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Fix readTemperature function #31

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Fix readTemperature function #31

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15 changes: 14 additions & 1 deletion src/SparkFunLSM9DS1.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -607,13 +607,26 @@ int16_t LSM9DS1::readMag(lsm9ds1_axis axis)
return 0;
}

typedef union
{
struct
{
int16_t data :12;
int16_t Reserved :4;
};
int16_t word;
} int12_t;

void LSM9DS1::readTemp()
{
uint8_t temp[2]; // We'll read two bytes from the temperature sensor into temp
if ( xgReadBytes(OUT_TEMP_L, temp, 2) == 2 ) // Read 2 bytes, beginning at OUT_TEMP_L
{
int12_t degree;
degree.word = ( ( int16_t )temp[ 1 ] << 8 ) | ( int16_t ) temp[ 0 ];

int16_t offset = 25; // Per datasheet sensor outputs 0 typically @ 25 degrees centigrade
temperature = offset + ((((int16_t)temp[1] << 8) | temp[0]) >> 8) ;
temperature = offset + degree.data / 16;
}
}

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