Texas Instruments DRV2605L User manual

User's Guide
SLOU389A–May 2014–Revised June 2014
DRV2605L ERM and LRA Haptic Driver Evaluation Kit
The DRV2605L is a haptic driver designed for linear resonant actuators (LRA) and eccentric rotating mass
(ERM) motors. It provides many features, which help eliminate the design complexities of haptic motor
control including:
• Reduced solution size
• High-efficiency output drive
• Closed-loop motor control
• Quick device startup
• Embedded waveform library
• Auto-resonance frequency tracking
The DRV2605LEVM-CT evaluation module (EVM) is a complete demo and evaluation platform for the
DRV2605L. The kit includes a microcontroller, linear actuator, eccentric rotating mass motor, sample
waveforms, and capacitive touch buttons, which can completely demonstrate and evaluate the DRV2605L.
This user's guide contains instructions to setup and operate the DRV2605LEVM-CT in demonstration and
evaluation mode.
Evaluation Kit Contents:
• DRV2605LEVM-CT demo and evaluation board
• Mini-USB cable
• Demonstration mode firmware
Needed for programming and advanced configuration:
• Code Composer Studio™ (CCS) or IAR Embedded Workbench IDE for MSP430
• MSP430 LaunchPad (MSP-EXP430G2), or MSP430-FET430UIF hardware programming tool
• DRV2605LEVM-CT firmware available on www.ti.com
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Contents
1 Getting Started............................................................................................................... 4
1.1 Evaluation Module Operating Parameters ...................................................................... 5
1.2 Quick Start Board Setup........................................................................................... 5
2 DRV2605L Demonstration Program....................................................................................... 6
2.1 Demo Mode.......................................................................................................... 7
2.2 Description of the Demo Modes .................................................................................. 8
2.3 ROM Library Mode................................................................................................ 13
2.4 ROM Library Effects List ......................................................................................... 14
3 Additional Hardware Modes............................................................................................... 15
3.1 Enter Binary Counting Mode..................................................................................... 15
3.2 Exit Binary Counting Mode....................................................................................... 15
3.3 Binary Counting Modes........................................................................................... 16
4 Hardware Configuration ................................................................................................... 17
4.1 Input and Output Overview ...................................................................................... 17
4.2 Power Supply Selection .......................................................................................... 17
4.3 Using an External Actuator....................................................................................... 18
4.4 PWM Input ......................................................................................................... 19
4.5 External Trigger Control ......................................................................................... 20
4.6 External I2C Input.................................................................................................. 21
4.7 Audio-to-Haptics Input............................................................................................ 22
5 Measurement and Analysis .............................................................................................. 23
6 MSP430 Firmware ......................................................................................................... 24
6.1 MSP430 Pinout.................................................................................................... 25
7 Schematic ................................................................................................................... 26
8 Layout........................................................................................................................ 27
9 Bill of Materials ............................................................................................................. 30
List of Figures
1 Board Diagram............................................................................................................... 4
2 DRV2605LEVM-CT Mode Sets............................................................................................ 6
3 ERM Click and Ramp-Down Waveform (Button 1)...................................................................... 8
4 LRA Ramp-Up and Pulsing Waveform (Button 4)....................................................................... 8
5 ERM SharpClick_100 (Button 1)........................................................................................... 8
6 ERM StrongClick_60 and Release SharpClick_100 (Button 2)........................................................ 8
7 LRA SharpTick2_80 (Button 1) ............................................................................................ 9
8 LRA StrongClick 100 and Release SharpTick2 80 (Button 2) ......................................................... 9
9 LRA Auto-Resonance On (Button 1)...................................................................................... 9
10 LRA Auto-Resonance Off (Button 2)...................................................................................... 9
11 LRA Acceleration versus Frequency over Output Voltage............................................................ 10
12 ERM Closed Loop (Button 3)............................................................................................. 10
13 ERM Open Loop (Button 4)............................................................................................... 10
14 ERM Audio-to-Haptics Conversion (Button 1).......................................................................... 12
15 LRA Audio-to-Haptics Conversion (Button 2)........................................................................... 12
16 Power Jumper Selection .................................................................................................. 18
17 Terminal Block and Test Points .......................................................................................... 18
18 External PWM Input........................................................................................................ 19
19 External Trigger Control................................................................................................... 20
20 External I2C Input........................................................................................................... 21
21 Audio-to-Haptics Input..................................................................................................... 22
22 Terminal Block and Test Points .......................................................................................... 23
23 DRV2605L Unfiltered Waveform ......................................................................................... 23
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24 DRV2605L Filtered Waveform............................................................................................ 23
25 Measuring the DRV2605L Output Signal With an Analog Low-Pass Filter......................................... 23
26 LaunchPad Programmer Connection.................................................................................... 24
27 DRV2605LEVM-CT Schematic........................................................................................... 26
28 X-Ray Top View ............................................................................................................ 27
29 Top Copper ................................................................................................................. 27
30 Layer 2 Copper............................................................................................................. 28
31 Layer 3 Copper............................................................................................................. 28
32 Bottom Copper.............................................................................................................. 29
List of Tables
1 Jumper Descriptions......................................................................................................... 5
2 Mode and Effects Table..................................................................................................... 7
3 DRV2605L Library Table.................................................................................................. 13
4 Binary Counting Modes.................................................................................................... 16
5 Hardware Overview........................................................................................................ 17
6 MSP430 Pinout............................................................................................................. 25
7 Bill of Materials ............................................................................................................. 30
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Actuators
DRV2605L
MSP430
OUT
USB
VBAT
SBW
MSP
DRV
USB Power
External
Power
Power Select Pins
DRV2605L Increment Mode
Decrement Mode ERM and LRA Actuators
Effect Buttons
Press to play haptic effects.
Programmer
Connector
AUDIO
Audio-to-
Haptics
JP4
JP3
Actuator Disconnect
Getting Started www.ti.com
1 Getting Started
The DRV2605L can be used as a demonstration or evaluation tool. When the DRV2605LEVM-CT is
powered on for the first time, a demo application automatically starts. To power the board, connect the
DRV2605LEVM-CT to an available USB port on your computer using the included mini-USB cable. The
demo begins with a board power-up sequence, and then enters the demo effects mode. The four larger
buttons (B1 to B4) can be used to sample haptic effects using both the ERM and LRA motor in the top
right corner. The two smaller mode buttons (“–“ and “+”) are used to change between the different banks
of effects. See the DRV2605L Demonstration Program section for a more detailed description of the demo
application.
Figure 1. Board Diagram
Code Composer Studio is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
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www.ti.com Getting Started
1.1 Evaluation Module Operating Parameters
The following table lists the operating conditions for the DRV2605L on the evaluation module.
Parameter Specification
Supply voltage range 2.5 to 5.5 V
Power-supply current rating 400 mA
1.2 Quick Start Board Setup
The DRV2605LEVM-CT firmware contains haptic waveforms which showcase the features and benefits of
the DRV2605L. Follow the instructions below to begin the demo.
1. Out of the box, the jumpers are set to begin demo mode using USB power. The default jumper settings
can be found in Table 1.
Table 1. Jumper Descriptions
Jumper Default Position Description
JP1 Shorted Connect MSP430 GPIO or PWM output to DRV2605L IN/TRIG
JP2 Shorted 3.3-V reference for I2C
JP3, JP4 Shorted Connect on-board actuators to DRV2605L
MSP USB to MSP Select USB (5 V) or VBAT power for the MSP430
DRV USB to DRV Select USB (5 V) or VBAT power for the DRV2605L
2. Connect the included mini-USB cable to the USB connector on the DRV2605LEVM-CT board.
3. Connect the other end of the USB cable to an available USB port on a computer, USB charger, or USB
battery pack.
4. If the board is powered correctly, the four colored LEDs turn on, four mode LEDs flash, and the LRA
and ERM perform auto-calibration, indicating the board has been successfully initialized.
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Demo Mode ROM Library
Mode
Binary Counting
Mode
+ +
Hold for 3 s Hold for 3 s
Modes
Mode OFF
Mode 4
Mode 3
.
.
Mode 0
Modes*
Mode 0
Mode 1
Mode 2
.
.
Mode 5
.
.
Mode 30
Mode 31 (Library Select)
Modes*
Mode 0
Mode 1
Mode 2
.
.
Mode 9
Mode 10 (Empty)
.
Mode 29 (Empty)
Mode 30
Mode 31
+
++
* Displayed in Binary
DRV2605L Demonstration Program www.ti.com
2 DRV2605L Demonstration Program
The DRV2605LEVM-CT contains a microcontroller and embedded software to control the DRV2605L.
There are three sets of modes accessible by pressing and holding the “+” button. Follow the instructions in
the following sections to access the effects in each set.
Figure 2. DRV2605LEVM-CT Mode Sets
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2.1 Demo Mode
Table 2 lists the effects preloaded on the DRV2605LEVM-CT. The modes are selected using the “+” and
“–“ mode buttons in the center of the board. The current mode can be identified by the white LEDs directly
above the mode buttons. Buttons B1 to B4 trigger the effects listed in the description column and change
based on the selected mode.
Table 2. Mode and Effects Table
Waveform
Mode Button Description Actuator Interface
Location
B1 Click + Ramp Down ERM
B2 Ramp Up + Pulsing
Mode Off ROM Internal trigger (I2C)
LEDs Off B3 Click + Ramp Down LRA
B4 Ramp Up + Pulsing
B1 SharpClick_100 Internal trigger
B2 StrongClick_60 + Release External edge trigger
Mode 4 ERM ROM
LED M4 On B3 SoftBump_100 Internal trigger
B4 DoubleClick_100 External level trigger
B1 SharpTick2_80 Internal trigger
B2 StrongClick_100 + Release External edge trigger
Mode 3 LRA ROM
LED M3 On B3 SoftBump_100 Internal trigger
B4 DoubleClick_100 External level trigger
B1 LRA auto-resonance on RTP
LRA
B2 LRA auto-resonance off µController PWM
Mode 2
LED M2 On B3 ERM buzz alert (closed loop) RTP
ERM
B4 ERM buzz alert (open loop) ROM Internal trigger
B1 Matching Game:
B2
Mode 1 The board gives several waveforms to match. ERM and ROM Internal trigger (I2C)
LED M1 On Must match from a given waveform list each LRA
B3 time before going to the next given waveform.
B4
B1 Audio-to-haptics enable ERM External analog Audio-to-haptics
source
B2 Audio-to-haptics enable LRA
Mode 0
LED M0 On B3 Exit A2H, click, return to A2H ERM and ROM Internal trigger (I2C)
LRA
B4 Exit A2H, buzz, return to A2H
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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 contains a set of haptic sequences that combine a series of haptic effects. The two following
effects show combinations of clicks, ramps, and pulses.
Figure 3. ERM Click and Ramp-Down Waveform Figure 4. LRA Ramp-Up and Pulsing Waveform
(Button 1) (Button 4)
2.2.2 Mode 4 – ERM Clicks
Mode 4 shows two different ERM click styles. Button 1 shoes a single sharp click. Button 2 shows a click
and release effect. The click and release effect provides a haptic waveform on both the button press and
the button release.
Figure 5. ERM SharpClick_100 (Button 1) Figure 6. ERM StrongClick_60 and Release
SharpClick_100 (Button 2)
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2.2.3 Mode 3 – LRA Clicks
Mode 3 shows two different LRA click styles. Button 1 shoes a single sharp click and Button 2 shows a
click and release effect. The click and release effect provides a haptic waveform on both the button press
and the button release.
Figure 7. LRA SharpTick2_80 (Button 1) Figure 8. LRA StrongClick 100 and Release SharpTick2
80 (Button 2)
2.2.4 Mode 2 – Alerts
Mode 2 showcases the advantages of the smart loop architecture, which includes auto-resonance
tracking, automatic overdrive, and automatic braking.
Figure 9 and Figure 10 show the difference in acceleration when using LRA auto-resonance on and LRA
auto-resonance off. Notice that the acceleration is higher when driven at the resonant frequency. Also,
notice the start and stop time of the acceleration are much quicker when using the overdrive and braking
feature of the DRV2605L.
Figure 9. LRA Auto-Resonance On (Button 1) Figure 10. LRA Auto-Resonance Off (Button 2)
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Acceleration (G)
Frequency (Hz)
DRV2605L Demonstration Program www.ti.com
The reason for higher acceleration can be seen in Figure 11. The LRA has a very-narrow operating
frequency range due to the properties of a spring-mass system. Furthermore, the resonance frequency
drifts over various conditions such as temperature and drive voltage (the effects shown in Figure 11). With
the smart loop auto-resonance feature, the DRV2605L dynamically tracks the exact resonant frequency to
maximize the vibration force.
Figure 11. LRA Acceleration versus Frequency over Output Voltage
Figure 12 and Figure 13 show the difference between an ERM with automatic closed-loop overdrive and
braking, and the open-loop library waveform with a predefined overdrive period. The closed-loop version
starts and stops the actuator perfectly and does not drive too long or too short. Automatic overdrive and
braking simplify the design of haptic effects by eliminating the tuning time for actuator startup and stop.
Figure 12. ERM Closed Loop (Button 3) Figure 13. ERM Open Loop (Button 4)
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