xPC Target

Signal Monitoring with MATLAB

Signal monitoring is the process for acquiring signal data during a real-time run without time information. The advantage with signal monitoring is that there is no additional load on the real-time tasks. Use signal monitoring to acquire signal data without creating scopes that run on the target PC.

After you start running a target application, you can use signal monitoring to get signal data. This procedure uses the model xpc_osc3.mdl as an example, and assumes you created and downloaded the target application to the target PC:

1. To get a list of signals, type either

• set(tg, 'ShowSignals', 'On') or tg.ShowSignals='On'
  

1. The MATLAB window displays a list of the target objects properties for the available signals. For example, the signals for the model xpc_osc3.mdl are shown below.

   • ShowSignals = On
        Signals = PROP.   VALUE             BLOCK NAME
                  S0      0.000000          Transfer Fcn
                  S1      0.000000          Signal Generator
     

The signal names (S0, S1 . . .) are properties of a target object. See also Signal Tracing with MATLAB.

2. To get the value of a signal, in the MATLAB Command Window, type

• tg.S1
  

1. MATLAB displays the value of the signal S1.

   • ans=
             3.731
     

Signals and Parameters

Signal Tracing