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samples: shields: lmp90100_evb: rtd: mark constants as const

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Mark the constant coeffiecients used in the RTD resistance to
temperature conversion as const.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2021-02-20 19:03:22 +01:00 • committed by Carles Cufí
commit e51e980f8b
1 changed files with 2 additions and 2 deletions
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4
samples/shields/lmp90100_evb/rtd/src/main.c
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@ -43,8 +43,8 @@ static double sqrt(double value)
static double rtd_temperature(int nom, double resistance)
{
double a0 = 3.90802E-3;
double b0 = -0.58020E-6;
const double a0 = 3.90802E-3;
const double b0 = -0.58020E-6;
double temp;
temp = -nom * a0;