Subject:
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Re: Replacement Firmware Released
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 25 Dec 2004 03:00:58 GMT
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Viewed:
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1554 times
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"dan miller" <lego-robotics@crynwr.com> wrote in message
news:20041224140135.96996.qmail@web20026.mail.yahoo.com...
> I can say with assurance that the firmware that shipped with my RIS 2.0
> does indeed brake fully no
> matter what the power. I started looking into this precisely because
> the new firmware behaves
> differently. If that's a feature and not a bug, fine -- but it is
> definitely a compatibility
> issue, as my code needs to be changed to remain consistent in
> behavior. Perhaps there could be a
> "100% Lego firmware compatible" flag?
You're absolutely right. It's a bug. I feel so stupid. I will fix in the
next firmware release. I will simply remove the variable braking option.
The objective for new firmware is compability with existing firmware. I
had been under the mistaken impression that braking in standard firmware
was variable power. I plead confusion by previous posts like "...But
motor.stop is also affected by the power level, e.g. it will brake very
softly if the power level is 1." but when I went back and looked at it
again I realized it was a LeJos reference.
By the way, I recently implemented a new intrinsic variable to use
"signed' power. Negative values indicate reverse direction and positive
values are forward. Zero is brake. I found it simplies setting power and
direction for some PID algorithms I was implementing. This new intrinsic
will be in the next release.
I'm targeting the next release for Dec 26 day.
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Message has 1 Reply:
 | | Re: Replacement Firmware Released
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| (...) I think if you we're stupid that would make the rest of us amoeba! (...) Don't do that, I was planning on using it. I'm building a test rig where I will be using a non-geared motor (As a generator) to impose a variable loads. (...) If it's (...) (20 years ago, 25-Dec-04, to lugnet.robotics)
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Message is in Reply To:
| | Re: Replacement Firmware Released
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| I can say with assurance that the firmware that shipped with my RIS 2.0 does indeed brake fully no matter what the power. I started looking into this precisely because the new firmware behaves differently. If that's a feature and not a bug, fine -- (...) (20 years ago, 24-Dec-04, to lugnet.robotics)
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