Subject:
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Re: rotation sensor thing solved
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 27 Jul 2000 19:28:32 GMT
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Viewed:
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1547 times
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On Thu, 27 Jul 2000, John A. Tamplin wrote:
> On Thu, 27 Jul 2000, Luis Villa wrote:
>
> > OK, so I had forgotten that for whatever reason legOS rotation sensors are
> > very, very sensitive to dying batteries. I think that when underpowered,
> > they either don't generate an interrupt or the voltage on the interrupt is
> > too weak and the signal gets missed. So, new batteries and voila...
> > everything works fine. /me wipes brow :)
>
> Actually, the sensors themselves don't generate an interrupt. The interrupt
> to read the sensors is from a timer, and it just cycles through the
> sensors waiting to read the next one. This may be related to the problem
> Kekoa mentioned about legOS powering the active sensors less than the
> official firmware.
Powering them more frequently but for a shorter time, you mean? Yes- I do
see your point. This will be something to keep track of when/if we mess
with the sensors in 0.2.x.
BTW, in hindsight, this should have been obvious- the reason that the
sensors weren't recording when I was moving (and were when I was
"processing") is probably because of the draw of the motors during
movement.
Luis
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fish are jumping and the cotton is high...
So hush, little baby, baby don't you cry."
-Ella
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Message has 1 Reply:
 | | Re: rotation sensor thing solved
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| (...) This is a quite interesting situation to test. When I released patched sensors routines, I've tested the sensor values (expecially rotation one) with batteries full and with very exausted batteries, but never with exausted batteries and motors (...) (24 years ago, 27-Jul-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: rotation sensor thing solved
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| (...) Actually, the sensors themselves don't generate an interrupt. The interrupt to read the sensors is from a timer, and it just cycles through the sensors waiting to read the next one. This may be related to the problem Kekoa mentioned about (...) (24 years ago, 27-Jul-00, to lugnet.robotics.rcx.legos)
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