Go to advanced search

by jamesh
Tue Jul 17, 2018 9:39 am
Forum: Add-ons
Topic: Hardware Specification of the RPi's
Replies: 22
Views: 395

Re: Hardware Specification of the RPi's

He's the one that has been doing a lot of work getting the documentation updated and improved, especially with input form the forum (forum is in his personal time iirc) He one of the Engineers sat in the office. I do quite a bit of forum stuff behind my desk as well as at home, on the train, in bed...
by jamesh
Tue Jul 17, 2018 9:26 am
Forum: Troubleshooting
Topic: Raspi b+ slower than raspi B on image convert
Replies: 2
Views: 29

Re: Raspi b+ slower than raspi B on image convert

Presuming the 3B+ rather than the B+.

So if you take the SD card fomrthe B+ and put it in the B this shows the issue? So exactly the same version of ImageMagick is being used, in fact exactly the same everything?
by jamesh
Tue Jul 17, 2018 9:21 am
Forum: Raspbian
Topic: About Raspbian distribution
Replies: 1
Views: 34

Re: About Raspbian distribution

You can release Raspian with your software, but you MUST, on demand, provide access to the source of any GPL parts, which includes the Linux kernel itself. Since you are using a standard kernel, you could just link to our repo. So really, as long as your software does not use any GPL libraries, you ...
by jamesh
Tue Jul 17, 2018 9:18 am
Forum: Beginners
Topic: Windows 10 - Pi3B+ ----- SOLVED
Replies: 8
Views: 414

Re: Windows 10 - Pi3B+ ----- SOLVED

Hmm, does sounds like we need a comprehensive section on Samba shares in the docs. Shouldn't be that difficult to do, but although the Linux side is fairly simpy, sorting out the permission on the Windows side is a PITA, but tbh, I'm not a Windows expert any more! There is this from the MagPi. https...
by jamesh
Tue Jul 17, 2018 9:16 am
Forum: Compute Module
Topic: What would be the next step up from CM3?
Replies: 26
Views: 1098

Re: What would be the next step up from CM3?

If you want to develop a prototype, the CM3 is the best way to do this. I assume you've already developed and tested your system on a Pi3 and optimised it? If not I'd start there, optimising the software is the best way of getting to the next step. With software improvements, you can usually get fa...
by jamesh
Tue Jul 17, 2018 9:05 am
Forum: Add-ons
Topic: Hardware Specification of the RPi's
Replies: 22
Views: 395

Re: Hardware Specification of the RPi's

Recomended power supply is 5v 2.5A at the board. The official power supply is actually 5.1v to compensate for voltage drop over the supply cable. If in doubt, buy the reasonably priced official power supply. It's always worth noting that we have sold MILLIONS of devices in to commercial or industri...
by jamesh
Mon Jul 16, 2018 10:13 am
Forum: General discussion
Topic: New firmware for the official wireless dongle
Replies: 4
Views: 189

Re: New firmware for the official wireless dongle

Ah, C&P from the previous post, annoying it knackers those. Thanks for the heads up. Should now be fixed.
by jamesh
Mon Jul 16, 2018 10:13 am
Forum: Advanced users
Topic: What would the max frequency of a C program be?
Replies: 4
Views: 142

Re: What would the max frequency of a C program be?

Do you mean the maximum frequency you can run a GPIO at? Not the max frequency that the CPU running the C program is going at?
by jamesh
Mon Jul 16, 2018 9:58 am
Forum: Add-ons
Topic: Hardware Specification of the RPi's
Replies: 22
Views: 395

Re: Hardware Specification of the RPi's

Recomended power supply is 5v 2.5A at the board. The official power supply is actually 5.1v to compensate for voltage drop over the supply cable. If in doubt, buy the reasonably priced official power supply. It's always worth noting that we have sold MILLIONS of devices in to commercial or industria...
by jamesh
Mon Jul 16, 2018 9:52 am
Forum: General discussion
Topic: Announcements
Replies: 33
Views: 17559

Re: New firmware for the Raspberry Pi Wireless Dongle

We have a new beta release of wireless dongle firmware. This is for anyone using this dongle https://www.raspberrypi.org/products/raspberry-pi-usb-wifi-dongle/ This file linked below needs to be copied to the /lib/firmware/brcm folder. You may wish to backup the existing file of the same name just ...
by jamesh
Mon Jul 16, 2018 9:51 am
Forum: General discussion
Topic: New firmware for the official wireless dongle
Replies: 4
Views: 189

New firmware for the official wireless dongle

We have a new beta release of wireless dongle firmware. This is for anyone using this dongle https://www.raspberrypi.org/products/raspberry-pi-usb-wifi-dongle/ This file linked below needs to be copied to the /lib/firmware/brcm folder. You may wish to backup the existing file of the same name just i...
by jamesh
Sun Jul 15, 2018 7:36 pm
Forum: Add-ons
Topic: Hardware Specification of the RPi's
Replies: 22
Views: 395

Re: Hardware Specification of the RPi's

Me!
by jamesh
Sun Jul 15, 2018 7:34 pm
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 173
Views: 18575

Re: RPi 3B+ gigabit ethernet bad download speeds.

Sounds like flow control is not turned on on your router, that will cause these results.
by jamesh
Sat Jul 14, 2018 8:50 am
Forum: Beginners
Topic: how long does it take to get a forum post
Replies: 1
Views: 77

Re: how long does it take to get a forum post

Up to 24hrs depending on day of week and timezone.

Sometimes takes a bit longer.
by jamesh
Fri Jul 13, 2018 1:14 pm
Forum: Advanced users
Topic: Is there a performance penalty to using two byte structs instead of 4?
Replies: 16
Views: 445

Re: Is there a performance penalty to using two byte structs instead of 4?

Cool! I guess similar to C++ templating out liternals.to specific actions.

I guess this is knowledge that the older generation can sometimes not realise; when I started, compilers didn't do this .But suppose when you think about it, its fairly low hanging fruit for optimisation.
by jamesh
Fri Jul 13, 2018 1:11 pm
Forum: Wanted
Topic: Raspberry pi zero (not w or wh), buy several
Replies: 2
Views: 125

Re: Raspberry pi zero (not w or wh), buy several

Please contact [email protected], although I suspect that order quantity will be a little low, might be cheaper just to buy the WH.
by jamesh
Fri Jul 13, 2018 11:30 am
Forum: Advanced users
Topic: Is there a performance penalty to using two byte structs instead of 4?
Replies: 16
Views: 445

Re: Is there a performance penalty to using two byte structs instead of 4?

Seems wasteful to use memcpy for 4bytes. Just cast the pointers to uint32 and write. Avoids the overhead of a function call. Sorry, no its not. @ try.c:39: memcpy(&ups,mvect_buffer+offset,sizeof(struct vector_package)); ldr r3, [r0, #12] There is no function call. Writing things like: *(uint32_t*)p...
by jamesh
Fri Jul 13, 2018 10:54 am
Forum: Troubleshooting
Topic: Rasp 3B+ download speed capped to 63Mbit/s :-/
Replies: 12
Views: 305

Re: Rasp 3B+ download speed capped to 63Mbit/s :-/

Hi, Thanks for your help, I didn't manage to enable Flow control on my R7000 router, however, I learnt that my TP-Link switch (non-managable metal box) manages flow control by default. I tried to connect the Raspberry 3 B+ on it and tadaaaa, from 190 to 220 Mbit/s (stable) :D Cheers A quick Google ...
by jamesh
Fri Jul 13, 2018 10:30 am
Forum: Compute Module
Topic: can a camera share an i2c bus with other devices?
Replies: 6
Views: 248

Re: can a camera share an i2c bus with other devices?

And I've found the naughty step!
by jamesh
Fri Jul 13, 2018 9:45 am
Forum: General discussion
Topic: Wireless firmware testers wanted
Replies: 80
Views: 10694

Re: Wireless firmware testers wanted

Hello again,

For those peoiple using the Official Dongle, we have updated firmware that needs testing.

Please see here for more details . viewtopic.php?f=63&t=187256&start=25#p1340347
by jamesh
Fri Jul 13, 2018 9:09 am
Forum: General discussion
Topic: Announcements
Replies: 33
Views: 17559

New firmware for the Raspberry Pi Wireless Dongle

We have a new beta release of wireless dongle firmware. This is for anyone using this dongle https://www.raspberrypi.org/products/raspberry-pi-usb-wifi-dongle/ This file linked below needs to be copied to the /lib/firmware/brcm folder. You may wish to backup the existing file of the same name just i...
by jamesh
Thu Jul 12, 2018 2:08 pm
Forum: Troubleshooting
Topic: Is THIS the new update?!??!?
Replies: 6
Views: 225

Re: Is THIS the new update?!??!?

Sounds like the modules have not updated correctly. That can upset the USB controller.

Not sure what to suggest. Can you ssh in to it and do the updates again, in case something failed to download?
by jamesh
Thu Jul 12, 2018 12:58 pm
Forum: Troubleshooting
Topic: Raspian pi strech not booting with 3 line error
Replies: 1
Views: 50

Re: Raspian pi strech not booting with 3 line error

That's probably a problem with the SD card. Try reimaging it. If that doesn;t work, it might be a card with a fake capacity, so woudl be worth checking that (google for how)
by jamesh
Thu Jul 12, 2018 12:52 pm
Forum: General discussion
Topic: Thinking of writing a technical FAQ
Replies: 53
Views: 1198

Re: Thinking of writing a technical FAQ

That's the way to do it, having massive sections with howto's in a FAQ just makes them unweildy. Short descriptions + links is the way to go.

I'll add these latest suggestions now.

Go to advanced search