HMR3300 Datasheet, PDF (7/11 Pages) Honeywell Solid State Electronics Center – Digital Compass Solutions

HMR3200/3300
Roll Axis Re-Zero (HMR3300 only)
*O<cr><lf>
Allows the user to zero the roll output. This command should only be issued when the roll axis is leveled (±0.3°).
Clears Alarm or Warning status after command receipt.
Pitch Axis Re-Zero (HMR3300 only)
*P<cr><lf>
Allows the user to zero the pitch output. This command should only be used when the pitch axis is leveled (±0.3°).
Clears Alarm or Warning status after command receipt.
Averaged Output
*A<cr><lf>
Same result as the query command except that the data are the result of an averaging of 20 readings. The *A
commands are allowed only in Stop data mode. The command response will not occur until the 20 readings
accrue (8 per second for the HMR3300, 15 per second for the HMR3200).
Split Filter Toggle (HMR3300 only)
*F<cr><lf>
This command toggles the split filter bit in the configuration status bytes. The parameter setting is saved in the
EEPROM immediately, but not in shadowed in RAM. Requires power cycling or a reset command (*R) to activate.
A set bit indicates the System Filter only smoothes the accelerometer data (Tilt Filter), and the Magnetic Filter is
now active to smooth magnetic sensor data. A cleared filter bit resumes the same smoothing for both the tilt and
magnetometer data.
Reset
*R<cr><lf>
Resets compass to power-up condition. A one second initialization routine starts and EEPROM data (non-volatile
memory) is uploaded (shadowed) into RAM. Continuous streaming data begins after initialization and status
output.
User Calibration
*C<cr><lf>
The command to be issued to enter and exit the calibration mode. Once in the calibration mode, the device will
send one or more magnetometer data strings appended by a “C” character to indicate the Calibration Mode
operation.
Eg. 123,834,1489,C<cr><lf>
See the calibration procedure notes earlier in this datasheet. At the completion of the calibration movements,
issue another *C<cr><lf> to exit the calibration mode.
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