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am 7a813e84: Modify sign of bias in uncalibrated magnetometer

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* commit '7a813e844252612cd8f7fa4e391825477d8b63d0':
  Modify sign of bias in uncalibrated magnetometer
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Etienne Le Grand 2013-04-23 14:38:46 -07:00 committed by Android Git Automerger
commit 4daa2f8ea9
1 changed files with 3 additions and 3 deletions
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6
include/hardware/sensors.h
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@ -442,10 +442,10 @@ enum {
* These values should be continuous (no re-calibration should cause a jump). * These values should be continuous (no re-calibration should cause a jump).
* - 3 fields for hard iron bias estimates: x_bias, y_bias, z_bias. * - 3 fields for hard iron bias estimates: x_bias, y_bias, z_bias.
* Each field is a component of the estimated hard iron calibration. * Each field is a component of the estimated hard iron calibration.
* They represent the offsets to apply to the uncalibrated readings to obtain * They represent the offsets to apply to the calibrated readings to obtain
* calibrated readings (x_calibrated = x_uncalib + x_bias) * uncalibrated readings (x_uncalib ~= x_calibrated + x_bias)
* These values are expected to jump as soon as the estimate of the hard iron * These values are expected to jump as soon as the estimate of the hard iron
* changes. * changes, and they should be stable the rest of the time.
* *
* If this sensor is present, then the corresponding * If this sensor is present, then the corresponding
* SENSOR_TYPE_MAGNETIC_FIELD must be present and both must return the * SENSOR_TYPE_MAGNETIC_FIELD must be present and both must return the