Motorola RD5000, Integrator Manual

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Appendix B Motion Sensor Parameters
Introduction
The Motion/Proximity sensor API for the RD5000 includes a MPS_CMD_MOTION_SET_THRESHOLD command
that allowed the setting of an acceleration threshold used to determine whether a motion event had occurred.
Modifications to the motion sensing algorithm have made it desirable to allow the reconfiguration of several
parameters to optimize the code for different environments and this has been implemented using an extension of
this single API call.
API Calls
The API call has been extended using an indexing scheme that dedicates the 3 most significant bits of the 1st
16-bit data word as a parameter identifier. There are currently four parameter sets that may be set using this call.
All parameter values default to values specified in
motion.h , an include file that forms part of the program source
code. Table B-1 to Table B-5 show the programming values required in each case and the defaults that apply.
Since in each case only 13 bits remain for specification of a numeric value, values are restricted to unsigned values
in the range 0-8191.
D is used to designate the do not care bits.
Table B-1
Set Minimum Detectable Velocity Change
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Wd1 0 0 0 X value expressed as 100 * value in ft/sec. (Default is 0.2 ft/sec.)
Wd2 D D D Y value expressed as 100 * value in ft/sec. (Default is 0.2 ft/sec.)
Wd3 D D D Z value expressed as 100 * value in ft/sec. (Default is 0.2 ft/sec.)