VL6180 datasheet(16/73 Pages) STMICROELECTRONICS

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Functional description

VL6180

16/73

DocID024986 Rev 14

2.5

Operating modes

The VL6180 device can operate in 2 different range modes:

Single-shot measurement or Continuous measurement.

From these 2 device modes, the VL6180 API enables 3 different typical operating modes:

Polling, interrupt or asynchronous.

Note:

Wrap Around Filter is not available in Continuous measurement mode.

2.5.1

Polling mode - single shot measurement

Host calls a blocking API function that requests a single shot measurement and waits for the

result. CPU is blocked during ranging.

Table 5. VL6180 operating modes

API

operating

mode

Description

API functions

VL6180

mode

Comments

Polling

Host requests single

shot measurement

and waits for the

result

VL6180x_RangePollMeasurement

Single shot

Recommended for first

API porting or debug

Interrupt

Ranging results are

retrieved from

interrupts

VL6180x_RangeSetInterMeasPeriod

VL6180x_SetupGPIO1

VL6180x_RangeConfigInterrupt

(VL6180x_RangeSetThreshold)

VL6180x_RangeStartContinuousMode

VL6180x_RangeGetMeasurement

VL6180x_ClearAllInterrupt

Continuous

Recommended for User

Detection applications

where CPU is

interrupted by VL6180

so can be asleep when

no target is detected

(power saving)

Asynchro



nous

Host requests a

single shot

measurement and

regularly checks to

see if result is ready

or not

VL6180x_RangeStartSingleShot

VL6180x_RangeGetMeasurement



IfReady

Single shot

Recommended for AF-

Assist applications,

Android OS-based

system where CPU is

synchronized by

EOF/SOF from camera

or by a timer so that top

application controls

measurement periods

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