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From: Bernhard Englitz on 27 Apr 2010 16:35
Hi,

I am trying to continuously acquire analog data using the Data Acquisition Toolbox (2.15) under Windows 7 (32-bit) after a 'HwDigital' Trigger is provided to one of the digital inputs of a NI 6254 DAQ card (M-Series).
To this end, I set SamplesPerTrigger to 'inf'. In contrast to the case of a 'Manual' or 'Immediate' Trigger, where everything runs fine, the NIDAQmx driver seems to try to allocate the required memory upfront which thus leads to an error, since the amount of memory is not available (this error occurs during the execution of Matlab's start command):

NIDAQmx error : NI Plattform Services: The requested Memory could not be allocated. Tast Name: MWDAT2552 Status Code: -50352

From the documentation of the NIDAQmx driver it seems, that it should support a Ring-Buffer for continuous acquisition. Can it be activated? Or is there anything else I am missing?

Insightful advice would be very much appreciated!

Thanks,

Bernhard
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