Time#

Note

Third-party sensors and accessories noted on this page are for illustrative purposes. Please refer to NVIDIA® DRIVE® Hyperion™ 8.1 Sensors and Accessories for supported sensors and accessories.

About This Module#

The Time module provides the ability to start a Time sensor which will enable time synchronization for supported sensors.

Supported Time Sensors#

Please refer to NVIDIA DRIVE Hyperion 8.1 Sensors and Accessories for supported time sensors.

For a list of sensors supporting time synchronization through time sensor, see Sensor Timestamping.

Start Time Sensor#

To create a Time sensor, the DriveWorks module expects the following inputs:

  • nvpps device

  • reference type

  • reference type specific start parameters

  • optional PTP interface from additional network time domain

Supported Reference Types#

Reference Type

Required Parameters

Example

NOVATEL_ETHERNET

ip, port

nvpps-device=/dev/nvpps0,reference-type=NOVATEL_ETHERNET,ip=192.168.0.210,port=2000

NOVATEL_CAN

can-device

nvpps-device=/dev/nvpps0,reference-type=NOVATEL_CAN,can-device=can0

NMEA

gps-serial-device, baud

nvpps-device=/dev/nvpps0,reference-type=NMEA,baud=9600,gps-serial-device=/dev/ttyUSB0

NONE

Note

Time reference type NONE will not log UTC time samples. Sensors dependant on UTC time synchronization will return host timestamps.

Starting Time Synchronization#

To enable time synchronization for supported sensors, simply create and start the time sensor. The HAL will take care of synchronization. There are no further steps to access synchronized timestamps, which will automatically overwrite the original sensor frame/packet timestamps.

Playback from Recordings#

The time module also supports time synchronization during playback using recorded time sensor data.

Relevant Tutorials#

On this page