Subject:
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Re: Rom sensor read routine
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sun, 2 May 1999 12:07:15 GMT
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Viewed:
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1130 times
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Hi Kekoa,
Kekoa Proudfoot wrote:
> The rotation code is pretty simple: the expected state machine, with split
> points between the four states of 1bf, 2bf, 3bf:
>
> 000 <= STATE0 < 1bf
> 1bf <= STATE1 < 2bf
> 2bf <= STATE2 < 3bf
> 3bf <= STATE3 < 3ff
I am fixing this right now.
> In my case, since I scan all 4 a/d inputs at once, the one that really
> matters is the first one, a/d input a, which corresponds to sensor 2.
> Without the delay, I get raw 10-bit values for sensor 2 that are off by a
> wildly varying 50-100 units compared to sensors 0 and 1. With the delay,
The current legOS sensor read cycle is this (i=illuminate, c=A/D
conversion)
S1: iii iii iii ccc
S2: ccc iii iii iii
S3: iii ccc iii iii
S4: iii iii ccc iii
If you find your sensor 2 readings to be still accurate, maybe a better
cycle would look like this:
S1: iii iii --- ccc
S2: ccc iii iii ---
S3: --- ccc iii iii
S4: iii --- ccc iii
--
Markus L. Noga noga@inrialpes.fr
Check out legOS! http://www.multimania.com/legos/
"Quand on n'a pas de caractere, il faut bien se donner une methode."
-Camus on Software Engineering
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Message has 1 Reply:
 | | Re: Rom sensor read routine
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| (...) The current LegOS model really hammers the sensors, almost to the point of oversampling them. It only takes a short while (less than 0.1 ms, I think) to sample all four sensors; I think LegOS samples the next sensor immediately after finishing (...) (25 years ago, 13-May-99, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Rom sensor read routine
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| In writing some sensor code yesterday/today (it's 6 am), I passed over the ROM sensor code at 14c0. The documentation has been put in the usual place. The rotation code is pretty simple: the expected state machine, with split points between the four (...) (25 years ago, 25-Apr-99, to lugnet.robotics.rcx.legos)
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