Raspberry Pi Forums

AndrewS

I received the following (slightly confusing) email from RS today (Monday), so I've emailed them back asking for clarification. Please note the Raspberry Pi and accessories can no longer be purchased through the Pi store; however you may find an answer to your question using the link below. http://w...

AndrewS

Dunno if the driver has been written yet - see the few comments here http://www.raspberrypi.org/forums/viewt ... 63#p587463

You do realise that with two chip-selects, you can connect two SPI devices to SPI0

AndrewS

Seems to be another camera issue which has been identified here:
http://www.raspberrypi.org/forums/viewt ... 84#p602684

AndrewS

paphko wrote:I wonder whether this issue can be reproduced by someone else or is it just me

I was able to reproduce this, so I added a comment to http://www.raspberrypi.org/forums/viewt ... 43&t=83353

AndrewS

Secondly/alternatively any pointers on where to look for guidance on how to set up the buttons on the PiFace Control and Display to change Picamera parameters and then to take photos/ videos i.e. In the field I want to pick from options rather than type in the python commands. This would be great w...

AndrewS

sir_guy123 wrote:but I don’t see what makes the variable true or false?

See e.g. the comments on http://stackoverflow.com/questions/1748 ... -in-python

AndrewS

NotARacistK wrote:BTW I wonder if my Pi can even read battery stats.

http://www.raspberrypi.org/forums/viewt ... 37&t=84624

AndrewS

Possibly you'd need to power via the GPIO header, but add your own "protection" ?
https://github.com/raspberrypi/hats/blo ... pio-header

AndrewS

I'd like to know too... http://www.raspberrypi.org/forums/viewtopic.php?f=43&t=81999&p=599457#p599457 I emailed both Farnell and RS, and Farnell said "Our product manager for these isn't back until the week after next, so I've no way of finding out until then", and RS have yet to reply :( Which I gu...

AndrewS

It's not quite the same as what you're looking for, but maybe http://www.raspberrypi.org/jayme-gisbournes-porta-pi/ will give you some ideas too

AndrewS

With an image only 800 pixels wide, it'll obviously be impossible to discern all 30670 data-points, so maybe you could somehow 'prune' the amount of data you plot? :? (e.g. only plot every 10th point or something) Obviously it's highly dependent on your data-set whether that'll be a suitable comprom...

AndrewS

Is there some authenticate signing process on RPi kernel Nope, it just runs a bog-standard kernel: http://www.raspberrypi.org/documentation/linux/kernel/README.md And in fact the kernel doesn't have to be Linux, it could also be RISC OS, or one of the BSDs, or Plan9... :) http://www.raspberrypi.org...

AndrewS

You may find this cross-reference useful

AndrewS

You could try looking at http://www.raspberrypi.org/pypy-2-1-beta-released/ but I suspect that may not work with all of the extra modules you're using. I've never looked at speeding up 'import' myself, but I guess you could try overclocking your Pi, or maybe you simply need a faster platform than Ra...

AndrewS

http://www.raspberrypi.org/documentatio ... /README.md has more info about the hello_* programs.

You could also take a look at fbi (Frame Buffer Imageviewer) - install it with 'sudo apt-get install fbi'

AndrewS

pluggy wrote:I'm wondering what difference the board revision would make to a touch screen ?

Probably something to do with which I2C channel it needs to communicate on? (The i2c channel available on the GPIO header changed between revisions 1 and 2)

AndrewS

IIRC the Raspberry Pi "stable kernel" (as shipped in the firmware repo, currently 3.12.y) went something like 3.2.y -> 3.6.y -> 3.10.y -> 3.12.y Any other branches/versions are just experimental / test versions. I wouldn't expect the "Raspberry Pi stable kernel" to jump to 3.16.y until that version ...

AndrewS

Let's try and avoid an off-topic flamewar, eh?

AndrewS

I'm afraid I don't have much familiarity with initramfs, but just to point out that kernel updates can also come from rpi-update, and that has no special handling for (or knowledge of) kernel version changes, it simply always copies 'the latest' file across (even if the kernel.img in the repo is ide...

AndrewS

I don't often update the firmware; I rebuild the kernel more frequently. When I update the firmware I just copy boot/* onto my /boot partition; I don't name the kernel I build 'kernel.img' so this just works (and I don't copy the firmware modules directory either.) That's exactly what the https://g...

AndrewS

Just to complicate matters, rpi-update actually pulls it's "firmware files" from https://github.com/Hexxeh/rpi-firmware ;) (but AFAIK that repo gets automatically updated by popcornmix at the same time he updates https://github.com/raspberrypi/firmware). John - AFAIK (in my limited experience) your ...

AndrewS

I actually meant more what were you trying to (originally) do by adding so many 'unusual' entries to your sources.list, but if you consider this problem now solved then it doesn't matter

AndrewS

I have openelec, raspian and pidora, if I enter in recovery mode and choose openelec and raspian be will overwrite my settings? Yes, changing which OSes are installed via NOOBS (even if it's only 'deselecting one') always wipes everything and starts again from a clean slate. It was designed as a "r...

AndrewS

Thx for your replies, im considering them. Say that i need one or two more UART interfaces, i have looked it up but im not sure if i understood it correctly. Can i connect this with a usb-to-usb cable to my Raspberry Pi (b+)? Will i have successfully acquired one more UART interface just by connect...

AndrewS

The order of the LED and resistor doesn't matter, i.e. "GPIO - LED - Resistor - ground" works identically to "GPIO - Resistor - LED - ground". The only think you need to watch out for is which way around you plug in the LED - if you plug it in "backwards" nothing bad will happen, it simply won't lig...

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