Many of our target customers deploy computers in harsh environments where ESD (electrostatic discharge) can disrupt camera streaming. The NPL54’s auto recovery mechanism is designed to restore the GMSL2 protocol when a camera connection is lost due to ESD.
The auto recovery process includes:
On power-up, PCIe-NPL54 recognize the currently connected GMSL2 ports as the baseline — e.g., ports 0, 1, and 2 are connected, while port 3 is not.
If a camera signal is lost, PCIe-NPL54 initiates auto recovery to re-establish the GMSL2 link. Each attempt takes approximately 15 seconds and continues for 60~70 seconds to reflect the updated connection state — e.g., ports 0 and 1 remain connected, while ports 2 and 3 are not.
Examples of Auto Recovery Behavior:
Case 1: Temporary Disconnection
If a camera is temporarily disconnected, video streaming should recover within 20 seconds.
Case 2: Permanent Disconnection
If a camera is permanently disconnected (e.g., due to shock or manual removal), streaming should recover in about 60–70 seconds.
Case 3: Adding Cameras After Camera Streaming
PCIe-NPL54 is designed for fixed camera configurations during operation. To initialize newly connected cameras, please perform a full power cycle.