Matlab 2019b don't recognise "Data Acquisition Commands"

Question

Hassan Mehmood Khan 2020-7-29

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/572017-matlab-2019b-don-t-recognise-data-acquisition-commands

评论： Walter Roberson 2020-7-29

在 MATLAB Online 中打开

I have been trying to connect NI USB 6009 to Matlab 2019b

Session base commands are recognised

I want to send Digital OUT signal ,but the "Session Commands" to ON or OFF Digital Output i cannot figure out

When i use these commands ,its working

d = daq.getDevices;
s = daq.createSession('ni');
sig = addDigitalChannel(s,'Dev1','port0/line0','OutputOnly');
signalData = sin(pi/2);
startBackground(s);

Following Messages i have

I want to use Data Acquisition Following are the commands i want to use , but the Matlab dont recognise them;

>> d = daqlist("ni")
Unrecognized function or variable 'daqlist'.
 
>> d = daqlist("ni")
Unrecognized function or variable 'daqlist'.
 
>> daq("ni")
Unrecognized function or variable 'daq'.

I have already checked the Data Acqusition Toolbox is installed. but Data Acqusition Commands are not recognisable.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2020-7-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/572017-matlab-2019b-don-t-recognise-data-acquisition-commands#answer_472222

编辑：Walter Roberson 2020-7-29

daqlist is new in R2020a

For clocked operations see https://www.mathworks.com/matlabcentral/answers/270638-how-do-i-share-a-clock-between-unclocked-digital-inputs-and-clocked-analog-inputs#answer_212066

2 个评论
显示无隐藏无

Hassan Mehmood Khan 2020-7-29

在 MATLAB Online 中打开

The artcile was not of so help

I am sorry i am very new to DAQ in Matlab.

I only want to turn on and off digital IO using NI USB 6009

I am using the code below

d = daq.getDevices;
s = daq.createSession('ni');
s.Rate = 5;
oneCycle = 1;
addDigitalChannel(s,'Dev1','port0/line0','OutputOnly');
outputSingleScan(s,oneCycle);

Walter Roberson 2020-7-29

The article says clearly that you cannot use startForeground or startBackground with digital pins for a fair number of National Instrument DAQs, and that even for the ones that permit using those calls, that it is often restricted as to which pins can be used.

The NI USB 6009 is a fairly low-end model. You probably cannot use the calls with any of the digital pins for the USB6009.

Using outputSingleScan is the way to proceed for the digital pins.

请先登录，再进行评论。