Henrik Wahlqvist 35d3b16bb6 Improve TargetLink documentation

Change-Id: I97db0801183f5fa420e700f44b0a3c52e670a856

2024-10-04 15:36:30 +02:00

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TargetLink Function Blocks

[TOC]

Why

To insert a function block in a subsystem will insert a function call in the C code generated from the model. This will reduce the complexity numbers, increase testability and protect against memory problems if there is an interrupt and the function needs to be saved temporary to the memory.

How

Insert FUNCTION Block

Insert a green FUNCTION block in the subsystem. Double click the green block and set "Step function name" to $N_$B and "Init function name" to INIT_$N_$B.

Important Aspects in the Model

There are two important aspects that need attention.

Signal Feedback

When using feedback from one subsystem block to another, it is important to use the unit delay block when one uses function blocks. Strangely one also needs a rename block after, since the unit delay block in this case can not have a readable signal configuration.

Model Output Signals

Model output signals, prefix starting with sVc and yVc, needs to have copies that are local readables, prefix rVc and xVc, otherwise they will be removed by the current code optimization.

Code Example

Void VcModelName(Void)
{
   /* SLStaticLocalInit: Default storage class for static local variables with initvalue | Width: 8
    */
   static Bool X_SModelName2_UnitDelay1 = 0;

   /* call of function: VcModelName/VcModelName/2_SignalCalc */
   VcModelName_2_SignalCalc();

   /* VcModelName/VcModelName/RenameSignal/InPort */
   xVcModelName_B_ConvEffCmplt = X_SModelName2_UnitDelay1;

   /* call of function: VcModelName/VcModelName/1_Entry */
   VcModelName_1_Entry();

   /* call of function: VcModelName/VcModelName/3_Evaluation */
   VcModelName_3_Evaluation();

   /* TargetLink outport: VcModelName/sVcModelName_rt_CnvnMeasd1 */
   sVcModelName_m_NoxUs = SModelName44_Switch;

   /* call of function: VcModelName/VcModelName/4_Judgement */
   VcModelName_4_Judgement();

}
#include "MemMap_CVC_STOP.h"


/**************************************************************************************************\
 ***  FUNCTION:
 ***      VcModelName_1_Entry
 ***
 ***  DESCRIPTION:
 ***
 ***
 ***  PARAMETERS:
 ***      Type               Name                Description
 ***      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ***
 ***  RETURNS:
 ***      Void
 ***
 ***  SETTINGS:
 ***
\**************************************************************************************************/
#include "MemMap_CVC_START.h"

Void VcModelName_1_Entry(Void)
{

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