PNI CompassPoint Prime - Manual (Page 46)

PNI Sensor Corporation DOC# 1014177 r08
Prime User Manual – July 2011 Page 40
kUserCalStableCheck (Config. ID 11
d
)
This flag is used during field calibration. If set to FALSE, a calibration point can be
taken if the magnetic field is stable to <23 µT for each axis. If set to TRUE a
calibration point can be taken if the magnetic field is stable to <5 µT for each axis.
kUserCalNumPoints (Config. ID 12
d
)
The user must select the number of points to take during a field calibration. The
number of points must be within “Allowable Range”. Performance may suffer
somewhat, but still be acceptable for the application, if the number of calibration
points is less than the “Minimum Recommended” value.
Table 7-5: Number of Calibration Points
Calibration Mode
Number of Calibration Points
Allowable
Range
Minimum
Recommended
Magnetic Sensor Only 10 to 32 12
Accelerometer Only 12 to 32 18
Mag and Accel 12 to 32 18
kUserCalAutoSampling (Config. ID 13
d
)
This flag is used during field calibration. If set to TRUE, the module automatically
takes calibration sample points until the kUserCalNumPoints number of calibration
points is taken. When auto-sampling, a new calibration point is taken when the
kUserCalStableCheck condition is met and the change in the magnetic field from the
prior calibration point exceeds 30 µT for at least one axis. If set to FALSE, the Prime
waits for the kTakeUserCalSample frame to take a calibration point.
kBaudRate (Config. ID 14
d
)
The baud rate index value sets the baud rate. A power-down power-up cycle is
required when changing the baud rate.
7.3.7 kGetConfig (frame ID 7
d
)
This frame queries the module for the current internal configuration value. The payload
contains the configuration ID requested.
Config ID
UInt8
Payload