we use the TX2-NX board on Version 32.7.2
we use the camera ISX019,10fps, Due to hardware reasons, when we use the trigger signal, there will be a loss of 5 frames
Hi Jerry
Yes , it is a external trigger,
This is a synchronization signal. If there is an inaccurate signal, the camera signal will lose 3-5 frames and then go back to normal. The loss of 3-5 frames is acceptable, but occasionally there may be situations where the image cannot be obtained at the normal frame rate (10fps). We cannot understand this. I tried to modify the timeout of channal in vi4 fops, but this problem still seems to exist, Just didn’t report an error
camera device is now passive, and waiting for triggers for sending frames.
timeout from low-level driver side has reported, it means VI cannot receive a frame.
there’ll be no frames as long as not sending trigger, so, this should be an issue on external trigger side.
This is not a problem with external signals. We can capture the normal mipi signal, which is determined to be a 10fps signal, but v4l2 can only capture about half of frame
But I don’t perform any register operations, and just restart the video(This process does not operate on any registers), and the image can be displayed normally
let me have clarification.
VI driver it uses sync-point. (i.e. syncpt) to communicate with sensor streaming.
it’s below code snippet to wait for PXL_SOF syncpt, it should receive start-of-frame for every 100ms since it’s a 10-fps sensor.