S-Function: Inital Value as Output

Hi at all,

I got a littel problem while using S-Function, written in C. At the beginning of the simualtion I compute some initial values. I want to pass out one of them on an output port during the mdlOutput Routine. For that reason I use the

    ssGetSimStatus

function an compare the result with the following expression:

    SIMSTATUS_INITIALIZING

As the result the output port is Zero for all time, which is actually not the expected one. Changing the expression to

    SIMSTAUTS_RUNNING

leads to the correct behavior, even during the initializing. (I figured this out with the help of fprintf function).

Does anybody know a way to set an output port to a specified value once at the initializing?

To help you understand my current implementation and problem, I post a snippet of my code, placed in the mdlOutput function:

// Set Schedule Value of the Rolling Force
 ssGetSimStatus(S, &SimStatus);
  if (SimStatus == SIMSTATUS_INITIALIZING)
  { Output[0] = DWorkVec[0];      
    #ifdef __EchoMode__
     fprintf(LogFile, "\tSet Schedule Value of the Rolling Force\n");
    #endif
  }

Thanks in advance, CN

Answer 1

[Kaustubha Govind]

mdlOutputs is indeed executed only during model execution, so ssGetSimStatus should always return SIMSTATUS_RUNNING. I think the status is SIMSTATUS_INITIALIZING in mdlInitializeConditions, so you need to initialize your DWork vector there and then use the DWork vector value in mdlOutputs.

Answer 2

[Christoph]

Thanks for your support Kaustubha,

I initailized my DWorkVector the right way in the mdlInitializeConditions function. I only want to reuse this vector to keep the number of DWork vectors snall. But if there is no other way I have to use another DWork vector or a vector with more dimensions.