Pulse signal stopping problem during master-slave camera synchronization

Pulse signal stopping problem during master-slave camera synchronization

Hello, I would like to ask you about the stop pulse signal:

experiment procedure:
1. First synchronization: After compiling SDK: metavision_hal_sync, start the slave first and then the host. There is no problem with synchronization.
Note: The USB data cable is still connected to the computer at this time.

2. When synchronizing for the second time, start the slave camera first. At this time, the slave machine already has a picture (the master machine has not yet issued a synchronization command). If the pulse signal is interrupted after unplugging the USB data cable of the main camera at this time, please execute the command again. When the master camera starts, the slave camera also has images.

Question: Determine why the pulse signal still exists as long as the main camera is not unplugged from the computer USB port.
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