Groups > comp.lang.forth > #21955

Re: Possible Forth target (Beaglebone RTU)

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	Re: Possible Forth target (Beaglebone RTU)
Date	2013-04-26 18:20 -0700
Organization	Nightsong/Fort GNOX
Message-ID	<7xr4hwojl3.fsf@ruckus.brouhaha.com> (permalink)
References	<7xobd3dolk.fsf@ruckus.brouhaha.com> <kleehq$unu$1@dont-email.me>

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rickman <gnuarm@gmail.com> writes:
> I agree that it has possibilities.  But what would be the app?

It's for stuff needing more precise timing than you can get with Linux
GPIO.  Examples might be things like bit banging special purpose
hardware protocols, controlling motors, or perhaps even making a
software defined radio or digital oscilloscope ;-).  Doing that in Forth
sounds like less hassle than doing it with some yucky cross-assembler.

I saw someplace else that the PRU's run at half the clock speed of the
main CPU, which on this board would put the PRU's at 500 MHz, pretty
impressive.  Register instructions are apparently one cycle.  I don't
know about memory instructions or jumps.  That info might be somewhere
in the docs, which I have only glanced at.

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Thread

Possible Forth target (Beaglebone RTU) Paul Rubin <no.email@nospam.invalid> - 2013-04-25 01:03 -0700
  Re: Possible Forth target (Beaglebone RTU) rickman <gnuarm@gmail.com> - 2013-04-26 13:49 -0400
    Re: Possible Forth target (Beaglebone RTU) Paul Rubin <no.email@nospam.invalid> - 2013-04-26 18:20 -0700
      Re: Possible Forth target (Beaglebone RTU) rickman <gnuarm@gmail.com> - 2013-04-28 18:23 -0400
        Re: Possible Forth target (Beaglebone RTU) Paul Rubin <no.email@nospam.invalid> - 2013-05-06 00:07 -0700

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