On 09/03/17 18:00, Lukasz Sokol wrote:
On 08/03/17 10:14, Mark Morgan Lloyd wrote:> On 07/03/17 19:30, nore...@z505.com wrote:>>> On 02/03/2017 23:54, Paul Robinson wrote:> >> There are five>>> similar "Altoids tin-sized" single board
processors>> I'm aware>>> of.>> >> The Raspberry Pi , The Orange Pi, The Banana Pi, The>>> ODROID, and the>> ASUS Tinkerboard. The Tinkerboard is sometimes>>> referred to as the>>
Maker Board.>> There are also more open source based ones like BeagleBone. There>> is also the $9 "chip" computer Not sure if these count as altoids,>> never heard that before :-)> > American brand :-)>
http://hackaday.com/2017/02/15/piminimint-altoids-rpi-zero-computer/> > >> Beagle bone is more expensive, but more open sourced> > Particularly notable due to a couple of DSP-like processors which> make it good for
high-speed stuff. However unlike the main processor> I believe these have to be programmed in assembler.> Didn't first (single-core) series of RasPI had similar 'theme' ?
with its 'small' ARM processor runs the OS and programs, and the
'massive''Vision' (hence I think, graphics centered) one is just
idling(actually kickstarting the ARM core at boot time only) ?
My recollection is that the processors in the RPi are both ARM variants,
although the one dedicated to graphics has got a lot of extra stuff
bolted on. What the RPi is doing is an interesting alternative to e.g.
writing a loader in Verilog to run in an FPGA, with the objective of
having no ROM-based loader intruding on the address space. It's now at
least semi-open, and I think I've read of interesting stuff being done
with it.
The DSPs in the BB's OMAP chip are general purpose (i.e. rather than
relying on bolted-on special hardware) and are fast enough to do things
like emulating an MFM disc drive in real time (i.e. as a drop-in
replacement for obsolete hardware) or a 100MHz logic analyser
https://hackaday.io/project/4395-beaglelogic or an inline USB sniffer
http://elinux.org/BeagleBoard/GSoC/2010_Projects/USBSniffer
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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