User manual

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsPCB design board

JP1

VDD

DRV2605

IN/TRIG

GND

OUT+

OUT-

MSP430

PWM/

GPIO

P3.1

EN PWM

SDA

SCL

SDA

SCL

C11

AUDIO

R40, 0Q

R41, NP

SDA SCL

R43, 0Q

Hardware Configuration

www.ti.com

4.7 Audio-to-Haptics Input

Figure 21. Audio-to-Haptics Input

The DRV2605 audio-to-haptics feature converts an audio signal to a corresponding haptics waveform.

This can be used to simulate bass in music, or use the audio track of a game to produce haptic effects.

To use audio-to-haptics:

1. Apply an analog line-out audio signal (not PWM) to the AUDIO jack on the left side of the board. The

tip of the inserted male audio plug is applied to the IN/TRIG pin of the DRV2605. See Figure 21.

NOTE: To get the best performance using a headphone out, the user may need to adjust the

volume, so that the input signal is near, but does not exceed 1.8 V

peak

2. In demo mode, select mode 0 (00001’b) using the increment mode button (“+”).

3. In mode 0, press either button B1 or B2 to enable the DRV2605 audio-to-haptics. Buttons B3 and B4

switch to internal trigger mode, play a ROM library effect, and then switch back to audio-to-haptics

mode.

• B1 – Audio-to-haptics using ERM

• B2 – Audio-to-haptics using LRA

• B3 – Switch to internal trigger and play library click effect

• B4 – Switch to internal trigger and play library buzz effect

4. Play music and feel the vibrations of the actuator.

NOTE: Some audio signals are too large or too small and the volume must be adjusted. Adjust

appropriately so that the maximum input voltage is 1.8 V and the bass of the input signal can

be felt on the actuator. The audio input minimum and maximum thresholds can be adjusted

using I

C. See the datasheet for more details.

DRV2605EVM-CT ERM and LRA Haptic Driver Evaluation Kit SLOU348B–January 2013–Revised March 2014

Submit Documentation Feedback