Accelerometer Demonstration
MC1322x SMAC Demonstration Application User’s Guide, Rev. 1.3
4-6
Freescale Semiconductor
4.7
Setting Up the Calibration Application
In order to verify and visualize the calibration procedure, the
Triax.exe
PC GUI must be running, but it is
not required.
1. Press the Reset button on the PC_Radio Board once. (Out of reset, the PC application is running.)
2. Press the Reset button on the Accelerometer Board once.
3. Place the Accelerometer Board on a flat surface. (component side up)
4. Press SW1 on the Accelerometer Board to advance the application to the Accelerometer Mode
(Application Two). LED3 momentarily lights to indicate that Application Two is running. The
Accelerometer Board sends out a ping packet every two (2) seconds and updates the data on the
XYZ Demo PC application each time the board is moved.
5. If the data points for the X, Y, and Z axes shown on the PC GUI are not near the origin of the graph,
then continue to
Step 6
.
6. Press SW4 on the Accelerometer Board once until all LEDs are lit. This shows that the calibration
is being performed.
7. Verify that the Accelerometer Board is calibrated by viewing the X, Y, and Z axes on the PC GUI.
The squares on the display should be approximately at axis point 0,0. If the calibration is still
incorrect, repeat the calibration process until the data points are nominally at axis point 0,0.
8. To quit, exit the application in the GUI and press reset on both boards. Press SW1 on the
Accelerometer Board once to return to main application functionality.