ST VL53L1X API Manuale
VL53L1X Setup and Demo
Apr 2018
Agenda
•VL53L1X OverView
•VL53L1X Software package
•Presence HOD demo
2
VL53L1X OverView
VL53L1X eco-system 4
VL53L1X : Miniature ToF Ranging
VL53L1X C API package –STSW-IMG007
Discover API Source code
VL53L1X Eval GUI - STSW-IMG008
Get ranging live curves on your PC
Change key settings of the device
Data logging capabilities
X-CUBE-53L1A1 package
Full integration in STM32 MCU (real-time)
All source code provided
Full access to product settings
Data logging capabilities
Ranging and Gesture detection demo
Hardware
P-NUCLEO-53L1A1
X-NUCLEO-53L1A1
VL53L1X GUI
User Manual VL53L1X X-CUBE
User Manual
Documentation
VL53L1X Data Brief
VL53L1X Datasheet
VL53L0X Quick Start Guide
Applications Notes
VL53L1X API Data Brief
VL53L1X API User Manual
X-NUCLEO-53L1A1 HW
User Manual
Hardware Description 5
•VL53L1X Evaluation tools are all based on the same hardware pack composed of
oNucleo F401RE board
oX-NUCLEO-53L1A1 Nucleo Expansion board
oOptional two VL53L1X satellites
oSeveral gap spacers and cover glass
Search for P-NUCLEO-53L1A1 on st.com to order the pack and get documentation
VL53L1X Application
•Advanced user detection
Ultra-low-power
Laptop, PC, tablets & IoT, portable handsets.
•Drones and Robotic
Take-off and landing phase
Obstacle avoidance
Ceiling detection
•Smart building and smart lighting
People detection, gesture control
•Sanitary
Robust user detection
•Smart shelves and vending machines
Goods inventory monitoring
6
VL53L1X Mode
•Autonomous mode is using sigma delta mechanism to measure distance:
Averages all targets in the full FoV
Allows multiple ROI
This mode is called Timed measurement, means ranging continuously and autonomously with a
programmable inter-measurement period.
7
Note: Inter measurement period is start ranging1 to ranging2. Inter measurement timing is in b/w one
ranging result to another.
Autonomous functionalities
•Autonomous ranging with selectable timing
budget from 20ms to 1000ms.
•In short distance, minimum timing budget is
20ms.
•Ideally, for all distance modes, minimum
timing budget is 33ms.
•If the inter-measurement timing is shorter
than the timing budget, once the device
completes the ranging, the next ranging
starts immediately.
8
Timing budget Ranging characteristics (tbc)
•VL53L1X running in low power autonomous mode,
no data sharing through I2C, just GPIO level change if
human / object is detected.
•4 detection thresholds criteria :
•Above High
•Below Low
•In Window (<=High AND >=Low)
•Out of Window (>High OR <Low)
•No target ( Interrupt is generated when no
target is present.)
Key figures
•No I2C data output (low
power mode)
•GPIO1 level changes (INT)
to wake-up the host
•Host can then make
VL53L1 switch to active
mode for full ranging
capabilities
INT
Key figures
•ROI size is possible ( 4x4 to 16x16 spad
array)
Timing Budget
•Timing Budget and Inter measurement budget statically configured as
part of Initialized process.
•It allows user to configure timing budget and Inter measurement budget
by calling sub sequentAPI in Application level.
•For Example : In Init time, let say default timing budget set to 41ms and inter
measurement timing budget set to 500ms.
•If user wants to update with new value then call it by followingAPI subsequently.
•VL53L1_SetMeasurementTimingBudgetMicroSeconds(Dev, 50000); // 50ms
•VL53L1_SetInterMeasurementPeriodMilliSeconds(Dev, 1000); //1sec
9
Software Package
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4
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