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Subject: Re: Ada, the best language with the not-so-best tool chain
From: kalvin.news@gmail.com
Cc: mailbox@dmitry-kazakov.de
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Date: 2012-10-09T11:26:52-07:00
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tiistai, 9. lokakuuta 2012 20.08.16 UTC+3 Dmitry A. Kazakov kirjoitti:
> On Tue, 9 Oct 2012 08:53:01 -0700 (PDT), kalvin.news@gmail.com wrote:
> 
> 
> 
> > tiistai, 9. lokakuuta 2012 16.17.55 UTC+3 Dmitry A. Kazakov kirjoitti:
> 
> >> The problem is that an integrated I/O usually has only on ADC. So to
> 
> >> measure two inputs you need twice so much time plus the time needed to
> 
> >> switch the ADC to another line. This is how you quickly come over 10ms. Not
> 
> >> to forget inability to measure inputs and change the outputs synchronously.
> 
> > 
> 
> > Quite a few microcontrollers have two or more A/D inputs and D/A outputs
> 
> > that can sample simultaneously and update outputs synchronously.
> 
> 
> 
> That is why GPIO is useless in my eyes.
> 
> 
> 
> > If one needs more simultaneous sampling A/D inputs or D/A outputs, then
> 
> > one may have to use an external IC for this.
> 
> 
> 
> http://www.beckhoff.com/english/ethercat/el3054.htm
> 
> http://www.beckhoff.com/english/fieldbus_box/ep3174.htm
> 
> etc

Small embedded systems comes in this price range and consume very little power:
https://www.olimex.com/Products/ARM/ST/STM32-E407/
And, the real-time performance beats Windows by a decade or two. ;)

- Kalvin