PNI FieldForce Trax - Manual (Page 54)

PNI Sensor Corporation DOC#1016505 r06
TRAX User Manual Page 50
kAccelX, kAccelY & kAccelZ (Component IDs 21
d
, 22
d
, 23
d
)
These values represent the accelerometer sensor data for the x, y, and z axis,
respectively. The values are normalized to g (Earth’s gravitational force).
kMagX, kMagY & kMagZ (Component IDs 27
d
, 28
d
, 29
d
)
These values represent the magnetic sensor data for the x, y, and z axis,
respectively. The values are given in µT.
kGyroX, kGyroY, kGyroZ (Component IDs 74
d
, 75
d
, 76
d
)
These values represent the gyroscope sensor data for rotation around the x, y, and
z axis, respectively. The values are in radians per second.
7.5.4 Making a Measurement
kGetData (frame ID 4
d
)
If the TRAX is configured to operate in Polled Acquisition Mode (see
kSetAcqParams), then this frame requests a single measurement data set. The frame
has no payload.
kStartContinuousMode (frame ID 21
d
)
If the TRAX is configured to operate in Continuous Acquisition Mode (see
kSetAcqParams), then this frame initiates the outputting of data at a relatively fixed
data rate, where the data rate is established by the SampleDelay parameter. The
frame has no payload.
kStopContinuousMode (frame ID 22
d
)
This frame commands the TRAX to stop data output when in Continuous Acquisition
Mode. The frame has no payload.
kGetDataResp (frame ID 5
d
)
The response to kGetData and kStartContinuousMode is kGetDataResp. The specific
data fields that will be output (ID 1, Value ID 1, etc.) should have been previously
established by the kSetDataComponents command frame.
Example: If heading and heading status are set to be output per the
kSetDataComponents command, the payload would look like:
ID Count
UInt8
Payload
ID Specific ID Specific ID Specific
Value ID 1 Value ID 2 Value ID 3 ID 1
UInt8
ID 2
UInt8
ID 3
UInt8