Continuous sampling of unbuffered ports

[thehun]

Hi,

I'm trying to use a USB6356 device to sample a set of digital signals continuously (until the user presses a stop button) but when creating the task I get a warning that say ports 1 and 2 don't support buffered operation. I guess this means that I can only acquire a predefined number of samples.

I have thought of creating a loop with feedback nodes and this way retrieve one sample at a time from each channel and save these samples in an array but here I face the problem of timing, as the smallest delay I can set for the loop is 1ms (so the largest sampling rate would be 1KHz). 

Any ideas about how I can overcome this?

Cheers

[Dennis_Knutson · Accepted solution]

The device has only 8 pins that are hardware timed (port 0) and with software timed acquisition, the MAX rate is around 1kHz. You should get a better card if you need higher rates for that many pins.

[thehun]

Thanks, I guess I will either need to reduce the number of signals and send them all to port 0 or get a new card.