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grove.cxx: Improve GroveTemp formula

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Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Sarah Knepper 2014-12-04 10:54:13 +00:00 committed by Brendan Le Foll
parent 751b0f1fe0
commit 5bbdc148c6
1 changed files with 3 additions and 3 deletions
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6
src/grove/grove.cxx
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@ -81,9 +81,9 @@ GroveTemp::~GroveTemp()
int GroveTemp::value ()
{
int a = mraa_aio_read(m_aio);
float r = (float)(1023-a)*10000/a;
float t = 1/(log(r/10000)/3975 + 1/298.15)-273.15;
return (int) t;
float r = (float)(1023.0-a)*10000.0/a;
float t = 1.0/(log(r/10000.0)/3975.0 + 1.0/298.15)-273.15;
return (int) round(t);
}
float GroveTemp::raw_value()