simultaneous digital and analog output using data acquisition toolbox

Question

Sarah McIntyre 2015-4-22

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/212809-simultaneous-digital-and-analog-output-using-data-acquisition-toolbox

回答： Sarah McIntyre 2015-4-23

Hello,

I am using a NI-DAQ 6216 with Matlab's Data Acquisition Toolbox. The device has two analog output channels and I need to use both simultaneously to output arbitrary waveforms. At the same time, I want to use a digital output to drive an LED that signals when the analog signals are produced.

I tried to follow this example using the session based interface: http://au.mathworks.com/help/daq/generate-signals-on-both-analog-and-digital-channels.html

s = daq.createSession('ni');
addAnalogOutputChannel(s,'Dev1',0:1,'Voltage')
addDigitalChannel(s,'Dev1','Port0/Line0','OutputOnly')

And I get the message:

Warning: A channel that does not support clocked sampling was added to the session. Clocked operations using startForeground and startBackground will be disabled. Only on-demand operations using inputSingleScan and outputSingleScan can be done.

So I can't use startForeground and startBackground, which I need to produce my analog outputs. Is there any way to do what I want?

Sarah