MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur télécharger pdf (Page 194)

6 Program Architecture

6-32

• Initialize a vector of sample times and sample time offsets and store this

vector in the

SimStruct.

• Store the values of the block initial conditions and program parameters in

the

SimStruct.

• Compute the block and system outputs.

• Update the discrete state vector.

• Compute derivatives for continuous models.

• Perform an orderly termination at the end of the program (when the current

time equals the final time, if a final time is specified).

• Collect block and scope data for data logging (either with the Real-Time

Workshop or third-party tools).

The SimStruct Data Structure

The generated code includes the file simstruc.h, which contains the definition

of the

SimStruct data structure. Each instance of a model (or an S-function) in

the program creates its own

SimStruct, which it uses for reading and writing

data.

All functions in the generated code are public. For this reason, there can be only

one instance of a model in a real-time program. This function, which always

has the same name as the model, is called during program initialization to

return a pointer to the

SimStruct and initialize any S-functions.

Rapid Prototyping Model Code Functions

The functions defined by the model code are called at various stages of program

execution (i.e., initialization, model execution, or program termination).

The following diagram illustrates the functions defined in the generated code

and shows what part of the program executes each function.

1 2 ... 189 190 191 192 193 194 195 196 197 198 199 ... 385 386

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MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Guide de l'utilisateur Page 194