Hi,

I am using a Kria kv260 setup with an imx636 camera, and I am visualizing the active marker with the /opt/metavision/embedded_active_marker_3d_tracking app. 

Marker position is smoothly displays on the screen, proof that signal from sensor is correctly going through the FPGA blocks (PL side) till the ARM processor (PS side).

To analyse the incoming data, I add some monitoring (ILA) on the EventStreamSmart module output and I capture signals tlast, tvalid, tdata and tkeep. Capture is realised with a condition on the tvalid signal to catch only valid data.

With the resulting signal capture, I succeed in extracting information as described in the EVT2.1 format description (https://docs.prophesee.ai/stable/data/encoding_formats/evt21.html#chapter-data-encoding-formats-evt21). 

The problem is that I never catch the event EVT_NEG! The 4 MSB are never "0000". I find EVT_POS, EVT_TIME_HIGH, OTHERS, but never EVT_NEG.

.csv from ILA, ILA view and decoded data are joined to this message.

How is it possible?

Many thanks.

BR.

Guillaume