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2.2
Description of the Demo Modes
The following sections describe each demo mode in more detail.
2.2.1
Mode Off – Haptics Effect Sequences
Mode Off is a set of haptic sequences that combine a series of haptic effects. The two effects below show
combinations of clicks and ramps.
Figure 3. ERM Click and Bounce
Waveform (Button 1)
2.2.2
Mode 4 – ERM Clicks
Mode 4 shows the difference in open-loop and closed-loop ERM clicks. In closed-loop the driver
automatically overdrives and brakes the actuator. In open-loop, the waveform must be predefined with
overdrive and braking. The image on the left shows a closed-loop waveform and the image on the right
shows the same input waveform without closed-loop feedback enabled.
Figure 5. ERM Closed-Loop Click Waveform (Button 1) Figure 6. ERM Open-Loop Click Waveform (Button 4)
SLOU355 – March 2013
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Copyright © 2013, Texas Instruments Incorporated
DRV2604 Demonstration Program
Figure 4. LRA Ramp-Up and Click
Waveform (Button 2)
DRV2604 ERM, LRA Haptic Driver Evaluation Kit
7
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