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grove.cxx: drop ADC resolution to 10bit for calculation
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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@ -79,8 +79,9 @@ GroveTemp::~GroveTemp()
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int GroveTemp::value ()
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{
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int a = mraa_aio_read(m_aio);
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a = a >> 2;
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float r = (float)(1023-a)*10000/a;
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float t = 1/(logf(r/10000)/3975 + 1/298.15)-273.15;
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float t = 1/(log(r/10000)/3975 + 1/298.15)-273.15;
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return (int) t;
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}
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