speeds do you need? Serial/UART can be pretty quick, not as fast as USB, but maybe easier to handle at the Linux end.
by jamesh
Tue Oct 04, 2022 1:40 pm
Forum: Troubleshooting
Topic: Raspberry Pi 400 Factory Reset / Make New
Replies: 9
Views: 206

Re: Raspberry Pi 400 Factory Reset / Make New

You don't need to do that, a reimage will clear the SD card anyway, but I suppose for ultra ultra security, a "shred" first might help. But a re-image will only overwrite the start of the SD card. Any data left at the end will still be there as a typical re-image doesn't write to the enti...
by jamesh
Tue Oct 04, 2022 12:57 pm
Forum: Troubleshooting
Topic: Raspberry Pi 400 Factory Reset / Make New
Replies: 9
Views: 206

Re: Raspberry Pi 400 Factory Reset / Make New

You don't need to do that, a reimage will clear the SD card anyway, but I suppose for ultra ultra security, a "shred" first might help.
by jamesh
Tue Oct 04, 2022 12:37 pm
Forum: Camera board
Topic: libcamera stack vs legacy stack performance and stability on a model 3
Replies: 1
Views: 146

Re: libcamera stack vs legacy stack performance and stability on a model 3

Moving to libcamera is the recommended option. As you say, the older stack isn't getting any more fixes/features, whilst libcamera is undergoing constant development. Performance is roughly the same for both.
by jamesh
Tue Oct 04, 2022 12:35 pm
Forum: MicroPython
Topic: jmp instruction using .exec() command?
Replies: 5
Views: 165

Re: jmp instruction using .exec() command?

thoriqghautsillah wrote:
Tue Oct 04, 2022 10:31 am
dairequinlan wrote:
Tue Oct 04, 2022 9:46 am
Shouldn't it be something like

Code: Select all

sm.exec('jmp("loop")')
?

Caveat, I've never used the PIO functionality, and don't use Python, but a quick scan of the docs would indicate the above
I have tried that before, but still, it doesn't work
What error do you get when trying this?
by jamesh
Tue Oct 04, 2022 12:34 pm
Forum: Troubleshooting
Topic: Raspberry Pi 400 Factory Reset / Make New
Replies: 9
Views: 206

Re: Raspberry Pi 400 Factory Reset / Make New

Couple of option, but easiest is just to reimage the SD card. Another options is a new SD card.

The 400 has no "state" outside the storage medium (the SD card), so changing that is effectively a factory reset.
by jamesh
Tue Oct 04, 2022 10:20 am
Forum: General discussion
Topic: Why are Raspberry Pi's so scarce for so long?
Replies: 68
Views: 4293

Re: Why are Raspberry Pi's so scarce for so long?

In Jeff Geerling's video he didn't say that 400,000 per month was the maximum capacity but that 400,000 a month was what he was told they were currently producing given the supply constraints. He also said that the situation hadn't changed since "supply constraints have prevented us from flexi...
by jamesh
Mon Oct 03, 2022 4:47 pm
Forum: Beginners
Topic: stop removing leading blanks
Replies: 11
Views: 342

Re: stop removing leading blanks

I have no idea what you are referring to. Leading blanks in what?
by jamesh
Mon Oct 03, 2022 4:46 pm
Forum: General programming discussion
Topic: Looking for raspberry pi documentation on the assembly language used?
Replies: 5
Views: 416

Re: Looking for raspberry pi documentation on the assembly language used?

I can find as (I run a Linux box). I assume (right / wrong?) that ARM asm directives, whatever OS they use, may not be appropriate for Raspian. Where can I find a definitive list of usable directives please, instruction list, I assume I can use man as on the rpi 4B for appropriate 'list' of options...
by jamesh
Mon Oct 03, 2022 1:12 pm
Forum: General programming discussion
Topic: Looking for raspberry pi documentation on the assembly language used?
Replies: 5
Views: 416

Re: Looking for raspberry pi documentation on the assembly language used?

Is there any 'official' documentation, without referring to arm or gcc please? You ask for official documentation, but then say you don't want anything from ARM, the providers of the official documentation for the ARM processor used on the Pi? Bit of a dichotomy there. As above, some detail of what...
by jamesh
Mon Oct 03, 2022 12:21 pm
Forum: General discussion
Topic: Have You Guys Considered Making a Prebuilt Raspberry Pi Laptop?
Replies: 30
Views: 1199

Re: Have You Guys Considered Making a Prebuilt Raspberry Pi Laptop?

I have removed the poll, it's not going to be of any use.

Worth considering that we look carefully at future product options, and always have done.
by jamesh
Sun Oct 02, 2022 7:47 pm
Forum: Camera board
Topic: HQ camera full sensor video
Replies: 4
Views: 195

Re: HQ camera full sensor video

The video modes use on sensor binning, which means they are better than a simple sample. So the quality should not be as bad as you think.
by jamesh
Thu Sep 29, 2022 12:10 pm
Forum: General discussion
Topic: Request: Hardware crypto extensions
Replies: 11
Views: 689

Re: Request: Hardware crypto extensions

Why should every user pay for something he/she does not need? Why don't you simply add a TPM module? I'm not sure that a TPM would help. AIUI TPMs are for secure key storage, management and generation not for general crypto acceleration. Even with a TPM you still need to do the actual en/decryption...
by jamesh
Thu Sep 29, 2022 10:03 am
Forum: General discussion
Topic: Request: Hardware crypto extensions
Replies: 11
Views: 689

Re: Request: Hardware crypto extensions

Heater wrote:
Thu Sep 29, 2022 8:14 am
I'm sure the Pi folks are aware of all these things as well.
We are.
Heater wrote:
Thu Sep 29, 2022 8:14 am
So, it's kind of pointless continuing a discussion from a locked thread and campaigning for ones personal favorite feature. They know already.
We do.
by jamesh
Thu Sep 29, 2022 5:37 am
Forum: Raspberry Pi 400
Topic: Any update on black/grey version of the RP400?
Replies: 42
Views: 9649

Re: Any update on black/grey version of the RP400?

Gavinmc42 wrote:
Thu Sep 29, 2022 1:20 am
It's just a matter of finding the time to do it, when we are very busy on other stuff.
Hmm, I like "other stuff" :D
You will indeed.
by jamesh
Wed Sep 28, 2022 12:50 pm
Forum: MicroPython
Topic: print() vs. PIO IRQ (was: PIO parallel input to data buffer is not fast enough)
Replies: 9
Views: 351

Re: PIO parallel input to data buffer is not fast enough

@ghp Thanks for the pointers - I already tried speeding up the IRQ handler using fixed size buffer with no effect. Generating native CPU opcodes could further speed up the IRQ handler but if the print() has higher IRQ priority (?), this won't matter much as at some point in time, a PIO IRQ will not...
by jamesh
Wed Sep 28, 2022 10:09 am
Forum: MicroPython
Topic: print() vs. PIO IRQ (was: PIO parallel input to data buffer is not fast enough)
Replies: 9
Views: 351

Re: PIO parallel input to data buffer is not fast enough

Ok the culprit seems to be the print() function - filling the buffer first and then doing the output results in expected data. The IRQs probably collide or the USB has higher priority. Can this be avoided using the second core? How would one share the data? print functions always takes a very long ...
by jamesh
Wed Sep 28, 2022 10:07 am
Forum: Raspberry Pi 400
Topic: Any update on black/grey version of the RP400?
Replies: 42
Views: 9649

Re: Any update on black/grey version of the RP400?

Interesting. I would have thought that was a "solved problem" since there have been official black/grey Pi cases for years. I was half expecting the response to be a shortage of black resin... The bottom half of the Pi 400 is different than what is on the keyboard so needs a new mold. Inj...
by jamesh
Wed Sep 28, 2022 10:05 am
Forum: Compute Module
Topic: Raspberry Pi CM3 Ethernet and Uboot issue
Replies: 7
Views: 414

Re: Raspberry Pi CM3 Ethernet and Uboot issue

What 6by9 says. Our advice is to take the hit and move to the latest kernel. It's worth just trying thigs to see how much effort it is, you might find its pretty easy.
by jamesh
Wed Sep 28, 2022 10:03 am
Forum: General discussion
Topic: Forum use question
Replies: 10
Views: 458

Re: Forum use question

GHamsz wrote:
Wed Sep 28, 2022 9:43 am
The "big red reply button" in my mind is responding to the initial post.

My question was... Is clicking the " the way you reply to a reply.
Yes, it just replies to the end of the thread.
by jamesh
Wed Sep 28, 2022 10:01 am
Forum: General discussion
Topic: NASA EZIE Mission in need of PI Zeros for Outreach Program
Replies: 14
Views: 834

Re: NASA EZIE Mission in need of PI Zeros for Outreach Program

The EZIE mission, A NASA Heliophysics mission being developed by the Johns Hopkins University Applied Physics Laboratory has a need for a large number of PI Zeros (1000). As part of our outreach program we have developed a low cost ground magnetometer kit, based on a PI zero. We have been funded by...
by jamesh
Tue Sep 27, 2022 5:08 pm
Forum: Wanted
Topic: Looking for bulk Raspberry Pi 2B/3B/3B+
Replies: 13
Views: 1695

Re: Looking for bulk Raspberry Pi 2B/3B/3B+

Try business@raspberrypi.com, we might be able to help depending on use case and quantities.
by jamesh
Mon Sep 26, 2022 6:37 pm
Forum: General discussion
Topic: Is Raspberry Pi4 protected from forced shutdowns?
Replies: 26
Views: 1015

Re: Is Raspberry Pi4 protected from forced shutdowns?

the login page forgets what pdf you where trying to download after you login, you have to click the original pdf link again an for more confusion, it doesnt open in a tab that time, it just downloads it directly i didnt notice, until i had 5 copies in my downloads folder, was wondering why the tab ...
by jamesh
Mon Sep 26, 2022 3:42 pm
Forum: General
Topic: Country of Origin
Replies: 2
Views: 293

Re: Country of Origin

Is that no components at all, or just ones that could be corrupted? (i.e. SoC). Do resistors count for example, as they are "incorruptible"?

The SoC is manufactured in Taiwan, the board is populated in Japan. Not sure of source of other parts, but will try find someone who does know.

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