I think I have a way to define what a raspberry pi is. It's not a
microcontroller, and it's not exactly a desktop computer... it's a System
on a Chip, SoC. The essence of a SoC is it's system bus, that connects
many useful IP cores like processors, memory controllers, DMA, cache, JTAG,
SPI, I2C, UART, etc. in a multi-master addressable system on a single
integrated circuit.
Whether you look at an Apple A6, a Qualcomm Snapdragon, or a Samsung
Exynos, they're all SoC ARM devices with some magic dust that is vendor
specific.
The Raspberry Pi uses a stripped down, older ARM SoC technology, that's why
it's $35. It may not make an iPhone5, but it could go toe-to-toe with the
iPhone1. Either way, it's the first "open" SoC for under $50 and that's
why it's a huge deal. And a very cool platform to build on. I've got one.
On Wed, Apr 17, 2013 at 1:53 PM, Kristoff Bonne <krist...@skypro.be> wrote:
> Hi All,
>
>
>
>
> On 17-04-13 21:17, Netzblockierer wrote:
>
> Am 17.04.2013 21:08, schrieb Bruce Perens:
>
> Hi Luis,
>
> The Raspberry Pi would be a good platform for this. We have a demo on it
> currently and I've thought about mounting one in a microphone. We will get
> around to implementing on lower-priced ARM processors, probably down to $5.
> The main requirements are hardware floating point and the ability to handle
> tables larger than 64K.
>
> The Raspberry Pi is a computer. There are much cheaper reprogrammable
> DSP's/Microcontrollers from TI, that are about $5/pcs ...
>
>
> Well, my opinion on this is that is kind-of depends what the target
> "market" is for what you are making.
>
> For me, (besides doing this form myself to learn about digital voice and
> digital communication), the main goal -at this point- is to create a
> solution to allow hams to experiment with digital voice using their
> existing FM equipement, by preference in a package that can also be used in
> a "mobile" enviroment.
> For that purpose, the RPi fits very nicely. It's powerfull enough, it's
> relative cheap and it's relative small.
>
> I agree; if you developing your own board and start shopping around for
> equipement, you could probably end up with a device that will be cheaper
> that is cheaper then the pi, however:
> - how much work would it need? hardware developement
> - how much software work would it need?
> - would the software be in a form that can easily be ported to other
> platforms?
> - would the software be in a form that can easily be understood by other
> people
>
> For me, tt's not about creating the smallest possible device or cheapest
> option; or the most advanced device. It's about finding a balance between
> the amount of work needed to get something done and the price.
>
> For me, the big advantage of the RPi is that it exists, it's easy to find,
> it can be expanded pretty easy, there are a lot people using it (so you can
> find help for it pretty easy) and it looks not that much unlike the other
> platforms out there (say beaglebone, PCduino, ...). It allows hams to buy
> the device, build their own expansion board or top of it and start using it.
>
>
>
> Now, don't get me wrong. I have absololutely nothing against all the other
> microcontroller, FPGA, ... projects out there and people trying to develop
> their own thing. One of the very nice things about the codec2 project is
> that it seams to bring people together from a very large scale of
> experience and background. I would really like to have the experience and
> knowledge you guys have.
>
> My point is just, if you look at -say- "hackaday" or websites like that,
> most of these projects are done by using a generic platform (RPi, arduino,
> pic, ...) and building their own thing "on top of it". It may not be best
> device with the best "performance per cent" ratio; but -at least- it is a
> device that people can get there hands on.
>
> After all, if the price for a device to do DV over VHF would cost 20 euro,
> 30 euro or 40 euro, I don't think that will really make that much of a
> difference. Most ham-equipement (especially for digital voice
> communication) is in a price-range that is at least 5 times that!
>
> But, to be clear, I will surely follow the different uC, FPGA and
> DSP-based projects out there! It's great to see all the activiy out there!
>
>
> 73
> Kristoff - ON1ARF
>
>
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