Leddartech Leddarsteer User manual

LeddarSteer™

DBSD Evaluation Board

USER GUIDE

TF ID 033130

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The information contained herein is the property of the Company and shall not be reproduced in whole or in

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Leddar, LeddarTech, LeddarSteer, LeddarEngine, LeddarVision, LeddarSP, LeddarCore, VAYADrive,

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Please contact a LeddarTech sales representative if you have any questions regarding the information

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visit LeddarTech’s website. We also highly recommend that you read our Standard Sales Terms and

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www.leddartech.com, section “Resources.”

Leddar™ Configurator software: this software is based in part on the work of the Independent JPEG Group.

Keep this User Guide for future reference.

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LeddarTech®shall not be liable for any errors or omissions herein or for any damages arising out of or related

to this document or the information contained herein, even if LeddarTech has been advised of the possibility

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Descriptions of products, including, but not limited to, specifications and drawings, and other related

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LeddarTech has made every effort to ensure that the information contained in the documentation

accompanying its products, including, without limitation, its Specification Sheet, is accurate. However,

LeddarTech will not be liable for any errors or omissions therein and reserves the right to modify the design

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Q100). Customer agrees that it has the necessary expertise to select the product with the appropriate

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customer is solely responsible for compliance with all legal and regulatory requirements in connection with

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used for an application for which it is not suited. LeddarTech’s products are not recommended or authorized

for safety, life support, medical applications, applications involving hazardous, corrosive, or radioactive

substances, or for any use or application in which the failure of a component could cause personal injury,

loss of life, or substantial harm to the environment or property. Where LeddarTech specifically promotes

products as facilitating functional safety or as compliant with functional safety standards, such products are

intended to help enable customers to design and create their own applications that meet applicable functional

safety standards and requirements. Using products in an application does not by itself establish any safety

features in the application.

Any technical advice provided by LeddarTech with reference to the use of its products is given without

assumption by LeddarTech of any liability, and LeddarTech assumes no obligation or liability for the advice

given or results obtained, all such advice being given and accepted at customer’s sole risk.

LeddarTech reserves the right to modify its products at any time, without notice, at its sole discretion. The

products’ performance specifications and operating parameters are determined in an independent state and

are not guaranteed to perform the same way if installed in a customer product.

NOTICE

This device is intended for evaluation under laboratory conditions. It has not been tested against vibration or

shocks.

 
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Table of Contents 
DEFINITIONS .................................................................................................................................. 11 
DBSD STARTER KIT OVERVIEW ................................................................................................. 12 
1. INTENDED USE AND DESCRIPTION.................................................................................................... 12 
2. PACKAGE CONTENTS ...................................................................................................................... 12 
3. SOFTWARE REQUIREMENTS ............................................................................................................ 13 
4. OPTICAL TEST EQUIPMENT REQUIREMENTS ..................................................................................... 13 
DBSD REFERENCE INFORMATION ............................................................................................. 13 
1. INTRODUCTION TO DBSD................................................................................................................ 13 
2. ANGULAR DEFLECTION.................................................................................................................... 14 
3. QUARTER-WAVE PLATE .................................................................................................................. 14 
4. VOLTAGE WAVEFORM CONTROL...................................................................................................... 14 
5. TRANSITION TIME............................................................................................................................ 15 
6. ITO HEATER................................................................................................................................... 16 
7. OVERDRIVE .................................................................................................................................... 16 
LABEL EXPLANATION AND SAFETY INFORMATION ............................................................... 17 
1. DBSD LABEL.................................................................................................................................. 17 
2. LEDDARSTEER EVALUATION BOARD LABEL ...................................................................................... 17 
3. REGULATORY COMPLIANCE ............................................................................................................. 17 
DIGITAL BEAM STEERING DEVICE SPECIFICATIONS.............................................................. 18 
1. MECHANICAL SPECIFICATIONS......................................................................................................... 18 
2. MAIN SPECIFICATIONS..................................................................................................................... 19 
3. HIGH-LEVEL IMPLEMENTATION......................................................................................................... 19 
4. INTERFACES ................................................................................................................................... 19 
4.1. Interface and Connectors ...................................................................................................... 19 
4.2. Liquid Crystal Cell Control and Temperature Acquisition (P1).............................................. 20 
4.3. DBSD Heating (P3) ............................................................................................................... 20 
LEDDARSTEER EVB SPECIFICATIONS ...................................................................................... 22 
1. MECHANICAL SPECIFICATIONS......................................................................................................... 22 
2. MAIN SPECIFICATIONS..................................................................................................................... 23 
3. HIGH-LEVEL IMPLEMENTATION......................................................................................................... 23 
4. BLOCK DIAGRAMS........................................................................................................................... 24 
5. ENVIRONMENTAL SPECIFICATIONS ................................................................................................... 26 
6. INTERFACES ................................................................................................................................... 26 
6.1. Main Power Input (P1)........................................................................................................... 27 
6.2. Liquid Crystal Cell Control and Temperature Acquisition (P3).............................................. 27 

 
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6.3. DBSD Heating (P2) ............................................................................................................... 28 
6.4. Auxiliary DBSD Heating Input (P7)........................................................................................ 28 
6.5. Universal Serial Bus (J1)....................................................................................................... 28 
6.6. LCA3 Evaluation Board Interface (P4) .................................................................................. 29 
6.7. Visual Status (Green & Red LEDs) ....................................................................................... 29 
6.8. Microswitch (S1) .................................................................................................................... 29 
6.9. JTAG Interface (P6) .............................................................................................................. 29 
HARDWARE AND SOFTWARE SETUP ........................................................................................ 30 
1. INSTALLING THE SOFTWARE............................................................................................................. 30 
2. CONNECTING THE DBSD TO THE DRIVER BOARD ............................................................................. 30 
2.1. Liquid Crystal and Temperature Acquisition ......................................................................... 30 
2.2. Heater.................................................................................................................................... 31 
3. CONNECTING THE DRIVER BOARD TO THE COMPUTER (UNIVERSAL SERIAL BUS)............................... 31 
4. POWERING THE DRIVER BOARD....................................................................................................... 32 
5. FIRMWARE UPDATE......................................................................................................................... 33 
OPERATING MODES ..................................................................................................................... 35 
1. STAND-ALONE MODE ...................................................................................................................... 35 
2. SLAVE MODE .................................................................................................................................. 36 
2.1. Slave Mode 1 (HW Trigger)................................................................................................... 36 
2.2. Slave Mode 2 (HW Trigger + SPI)......................................................................................... 36 
FIRST MEASUREMENTS............................................................................................................... 37 
1. POWER SUPPLIES ........................................................................................................................... 37 
2. DRIVING LIQUID CRYSTAL CELLS ..................................................................................................... 37 
3. DRIVING ITO HEATERS ................................................................................................................... 37 
4. MACROS......................................................................................................................................... 38 
INTERFACING WITH THE LCA3 EVALUATION BOARD............................................................. 38 
OPTICAL SETUP EXAMPLES ....................................................................................................... 39 
1. DBSD CALIBRATION ....................................................................................................................... 39 
1.1. First 7 Cells............................................................................................................................ 39 
1.2. 8th Cell ................................................................................................................................... 41 
2. OPTICAL EFFICIENCY ...................................................................................................................... 42 
3. TRANSITION TIME............................................................................................................................ 44 
SOFTWARE SYNTAX..................................................................................................................... 46 
TROUBLESHOOTING .................................................................................................................... 49 
MAINTENANCE .............................................................................................................................. 49 
DISPOSAL....................................................................................................................................... 49 
TECHNICAL SUPPORT.................................................................................................................. 49 

 
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Table of Figures 
Fig. 1: DBSD optical stack (conceptual view) ............................................................................................... 13 
Fig. 2: Single-waveform example.................................................................................................................. 15 
Fig. 3: Relaxation time vs. temperature ........................................................................................................ 16 
Fig. 4: Overdrive waveform, from high to low voltage................................................................................... 16 
Fig. 5: DBSD front and side views ................................................................................................................ 18 
Fig. 6: DBSD isometric view.......................................................................................................................... 18 
Fig. 7: DBSD high-level implementation diagram ......................................................................................... 19 
Fig. 8: DBSD electronic interface .................................................................................................................. 19 
Fig. 9: LeddarSteer EVB front and side views .............................................................................................. 22 
Fig. 10: LeddarSteer EVB isometric view ..................................................................................................... 22 
Fig. 11: LeddarSteer EVB high-level implementation diagram ..................................................................... 23 
Fig. 12: LeddarSteer EVB logical block diagram .......................................................................................... 24 
Fig. 13: LeddarSteer EVB power block diagram........................................................................................... 25 
Fig. 14: LeddarSteer EVB electronic interface.............................................................................................. 26 
Fig. 15: Connector P3 inserted into the driver board .................................................................................... 30 
Fig. 16: Connector P2 inserted into the driver board .................................................................................... 31 
Fig. 17: USB cable inserted into the driver board ......................................................................................... 31 
Fig. 18: Connector P1 inserted into the driver board .................................................................................... 32 
Fig. 19: DIP switch S1-3 in position for firmware update .............................................................................. 33 
Fig. 20: State and transition –Stand-alone mode ........................................................................................ 35 
Fig. 21: State and transition –Slave mode 1 ................................................................................................ 36 
Fig. 22: Flat flexible cable properly oriented ................................................................................................. 38 
Fig. 23: Flat flexible cable properly inserted ................................................................................................. 38 
Fig. 24: LeddarTech’s current optical setup for calibrating the first 7 cells (conceptual view)...................... 39 
Fig. 25: LeddarTech’s current optical setup for calibrating the 8th cell (conceptual view) ............................ 41 
Fig. 26: LeddarTech’s current optical setup for optical efficiency (conceptual view).................................... 42 
Fig. 27: DBSD efficiency vs. angle................................................................................................................ 43 
Fig. 28: LeddarTech’s current optical setup for transition time (conceptual view) ........................................ 44 
 

 
8 | 50 © 2021 LeddarTech Inc. 
List of Tables 
Table 1: Definitions ....................................................................................................................................... 11 
Table 8: Package contents (STARTERKIT-DBSD-120-24-A1) .................................................................... 12 
Table 9: Software requirements .................................................................................................................... 13 
Table 10: Optical test equipment requirements ............................................................................................ 13 
Table 2: DBSD base parameters .................................................................................................................. 14 
Table 3: QWP base parameters ................................................................................................................... 14 
Table 4: Waveform parameters .................................................................................................................... 15 
Table 5: ITO heater resistance...................................................................................................................... 16 
Table 6: DBSD identification label ................................................................................................................ 17 
Table 7: LeddarSteer Evaluation Board identification label .......................................................................... 17 
Table 11: DBSD main specifications............................................................................................................. 19 
Table 12: P1 pinout –Liquid crystal cell control and temperature acquisition.............................................. 20 
Table 13: P3 pinout –DBSD heating ............................................................................................................ 20 
Table 14: LeddarSteer EVB main specifications........................................................................................... 23 
Table 15: Environmental specifications ........................................................................................................ 26 
Table 16: P1 pinout –Main power input ....................................................................................................... 27 
Table 17: P3 pinout –Liquid crystal cell control and temperature acquisition.............................................. 27 
Table 18: P2 pinout –DBSD heating ............................................................................................................ 28 
Table 19: J1 pinout –Universal serial bus .................................................................................................... 28 
Table 20: P4 pinout –LCA3 EVB interface................................................................................................... 29 
Table 21: Visual status LEDs ........................................................................................................................ 29 
Table 22: Microswitch ................................................................................................................................... 29 
Table 23: Operating Modes........................................................................................................................... 35 
Table 24: Optical setup legend, first 7 cells .................................................................................................. 39 
Table 25: Tile ID by azimuthal and elevation angle (degrees)...................................................................... 40 
Table 26: Optical setup legend, 8th cell......................................................................................................... 41 
Table 27: Optical setup legend, optical efficiency......................................................................................... 42 
Table 28: Optical setup legend, transition time............................................................................................. 44 
Table 29: Expected rise time from 10% to 90% for each transition type ...................................................... 45 
Table 30: Software syntax............................................................................................................................. 46 
 