AN4545 datasheet(7/27 Pages) STMICROELECTRONICS

7 / 27 page

DocID026571 Rev 1

7/27

AN4545

Performing range measurements

2.1

Performing a range measurement in single-shot mode

Check device is ready to start a range measurement. (Optional)

Check bit 0 of RESULT__RANGE_STATUS {0x4d} is set.

Start a range measurement.

Write 0x01 to SYSRANGE__START {0x18}.

Wait for range measurement to complete.

Poll RESULT__INTERRUPT_STATUS_GPIO {0x4f} register till bit 2 is set to 1.

(New Sample Ready threshold event).

Reading range result.

Read RESULT__RANGE_VAL {0x62}.

This is the range measurement between the VL6180X and target in mm

Clear the Interrupt status.

Write 0x07 to SYSTEM__INTERRUPT_CLEAR {0x15}.

Repeat the previous steps 1 to 4 for more range measurements.

2.2

Performing a range measurement in continuous mode

Check device is ready to start range measurement. (Optional)

Check bit 0 of RESULT__RANGE_STATUS {0x4d} is set.

Start range measurements.

Write 0x03 to SYSRANGE__START {0x18}.

Wait for range measurement to complete.

Poll RESULT__INTERRUPT_STATUS_GPIO {0x4f} register till bit 2 is set to 1.

(New Sample Ready threshold event).

Reading range result.

Read RESULT__RANGE_VAL {0x62}.

This is the range measurement between the VL6180X and target in mm.

Clear the Interrupt status.

Write 0x07 to SYSTEM__INTERRUPT_CLEAR {0x15}.

Repeat the steps 2 to 4 for more range measurements.

Stop range measurements.

Write 0x01 to SYSRANGE__START {0x18}.

AN4545 Datasheet(PDF) 7 Page - STMicroelectronics