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CEVA BNO085 - References

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February 2023 Document 1000-4045 -- Revision 1.3
www.ceva-dsp.com © 2023 CEVA, Inc. All rights reserved 4 / 5
2
Command
0x03
Tare Command
3
P0 (Subcommand)
0x00
Tare Now
4
P1 (Bitmap of Axes)
0x04
Tare ONLY on Z-
axis
5
P2 (Rotation Vector basis)
0x00
Rotation Vector
6-11
Reserved
0x00
Reserved
4. After running this setting, the outputs of the Rotation Vector will be reoriented to this
new forward direction. This setting will revert to the Sensor Orientation FRS config
record (that was set via the last Persist Tare command) the next time the device is
rebooted
How to Apply Tare Changes to Multiple Devices At Production
It is likely that when using the BNO085/BNO086 on a production device, the orientation of the
sensor will be the same on many units. Rather than taring each individual unit, you can apply the Tare
settings to any number of additional units by using the FRS Sensor Orientation configuration record.
General steps for this are listed below. For further information about reading/writing FRS records
contact Hillcrest labs.
1. Run the full Tare procedure listed above (labeled as First Time Setup) on a “reference” device
2. Read the Sensor Orientation FRS record from the reference device
3. Copy this FRS record to each device’s Sensor Orientation FRS record
4. Now these devices will have identical Tare settings on the next hub reset
References
1. 1000-3625 SH-2 Reference Manual, Hillcrest Labs