ARM microprocessors

[Dingo]

Thank Jesus for Easter eh?

Amongst other things I've finally had a little available time to play around with an ARM7 LPC2119 I bought from Futurlec a while back.

I'll probably post some stuff about it soon. Really is a different way of dealing with microcontrollers. 32-bit processing at 60MHz is quite a step up from 8-bit 16Mhz

If nothing else I'd like to look into simple vision processing for robots. Anyone come across some nice links for this sort of thing?

[donburch]

ARM7 ? The DrayTek ADSL modem/router devices which I support at work use ARM9, though I believe the older Vigor 2500's were ARM7 based. Doesn't really matter because DrayTek don't let us anywhere near their program code ;-)

But yes, a 32-bit processor even at 60MHz will be rather useful. Is there an O/S for it, or do you cross-compile on your Windows or linux PC and burn EEPROMS ?

[Bones]

The arm CPU's look pretty good. Nice and powerful.
Have you seen the propeller from Parallax.
An 8 core CPU. Designed specificly for robotics.
Looks promising.

Bones

[donburch]

bones said:

The arm CPU's look pretty good. Nice and powerful.
Have you seen the propeller from Parallax.
An 8 core CPU. Designed specificly for robotics.
Looks promising.

Bones

Parallax's Basic Stamp 2 is, well, very basic and doesn't support interrupts. Thinking about real-time image processing, I've been thinking about powerful CPUs which can run high-level programming (such as C++) with plenty of RAM for complex data structures, and probably a Real-time multitasking O/S.

Some of the research I've done has made me realise that having one super-fast CPU is probably not the best way to go. I can imagine it rolling along nicely ... and the next thing you know the robot smacks into a wall because the CPU was too busy doing some high-level number-crunching analysis and didn't respond to the low-level interrupts.

I haven't had a propper look at Propellor yet, but it sounds like an excellent chip to provide a dedicated processor for each of the robots subsystems - especially on something as complex as your Terminator, Bones - and relieve the main CPU of the mundane tasks like counting encoder clicks. Probably like the way the human consious and subconsious work together.

Hmmm, so I wonder how powerful each of those processors is, and how independent they are ? Off to www.parallax.com/propeller/index.asp for more research...

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