Subject:
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Re: table brickos light to percent
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 27 May 2004 18:47:56 GMT
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Viewed:
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5293 times
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In lugnet.robotics.rcx.legos, Thomas Jollans wrote:
> i there a table or converter from brickos light readings to light
> percentage ( and vice versa )
Hi Thomas,
Here's the formula used in the dsensor.h include file:
#define ds_scale(x) ((unsigned int)(x)>>6) //!< mask off bottom 6 bits
#define LIGHT(a) (147 - ds_scale(a)/7) //!< map light sensor to 0..LIGHT_MAX
This maps the raw sensor value (range 0x0000 to 0xFFC0) to the
percentage.
Mark
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