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by PeterO
Mon Oct 15, 2012 11:09 am
Forum: General discussion
Topic: Raspberry Pi with 512mb RAM in the Wild and Element14...
Replies: 213
Views: 52303

Re: Raspberry Pi with 512mb RAM in the Wild and Element14...

I looks like some of the "less stable" elements of recent firmware updates have been rolled back to allow for a stable release with support for newer versions which are aware of the 512Mb boards and their new version numbers.

https://twitter.com/RPF_Dev_Updates

PeterO
by PeterO
Mon Oct 15, 2012 11:00 am
Forum: General discussion
Topic: Is 512mb a good thing?
Replies: 109
Views: 23531

Re: Is 512mb a good thing?

Accelerated X will be a solved problem soon; we've put engineering resource on it, and it's actively being worked on. For me this is more exciting that the 256->512Mb news. I have an application which uses lots of animated windows, and I'm hitting update rate limits due to slow widget drawing speed...
by PeterO
Mon Oct 15, 2012 8:28 am
Forum: General discussion
Topic: Raspberry Pi with 512mb RAM in the Wild and Element14...
Replies: 213
Views: 52303

Re: Raspberry Pi with 512mb RAM in the Wild and Element14...

http://www.element14.com/community/docs/DOC-50776
That page even has revision numbers for the 512Mb version so I think it looks genuine.
I'll know soon enough ;)
PeterO
by PeterO
Sun Oct 14, 2012 7:03 am
Forum: General programming discussion
Topic: Problems getting OpenGLES working
Replies: 6
Views: 1695

Re: Problems getting OpenGLES working

I'm about to start to look at 3D on the Pi. I have some existing openGL applications that I would like to port tot he Pi so I'm interested in seeing your "first steps in openGLES" code if that is possible ?

PeterO
by PeterO
Tue Oct 09, 2012 11:31 am
Forum: Beginners
Topic: connecting monitor?
Replies: 8
Views: 4085

Re: connecting monitor?

you mean DVI ? http://en.wikipedia.org/wiki/Digital_Visual_Interface if so then you need a HDMI to DVI-D cable - like http://www.amazon.co.uk/Premium-HDMI-Cable-Gold-Metre/dp/B000GDI6FC/ref=sr_1_1?ie=UTF8 what is the make and model of your monitor ? 3 rows of 5 pins = VGA 3 rows of 8 pins = DVI The...
by PeterO
Mon Oct 08, 2012 9:11 am
Forum: Python
Topic: Python check every minute
Replies: 16
Views: 7979

Re: Python check every minute

Python is single threaded so there's not much scope for other things happening.

But if you are waiting for external events, then look at the select module that provides access to the Linux poll system call.

PeterO
by PeterO
Sun Oct 07, 2012 7:28 pm
Forum: Python
Topic: Python check every minute
Replies: 16
Views: 7979

Re: Python check every minute

If your program has nothing else to do, then you could use "time.sleep(60.0)" to pause your program for a minute.
PeterO
by PeterO
Sun Oct 07, 2012 7:13 am
Forum: Off topic discussion
Topic: What is the LOWEST level language??
Replies: 33
Views: 8404

Re: What is the LOWEST level language??

Slightly more "on topic".... If you are interested in learning more about 1960s computers, then I'll be releasing this soon:
http://www.peteronion.org.uk/Elliott-80 ... _scrot.png

PeterO
by PeterO
Sat Oct 06, 2012 4:23 pm
Forum: Off topic discussion
Topic: What is the LOWEST level language??
Replies: 33
Views: 8404

Re: What is the LOWEST level language??

If you are interested in 1960s machines, and want more than one chance a year to see one, come and visit The National Museum of Computing. http://www.tnmoc.org/
PeterO
by PeterO
Fri Oct 05, 2012 12:37 pm
Forum: Automation, sensing and robotics
Topic: Raspberry Pi i2c doesn't detect BMP085 sensor.
Replies: 18
Views: 5222

Re: Raspberry Pi i2c doesn't detect BMP085 sensor.

CONNECT AT YOUR OWN RISK . I would try connecting pin 2(5V) to VIN rather than pin 1(3V) to 3V0. However posters suggest that a 5V I2C interface will damage the Pi itself via (presumably) SDA/SCL. It would only be a problem if the external i2c device has bus pull ups fitted that are connected to 5V...
by PeterO
Sun Sep 30, 2012 6:55 am
Forum: User groups and events
Topic: Second Milton Keynes Jam.
Replies: 25
Views: 4146

Re: Second Milton Keynes Jam.

Are you all ready ? :-)
PeterO
by PeterO
Fri Sep 28, 2012 8:14 am
Forum: General discussion
Topic: New Stockist Proto-Pic.co.uk
Replies: 6
Views: 2305

Re: New Stockist Proto-Pic.co.uk

Hmm, what strikes me as dodgy is that proto-pic are advertising them as rev 2.0 when afaict there is no way of gauranteeing rev 2.0 Pis with a farnell order. I could it be that if you are ordering via a business account in the UK then they probably can guarantee that you'll get Rev2 boards because ...
by PeterO
Thu Sep 27, 2012 8:52 am
Forum: Automation, sensing and robotics
Topic: I2c to arduino
Replies: 7
Views: 3206

Re: I2c to arduino

Useful stuff there Nat. I'll be giving this Pi <-> Arduino stuff a try myself soon. I'm building a board for a project that has several 23017s on it to monitor ~ 50 push buttons. Using i2c I'll be able to connect it to my RPi or my Arduino-Mega. Hopefully the code will be very similar on both platfo...
by PeterO
Fri Sep 21, 2012 1:53 pm
Forum: Automation, sensing and robotics
Topic: UK components supplier...
Replies: 10
Views: 2029

Re: UK components supplier...

I've used this for i2c between 5v and 3V3
http://www.skpang.co.uk/catalog/logic-l ... p-511.html

I've got these to play with for GPIO pins.
http://www.skpang.co.uk/catalog/8channe ... -1136.html

PeterO
PS: Just a SKPang customer.
by PeterO
Tue Sep 18, 2012 8:21 pm
Forum: Raspbian
Topic: configure local IP
Replies: 6
Views: 1371

Re: configure local IP

Hmmm I may have been confusing the "auto" with "dhcp" :?

Anyway my "interfaces file" looks like this..

Code: Select all

auto lo

iface lo inet loopback
#iface eth0 inet dhcp

iface eth0 inet static
	address 192.168.1.36
	netmask 255.255.255.0
	network 192.168.1.0
	broadcast 192.168.1.255
	gateway 192.168.1.1
by PeterO
Tue Sep 18, 2012 8:00 pm
Forum: Raspbian
Topic: configure local IP
Replies: 6
Views: 1371

Re: configure local IP

To answer the original question....

The line "auto eth0" needs removing or commenting out with a # at the start.

PeterO
by PeterO
Mon Sep 17, 2012 8:00 pm
Forum: Automation, sensing and robotics
Topic: I2c to arduino
Replies: 7
Views: 3206

Re: I2c to arduino

You would be better off using something like this: http://www.skpang.co.uk/catalog/logic-level-converter-p-511.html It's bidirectional so will work for the SDA signal on i2c. In fact you don't need the two resistive dividers at all , just the two mosfet channels. I'm using one of these between RPI a...
by PeterO
Mon Sep 17, 2012 9:07 am
Forum: Automation, sensing and robotics
Topic: Simple Electronics help needed
Replies: 15
Views: 3324

Re: Simple Electronics help needed

We are going off topic here (my fault, sorry).... Wow, I never even heard of the Eliot 803, but the Wikipedia entry (and your YouTube video) was interesting indeed. I do envy your job BTW. Oh I wish it was my job ! I'm just a volunteer at TNMOC so only there of "fun" on Saturdays normally. I'm assum...
by PeterO
Sun Sep 16, 2012 9:11 pm
Forum: Automation, sensing and robotics
Topic: Simple Electronics help needed
Replies: 15
Views: 3324

Re: Simple Electronics help needed

recantha wrote:Yikes, Peter!
How big is that thing?!?!
I'll show it to you at the next Jam...
But for everyone elsehave a look at about 0:40 in this video
http://www.youtube.com/watch?v=Wa7KVU_e ... ure=relmfu
PeterO
by PeterO
Sun Sep 16, 2012 8:51 pm
Forum: Automation, sensing and robotics
Topic: I2C Problem. Device not write- or readable
Replies: 11
Views: 7005

Re: I2C Problem. Device not write- or readable

Have you checked with a meter for shorts and correct connections? Have you checked the power actually on the chip? Have you checked the oscillator is working? Have you checked that SCL and SDA normally sit at 3V3 when not running any i2c software? Check these then check software The fact that i2cde...
by PeterO
Sun Sep 16, 2012 8:10 pm
Forum: Automation, sensing and robotics
Topic: Power over GPIO???
Replies: 6
Views: 4971

Re: Power over GPIO???

morphy_richards wrote: Also 6v (ie 4 batteries) is too high and needs rectifying.
s/rectifying/regulating/
PeterO
by PeterO
Sun Sep 16, 2012 8:00 pm
Forum: Automation, sensing and robotics
Topic: Simple Electronics help needed
Replies: 15
Views: 3324

Re: Simple Electronics help needed

I'm building a board to opto-isolate all these buttons from my pi!
Image
PeterO
by PeterO
Sun Sep 16, 2012 5:11 pm
Forum: General discussion
Topic: 5.1v and 850mA or 5v and 2.0A?
Replies: 4
Views: 2258

Re: 5.1v and 850mA or 5v and 2.0A?

They should both work just fine, but the 2.0A one is least likely to give trouble if you have any power hungry USB devices plugged in to your PI.
PeterO
by PeterO
Sun Sep 16, 2012 3:06 pm
Forum: Graphics, sound and multimedia
Topic: Crackly audio through 3.5mm jack
Replies: 95
Views: 43850

Re: Crackly audio through 3.5mm jack

Ah, I hadn't realised the firmware could change without update to the kernel release number. Anyway it seems I have version 337302 Ok, just tried it and it sounds to have made an improvement :D but I'll need to check waeforms on my 'scope and look at the waveform to be 100% sure. ('scope is connecte...
by PeterO
Sun Sep 16, 2012 2:38 pm
Forum: Graphics, sound and multimedia
Topic: Crackly audio through 3.5mm jack
Replies: 95
Views: 43850

Re: Crackly audio through 3.5mm jack

rpi-update just updated to 3.2.27+ #151 dated Fri Sep 14 17:00:51
Where is this "latest" version then ?
PeterO

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