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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Fri, 24 Dec 2004 14:01:35 GMT
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Original-From:
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dan miller <DANBMIL99@YAHOO.COMsaynotospam>
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Viewed:
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1478 times
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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 -- 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?
As for the switch timing issue, I can see the need for a delay, but I don't understand why my
motor is consistently running in one direction preferentially. I'll look into this further.
Again, thanks for an excellent piece of work.
--- Dick Swan <dickswan@sbcglobal.net> wrote:
> I'm pretty sure that variable strength braking is in fact the
> implementation in the standard firmware. Braking is proportional to the
> current setting of the power level. I think there may even be some
> ancient posts somewhere in Lugnet on this topic.
>
> "Philippe Hurbain" <philohome@free.fr> wrote in message
> news:I96EKv.1s7x@lugnet.com...
> > > 1) braking seems to be proportional to power (at power=0, brake is
> > > not very effective) -- Lego
> > > firmware appears to brake at full power no matter what the power
> > > setting is. My guess is that the
> > > 'brake' function (shorting out the motor) is only being effected
> > > during the 'on' phase of the PWM
> > > routines.
> >
> > Agreed. Beeing able to control break strength is an interesting
> > feature, but it
> > is incompatible with standard firmware. Maybe it should be controlled
> > by a
> > variable similar to bFloatDuringInactiveMotorPWM
>
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Message has 1 Reply:
 | | Re: Replacement Firmware Released
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| "dan miller" <lego-robotics@crynwr.com> wrote in message news:20041224140135....hoo.com... (...) 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 (...) (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'm pretty sure that variable strength braking is in fact the implementation in the standard firmware. Braking is proportional to the current setting of the power level. I think there may even be some ancient posts somewhere in Lugnet on this topic. (...) (20 years ago, 23-Dec-04, to lugnet.robotics)
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