8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 124
When using the event feature, you need to enable the corresponding event firstly and set the port of the
event channel, the timeout of the event retransmission, and the number of times the event retransmission
to the camera. When the retransmission timeout of the event is set to 0, the event sent by the camera will
not require the host to return the reply packet. When the port value of the event channel is set to 0, the
camera will not send the event to the host. In other cases, the camera needs to receive a host reply packet
before sending the next event. When the event that the camera sends does not receive the reply packet,
the camera will retransmit the event according to the retransmission timeout and retransmission times.
The effective information contained in each event is shown in Table 8-4:
No.
Event Type
Information
1
ExposureEnd Event
Event ID
Frame ID
Timestamp
2
BlockDiscard Event
Event ID
Timestamp
3
EventOverrun Event
Event ID
Timestamp
4
FrameStartOvertrigger Event
Event ID
Timestamp
5
BlockNotEmpty Event
Event ID
Timestamp
6
FrameBurstStartOvertrigger Event
Event ID
Frame ID
Timestamp
7
FrameStartWait Event
Event ID
Timestamp
8
FrameBurstStartWait Event
Event ID
Timestamp
Table 8-4 The effective information of each event
Among them: the timestamp is the time when the event occurs, and the timer starts when the camera is
powered on or reset. The bit width of the timestamp is 64bits, and the unit is ns.
