LogicAnalyser - Variable Number of inputs

Question

Scott 2017-3-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331549-logicanalyser-variable-number-of-inputs

评论： Bharath Venkataraman 2017-3-24

When using the DSP logic analyser the step method expects to receive N inputs where N is equal to the number of input ports specified when instanciating the scope

scope = dsp.LogicAnalyzer('NumInputPorts',3);

I'm trying create a script to plot data from the output of a Simulink model where there can be any number of inputs. The output from the simulink model is a "Stucture with Time" named yout.

data = [yout.signals.values]

Gives me the data i need, i can access each step by iterating though each row of data but I don't know how to pass all N signals for a single time step to the LogicAnalyzer object. data contains logical values.

Is there a method to pass the logic analyzer a variable number of data points? Perhaps as a vector?

The only solution I have come up with is to use eval to execute the step command with a string I create that contains 'data(t,1), data(t,2)... '

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

Bharath Venkataraman 2017-3-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331549-logicanalyser-variable-number-of-inputs#answer_260116

Please take a look at the file analyzeLogicFromSimulink to see how to pass in the entire set of data at one go. This function creates and plots all the logged data from a Simulink simulation.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Scott 2017-3-24

在 MATLAB Online 中打开

A slight improvement to add the output block names to the signals on the logic analyser.

function scope = LogicAnalyzerSignalNames(dataset)
% LogicAnalyserSignalNames
%
  scope = analyzeLogicFromSimulink(dataset);
    numElements = dataset.numElements;
    for ii = 1:numElements
       blkName = dataset.getElement(ii).BlockPath.getBlock(1);
       scope.modifyDisplayChannel(ii,'Name',blkName);
    end
end