MATLAB REAL-TIME WORKSHOP EMBEDDED CODER - S Manuale Utente Scaricare il pdf (Pagina 16)

Variable Class Object Description Memory

GLOBAL

Normal global

variables

RAM

CAL

Global calibratable

parameters

ROM

DISP

Global observable

variables

RAM

MACRO

Global pre-processor

macros

CONST

Global constant ROM

FCN_ARG

Function arguments

(non-constant, call-by-

value)

STACK

FCN_PARAM

Function parameters

(constant, call-by-

value)

STACK

FCN_RETURN

Function return value STACK

EXTERN_GLOBAL_ALIAS

Global variables,

which are declared in

a user-written header

file

EXTERN_CAL_ALIAS

Calibratable global

variables, which are

declared in a user-

written header file

RTOS_ACCESS_FUNCTION

Apply an access

function to read/write

the variable

Table 1: Categories of variable classes

3.1.4 Simulation Using the Generated Code

The user can check and test whether the model behaves in the same way when

using the generated code. TargetLink has three options for running the model in

Simulink, Model In the Loop, MIL, Software In the Loop, SIL, and Process In the

Loop, PIL. By choosing MIL, the program runs the model as it is, using floating

point. If the user wants to run the model with the generated code then SIL should

be chosen and the program runs using the generated code. Process In the Loop

mode is used to verify simulation results from the MIL and SIL simulation modes

by executing the code on the actual target hardware. Process In the Loop was not

tested in this work.

By just clicking on the desired option: MIL, SIL or PIL, the user can easily and

without changing the model, control how to run in Simulink and the comparison

is, in that way, easily done between floating point and fixed point results.

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