User`s guide

Getting Started

14-11

The times2 model contains a simple S-function, called timestwo,thattakesthe

input sine wave signal and doubles its amplitude. The TLC file corresponding

to the S-function is shown below:

%% Abstract:

%% TLC file for timestwo.c used in Real-Time Workshop

%% S-Function test.

%implements "timestwo" "Ada"

%% Function: Outputs

==========================================================

%function Outputs(block, system) Output

-- %<Type> Block: %<Name>

-- Multiply input by two

%<LibBlockOutputSignal(0, "", "", 0)> := ...

%<LibBlockInputSignal(0, "", "", 0) > * 2.0;

%endfunction

%% [EOF] timestwo.tlc

The key line in this TLC file is the assignment of two times the

LibBlockInputSignal to the LibBlockOutputSignal. This line directs the

Target Language Compiler to place the algorithm directly into the generated

Ada code.

This TLC file is located in

matlabroot/toolbox/simulink/blocks/tlc_ada/timestwo.tlc.

Generating the Ada Code

The build process is similar to the case where your model does not contain any

S-functions. The only additional requirement for generating Ada code for

models containing S-functions is to provide a TLC file with the same name as

the S-function. Otherwise, the build procedure is exactly the same.