Datasheet

Freescale Sensor Fusion Library for Kinetis MCUs, Rev. 0.7, 9/2015
Freescale Semiconductor, Inc.
4.6 Computation Metrics
The Sensor Fusion Library computations are measured directly using the Sensor Fusion Toolbox and
the ARM
®
sysTick clock.
4.6.1 Statistics from Build #5.00 of the Sensor Fusion Library
For the current build (5.00), Freescale used the built in sysTick counter to measure each iteration of the
algorithm in units of CPU clock cycles. The customer can repeat the exact same measurement,
because both PC and Android Sensor Fusion Toolboxes display this information in a real-time basis.
The test results will vary depending device movement are presented as “typical” numbers.
Table 10. SysTick Values for Freedom Development Platforms and Sensor Combinations
Freedom Platform Accel 2D Mag Gyro eCompass Accel
+Gyro
9-axis
SysTick Values for CodeWarrior Build 5.00 in kTicks
KL25Z 58 46 172 72 208 740
KL26Z 58 45 171 71 210 740
KL46Z 59 45 171 72 207 740
K20D50M 34 26 63 42 157 509
K64F 3.1 2.86 4.5 3.6 10.6 50.5
KL25Z 58 46 172 72 208 740
SysTick Values for KDS Build 5.00 in kTicks
KL25Z 59 47 174 74 211 840
KL26Z 61 48 173 75 211 860
KL46Z 60 49 174 74 210 840
K20D50M 35 27 66 44 160 580
K64F 3.3 3.1 4.9 3.9 11.4 54.6
K22F 3.9 3.7 5.8 4.4 13.4 59.1