LabVIEW IMAQ: How to release a one-shot cushion of space

Hello

We use IMAQ version 14.5.0.

We have management problems of the buffer that IMAQ uses to store acquired images.

We are releasing a device of linear scan at very high speeds (~ 145 000 lines per second) using an external clock sent via the RTSI cable pulse.

In our LabVIEW program, we set up a list of ~ 200-element buffer and set the parameter of "Continuous?" to "One-shot", so that pads spaces will successively be filled by the camera and no data is lost. (We can't use "Continuous" or else the data is lost)

Then, we enter into a software loop where each iteration:

1. the device receives impulses clock ~ 200 to align the images ~ 200 (lines) to fill the list of buffers.

2. the computer retrieves images buffer ~ 200 sequentially and records the data elsewhere.

So we want to be able to fill repetitive the same list of buffer. The problem is, after the first iteration of the loop, "One-shot" buffer spaces are filled and may not be disclosed to the following iterations. So we end up 'extract' the images first ~ 200 over and over again, which of course is not useful.

We tried to release buffer using "Extract IMAQ buffer VI" spaces, by entering "-1"to "stamp out"." But nothing helped.

We looked at using "IMAQ dispose" of completely destroy the images and clear memory space buffer, then using "IMAQ Create" to make fresh buffer space memory. But we will have to do in each iteration of the loop - this is not practical, because we want to use the capabilities of the camera's high-speed.

Is there a method to "erase" a space of "One-shot" buffer for subsequent iterations?

A test version of our code is attached. Sync_Camera_v3 is the main VI.

I deeply appreciate someone has suggestions to our situation! Thank you.


Tags: NI Software

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