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by DaveTheWalker
Thu Aug 18, 2016 8:28 am
Forum: Media centres
Topic: OSMC control via Python
Replies: 2
Views: 1080

Re: OSMC control via Python

Hi Scotty,

That looks like a great call - I'll check it out. I've installed it, and I'm going through the documentation, but it looks to be very close to what I need.

Thanks again,
Dave
by DaveTheWalker
Wed Aug 17, 2016 10:37 am
Forum: Media centres
Topic: OSMC control via Python
Replies: 2
Views: 1080

OSMC control via Python

Hello all, I have a project that I'd like some help with. I'm trying to make a media centre that interfaces with some control hardware (could be buttons, could be something else - not relevant for this part of the conversation). What I need is to be able to get OSMC to automatically play a video/son...
by DaveTheWalker
Wed Dec 18, 2013 9:13 am
Forum: Wolfram Language
Topic: No more memory available
Replies: 7
Views: 15271

Re: No more memory available

Thanks for your help... I still get this, though: In[1]:= WeatherData[{"Abingdon","Oxfordshire","UK"},"Temperature"] Initializing WeatherData indices .... Initializing WeatherData indices .... Initializing CityData indices .... Initializing CityData indices .... Initializing CityData indices .... In...
by DaveTheWalker
Wed Nov 27, 2013 2:15 pm
Forum: Mathematica
Topic: Saving programs, and Internet connection
Replies: 4
Views: 2397

Re: Saving programs, and Internet connection

Thanks Dougie - I got the net connection working eventually!.... now, any idea how to save a program?
by DaveTheWalker
Wed Nov 27, 2013 10:43 am
Forum: Wolfram Language
Topic: No more memory available
Replies: 7
Views: 15271

No more memory available

I'm trying a relatively simple WeatherData request on my Model B (256MB) - I've set the memory split to only give 16MB to the graphics, but I get this error. Any ideas? In[1]:= WeatherData["Harwell"] Installing data from Wolfram Research data server .... Initializing WeatherData indices .... Initial...
by DaveTheWalker
Wed Nov 27, 2013 9:31 am
Forum: Mathematica
Topic: Saving programs, and Internet connection
Replies: 4
Views: 2397

Re: Saving programs, and Internet connection

Sorry, this should be in the Wolfram Language forum!

Could a moderator move it for me?

Thanks!
by DaveTheWalker
Wed Nov 27, 2013 9:27 am
Forum: Mathematica
Topic: Saving programs, and Internet connection
Replies: 4
Views: 2397

Saving programs, and Internet connection

Hello, I've been having fun with the command-line Wolfram Language interpreter across a serial terminal (The graphical one is WAY too slow on my 1st gen. Pi). I have a couple of queries: 1) How do I save a session to a file, or write a program so I can run it later? 2) I can't get it to connect to t...
by DaveTheWalker
Wed Nov 20, 2013 9:21 am
Forum: Gertboard classic
Topic: Gertboard, RISC OS and BASIC
Replies: 18
Views: 6310

Re: Gertboard, RISC OS and BASIC

Hi Gert,

I noticed that Farnell are now advertising the Gertuino....but there's still no data on it! Can you spill the beans yet?

Dave
by DaveTheWalker
Thu Oct 10, 2013 1:45 pm
Forum: Other projects
Topic: Bugblat PIF FPGA board
Replies: 2
Views: 1508

Bugblat PIF FPGA board

Has anyone seen this yet?

http://www.bugblat.com/products/pif/

Looks like an excellent step up from the Guzunty CPLD board, and is reasonably priced...although shipping is a bit of a drag to the UK.

Anyone tried one yet??? It's on my Christmas list!
Dave
by DaveTheWalker
Thu Aug 22, 2013 7:15 am
Forum: Other projects
Topic: Controlling many lights individually
Replies: 20
Views: 6148

Re: Controlling many lights individually

Something like this might come in handy: http://www.adafruit.com/products/1378 It seems that controlling LEDs is a common task. These chips require a stable clock source, so offloading some of the control to an Arduino might be a way forward, but you could still use to Pi to oversee the whole job an...
by DaveTheWalker
Wed Aug 21, 2013 1:45 pm
Forum: Other projects
Topic: Digital gauges
Replies: 5
Views: 2845

Re: Digital gauges

You'd do well to look into the OBD-II on-board diagnostics interface, and maybe consider looking at something like the "Torque" Android app for some pointers. If you want to do it with the Pi, I think there are some other OBD projects on the go at the moment - have a search around the forum and see ...
by DaveTheWalker
Tue Aug 06, 2013 8:03 am
Forum: Other projects
Topic: DIY RGB LED Controller *Help*
Replies: 3
Views: 2686

Re: DIY RGB LED Controller *Help*

It looks like what you need is three PWM channels. Software-controlled PWM (Pulse-Width Modulation) would probably be fine for your application. Have a look through the forums and see if anyone's got three independent PWM channels running on a Pi already. If so, then all you'll need are three driver...
by DaveTheWalker
Fri Aug 02, 2013 8:17 am
Forum: Other projects
Topic: CPLD Programming over GPIO
Replies: 21
Views: 8077

Re: CPLD Programming over GPIO

Hi Peter, I just spoke to Cypress, because I was surprised to see the PSoC5 discontinued... Good news! The PSoC 5 was an early release silicon with some de-rated features to get the part in to production for some lead customers. This has been replaced by the PSoC 5 LP. The specification of this part...
by DaveTheWalker
Thu Aug 01, 2013 3:45 pm
Forum: Other projects
Topic: CPLD Programming over GPIO
Replies: 21
Views: 8077

Re: CPLD Programming over GPIO

Just to chip in on this thread... A while back, I had the opportunity to play with some Cypress PSoC5 chips: http://www.cypress.com/?id=2233 They have a programmable CPLD section, an embedded processor and some configurable analogue blocks. At the moment, it's all set up using their drag-and-drop gr...
by DaveTheWalker
Thu Aug 01, 2013 3:40 pm
Forum: Other projects
Topic: Zeo + RasPi In An Attempt to Trigger Lucid Dreaming
Replies: 4
Views: 1522

Re: Zeo + RasPi In An Attempt to Trigger Lucid Dreaming

I also have a Zeo and a Pi... I'd be interested in any updates
by DaveTheWalker
Tue Jul 30, 2013 8:02 am
Forum: Other projects
Topic: Calibration of temperature sensor
Replies: 1
Views: 553

Re: Calibration of temperature sensor

Well, at sea level melt-water from ice (that still has ice in it) is always at 0 degrees Celsius.

Alternatively, do what everyone else does and cross-calibrate with a thermometer you trust.
by DaveTheWalker
Tue Jul 30, 2013 7:37 am
Forum: Other projects
Topic: CPLD Programming over GPIO
Replies: 21
Views: 8077

Re: CPLD Programming over GPIO

Hi - sounds like fun! You say you don't have a GuzuntyPi, but you've obviously heard of them, and what you're trying to do is almost exactly the same as what happens on the Guzunty. I suggest you read through all the documentation for that project (schematics, software tools etc..) until you underst...
by DaveTheWalker
Tue Jul 23, 2013 12:52 pm
Forum: Other projects
Topic: RPi remote sensor.
Replies: 4
Views: 1119

Re: RPi remote sensor.

If you're feeling *really* adventurous, you could try something like this:

https://www.sparkfun.com/products/10138

;)
by DaveTheWalker
Mon Jul 22, 2013 9:45 am
Forum: Other projects
Topic: High speed data acquisition AND real time processing
Replies: 14
Views: 7913

Re: High speed data acquisition AND real time processing

Anyway, LTC2315-12 looks like a nice chip I need source it somewhere http://uk.farnell.com/linear-technology/dc1563a-a/ltc2315-12bit-5msps-sar-adc-eval/dp/2327950?Ntt=LTC2315-12 Farnell have an evaluation board, which might be a nice way to get into testing with this chip. If you're outside the UK,...
by DaveTheWalker
Thu Jul 18, 2013 3:48 pm
Forum: Other projects
Topic: Providing power for intermittent power loss
Replies: 15
Views: 6940

Re: Providing power for intermittent power loss

Just thought I'd throw in my tuppence-worth. Trickle charging NiMHs is OK, but not really "supported" by the manufacturers. Having discussed it at length with some of the manufacturers, I can report that a charge current of C/30 will do no damage at all under most conditions. Therefore, if you have ...
by DaveTheWalker
Thu Jul 18, 2013 3:37 pm
Forum: Other projects
Topic: High speed data acquisition AND real time processing
Replies: 14
Views: 7913

Re: High speed data acquisition AND real time processing

good call Elektrknight ;) Still, everyone has an upgrade in mind for the future, right?!
by DaveTheWalker
Thu Jul 18, 2013 3:02 pm
Forum: Other projects
Topic: High speed data acquisition AND real time processing
Replies: 14
Views: 7913

Re: High speed data acquisition AND real time processing

You might consider a Guzunty CPLD to take some of the SPI overhead off the main processor...
by DaveTheWalker
Fri Jul 12, 2013 10:35 am
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 27872

Re: Guzunty Pi. New users start here.

Quick additional query - when driving a clocked core, do I need to bridge JP11 so that GCK1 can get across?

If not, how do I clock it?

If so, how does gz_test work without this link??

Many thanks,
Dave
by DaveTheWalker
Thu Jul 11, 2013 3:41 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 27872

Re: Guzunty Pi. New users start here.

Woohoo!

It works now. You're a genius :D Thanks for helping me to get my "Hello World" inverter off the ground - I really appreciate it.

Cheers,
Dave
by DaveTheWalker
Thu Jul 11, 2013 3:03 pm
Forum: Other projects
Topic: Guzunty Pi. New users start here.
Replies: 186
Views: 27872

Re: Guzunty Pi. New users start here.

Well, I followed this guide to make an xsvf file and got one with about 101kB: http://dangerousprototypes.com/docs/Export_%28X%29SVF_from_Xilinx_ISE_Webpack (and actually, it's the same as your method) but I get this error message: pi@raspberrypi:~/Dave/guzunty$ sudo gz_load in1_out2.xsvf Guzunty lo...

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