Subject:
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Re: Low level programming of the RCX
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Fri, 12 Sep 2003 16:13:32 GMT
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Viewed:
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3418 times
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In lugnet.robotics.rcx, Kevin L. Clague wrote:
> In lugnet.robotics.rcx, Benjamin Sigonneau wrote:
> > Hello everybody,
> >
> > I try to program the RCX at low level. I want to be able to program
> > using the Hitachi h8/3292 directly. For example, I want to use the
> > free-running timer, define own interrupt handlers and so on. In fact, I
> > *really* need to control the timer (this is for educational purpose).
> >
> > My tries so far leads to failures... I tried using Quite C and libRCX,
> > but I think I have to shortcut some ROM routines (particularly the
> > init_timer routine).
> >
> > Can anyone give me a tip about controlling Hitachi free-running timer
> > directly ? Thanks.
[snip]
> A good place to learn *everything* you want to know about this is brickOS.
[snip]
I'll second that. The BrickOS source code provides a good example of using the
FRC as well as other low-level I/O. Between that source and the H8 manuals, you
should be set.
If you have specific questions, there are quite a few here that should be able
to answer them.
Have fun,
Mark
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Message is in Reply To:
 | | Re: Low level programming of the RCX
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| (...) Quite C is your best place to start with a language. C can give you direct access to the timer. The timer is considered an I/O device, but all I/O on the H8 is memory mapped. Having said that, if you know the address of the timer, you can (...) (21 years ago, 12-Sep-03, to lugnet.robotics.rcx)
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