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Chapter 2  Example 2: parameters and hierarchy in algorithm

From the principal window, choose File / Save as and save your second application under your tutorial folder with the name example2.

2.1  Definition of the function A

To create the A function definition:

• from the algorithm window:
  • click on the + green button → dialog window: check Function then type A and click OK,
  • click on the + green button → dialog window: check Constant then type constante<X> and click OK. Create an integer output port o inside;
• in the A definition window:
  • create a reference cst<T> to the definition constante,
  • create an integer input port a, an integer output port o (Contextual menu → Add port cf. 1.1.3);
• from the algorithm window,
  create a function definition calcul1, with two integer input ports a and b and an integer output port o;
• in the A definition window:
  • create a reference calc1 to the definition calcul1,
  • add a parameter name (cf. figure 2.1): Field Parameters → T.

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    Figure 2.1: Parameters

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The function A looks like the figure 2.2.

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Figure 2.2: Function A

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2.2  Definition of the function B

To create the B function definition:

• from the algorithm window: + green button → dialog window: B<X;Y>;
• in the B definition window:
  • create references A1 and A2 to the definition A (A1<X> A2<Y>),
  • create two integer input ports a and b, one integer output port o, and the function calc1 of the definition calcul1,
  • add the parameters names X and Y (field Parameters).

The function B looks like the figure 2.3.

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Figure 2.3: Function B

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2.3  Definition of the algorithm with hierarchy

To create the Main algorithm:

• from the algorithm window: + green button → dialog window: Main;
• from the definition window, define it as main;
• create a sensor input with an integer output port o and an actuator output with an integer input port i;
• in the Main algorithm window, create a reference B<1;2> to the definition B, a reference i1 i2 to the definition input, and a reference out to the definition output;
• create dependences between the references.

The algorithm looks like the figure 2.4.

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Figure 2.4: Algorithm of the Example 2

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From the principal window, choose File / Close. In the dialog window, click on the Save button.

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