Learning Forum

[raphael.courousse.1]

How do I use the types defined in stdint.h in my models ? Do i have to import them ? If so how do I procede.

[Benjamin Descorps]

Hello,

To use external definitions (whatever it concerns types, constants or functions), you should use imported code.

As example, you can define a new type and declare it as imported. In the Properties, you can select the Definition file that provides its C definition. Finally, you could define some constraints on this type, expecially if it is a numeric type (useful to allow use of mathematical Scade functions for example):

Use of imported types introduces some constraints. You must also provide:

• an init function for KCG
• copy and comp functions

You can refer to the chapter Design and Model Editing > 3 / Designing Models > Defining Data Types > Setting Imported Types of the USer Manual for further information.

Benjamin

[raphael.courousse.1]

How do I make those 3 functions for my imported type ?  Why does KCG tries to re-define the type (this is kcg_imported_types.dh) when it's already defined here  in my user_macros.h ?

Also will my operators be able to process my imported types ?

Raphaël

[Benjamin Descorps]

Hello,

The init function is required to define behavior for initialization. Example:

void int32_t_init(int32_t *kcg_c1)
{
    *kcg_c1= 0;
}

This is the minimum required to generate code with KCG.

For Simulation purpose, you will need to provide some additional functions:

• conversion functions are necessary for displaying observable variables of immorted types
• Comparison functions are necessary for evaluating breakpoints and for checking expected values against simulation values

You should refer to the Technical Manual for additional information and for an example.

I will point out that use of imported types shall be reserved to complex cases.

For numeric types, I will rather recommend you to use the native types of the Scade language (integr/float types of the Scade language). For mapping with the C types, you have possibility to map implementation of these numeric types with definition of your stdint.h library. As example, KCG generates the following default definition:

You can the provide your own definition of the macro kcg_int32 and map it to definition of stdint.h.

It could be a way to avoid use of imported types in your Scade model.

Hope this helps,

Benjamin

[raphael.courousse.1]

The bypass worked just fine. Thanks a lot !