Hello,I'm now at the point where I'll have to dive into building an embeddeddata acquisition system. Last time I did that was about 15 years ago --burn-and-crash with an 68008 and an EPROM, much along the lines ofChapter 11 in AoE (just to illustrate the point at which my uC knowledgefroze over).What I need to do, in real-time, is this -- just to estimate the workload the CPU has to cope with:1. Read out one 16-bit ADC at 60 kHz rate, do a bit with the numbers and write back out to an ADC at the same rate. This is a PI servo loop that also could be done in analog hardware if the CPU isn't up to it.2. Read out three 16-bit ADCs at 20kHz rate and store results in RAM3. Update two 16-bit DACs at 20kHz (numbers come from a couple of Bresenham's algorithms).4. simple link to host Computer, 800kB/sec (SCSI?)Task 1. must run continuously. Tasks 2 and 3 run simultaneously but alternatingly with 4.Based on what I've done I'm partial towards the 68k assembler, so I looked at Freescale's website and found the aged, but pretty attractive MC68332 MCU. Then there's their Coldfire product line which seems to be a bunch of faster/cheaper variants of the same theme.My problem is getting started with all this. I don't want to drag the old EPROM burner out of the basement; I think the latest fad (late as of probably 15 years ago) is in-circuit programmability and -debugging.I'm just wondering into which architecture should I invest time andmoney in terms of a development system, and how much. Unfortunately theapp notes I found on many MCU vendors mainly cover embedded networkingapplications and not the more down-to-earth stuff I'm interested in. Like I said, I like m68k assembler but I've heard good things about ARM, too.Thanks,robert

I reckon an ARM7 such as the Sharp 79524 I'm using would be plenty quick enough. Don't use this one specifically as it had loads of peripherals you won't need but the Phillips LPC range should cater for your needs.There is also a roadmap that takes you up to ARM9 and onwards if you find you want more power.

Not quite good enough, though. ;-> 0:1 Allez les Bleues!-- Hans-Bernhard Broeker (Even if all the snow were burnt, ashes would remain.

Not quite good enough, though. ;-> 0:1 Allez les Bleus!-- Hans-Bernhard Broeker (Even if all the snow were burnt, ashes would remain.

Wich 16-bit MCU?

Jun 29, 2006 26 Replies

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Hans-Bernhard Broeker 20 years ago

Not quite good enough, though. ;->

0:1 Allez les Bleues!

Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de) Even if all the snow were burnt, ashes would remain.

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Hans-Bernhard Broeker 20 years ago

Not quite good enough, though. ;->

0:1 Allez les Bleus!

Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de) Even if all the snow were burnt, ashes would remain.

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Tom Lucas 20 years ago

Don't talk about football!!!!

Just make sure you Germans give them French a kicking in the semis :-)

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Steve at fivetrees 20 years ago

Eh? The French are playing Portugal in the semis. (Although I agree with the sentiment - except that I hope the French give the Portugese a good kicking in the boll^H^H^H^Hsemis.)

Steve

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Tom Lucas 20 years ago

Half-French? But you seemed so polite? :-p

I didn't watch the Brazil game either but at least I had an excuse - I was down the pub!

And could always be guaranteed to be the last kid in his class to have his name called out.

I can't say I really develop an interest but I always feel an obligation in case we win the cup and I miss it. I feel sorry for the people who only watched the Rugby world cup final and missed all the excitement in the build up.

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DJ Delorie 20 years ago

Remind me not to use the word "bazillion" in this forum any more. Too many people from Bazil get offended ;-)

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Steve at fivetrees 20 years ago

;)

And probably next-to-last in the phone book - before ZZZ Cabs....

Steve

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