I just wish that any of these guys had Open Source graphics drivers. Not
the Allwinner A10 and not TI Sitara. Oddly enough, nVidia has been
opening up after all of these years, and there is an Open 3D driver for
Tegra now, so they become more attractive.
On 4/17/2013 2:03 PM, Chris Testa wrote:
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
<mailto: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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