FLIR Lepton 1.6 - Figure 20 - Generic Vospi Packet

FLIR LEPTON® Engineering Datasheet
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
Lepton Engineering Datasheet, Document Number: 500-0659-00-09 Rev: 203
47
• VoSPI Frame: A VoSPI frame is defined as a continuous sequence of VoSPI packets consisting of a full
frame's worth of pixel data.
• VoSPI Stream: A VoSPI stream is defined as a continuous sequence of VoSPI frames.
As summarized in Table 10, the packet length and number of packets per frame vary depending upon two
runtime user selections, telemetry mode and bit resolution.
Telemetry mode:
• Telemetry disabled (default)
• Telemetry enabled
Video Format mode:
• Raw14 (default)
• RGB888
Table 10 - Packet Length and Number of Video Packets per Frame as a Function of User Settings
Video Format Mode
Telemetry Mode
Telemetry Disabled
Telemetry Enabled
Raw14
Packet length: 164 bytes
Video packets per frame: 60
Packet length: 164 bytes
Video packets per frame: 63
RGB888
Packet length: 244 bytes
Video packets per frame: 60
N/A
4.2.2.1 VoSPI Packets
As depicted in Figure 20, each packet contains a 4-byte header followed by either a 160-byte or 240-byte
payload. Note: because the payload size differs between video formats, the setting should be selected before
VoSPI synchronization is established. If the setting is changed while VoSPI is active, it is necessary to re-
synchronize (see VoSPI Stream, page 50).
Figure 20 - Generic VoSPI Packet
ID
CRC
Payload