PNI CompassPoint V2Xe - Manual (Page 15)

PNI Sensor Corporation DOC#1017814 r01
V2Xe User Manual – May 2012 Page 13
kDeclination (Config. ID 0x01)
This sets the declination angle to determine True North heading. Positive
declination is easterly declination and negative is westerly declination. This is not
applied unless kTrueNorth is set to TRUE.
kTrueNorth (Config. ID 0x02)
Flag to set compass heading output to true north heading by adding the
declination angle to the magnetic north heading.
kCalSampleFreq (Config. ID 0x03)
This sets the sampling frequency during calibration.
kSampleFreq (Config. ID 0x04)
This sets the sampling frequency when damping is enabled. If this is greater than
0 Hz, then the last calculated heading is returned when a heading query command
is received from the host. If kSampleFreq is set to 0 Hz, then X and Y counts are
sampled and the heading calculated after a query is received.
kPeriod (Config. ID 0x05)
This sets the period or number of sensor circuit oscillation cycles (cycle counts) to
be counted while simultaneously using the internal fixed reference clock to
measure the time to obtain this count, as defined in Table 5-3.
Table 5-3: ASIC Period Values
Period Select
Value
Cycle Counts
(1/Period)
1 32
2 64
3 128
4 256
5 512 (default)
6 1024
7 2048
8 4096
kBigEndian (Config. ID 0x06)
Sets the Endianness of packets. TRUE is Big Endian. FALSE is Little Endian.
kDampingSize (Config. ID 0x07)
kDampingSize indicates the number of heading samples to be averaged, and then
returned as the heading reading. When damping is enabled and a value (n = 1 to
8) for the damping range is selected, the V2Xe will perform a simple average of