Creating Fortran S-Functions 6 Introduction 6-2 Level 1 Versus level 2 S-Functions Creating Level 1 Fortran S-Functions The Fortran MEX Template File Example Inline Code Generation Example Creating Level 2 Fortran S-Functions 67 Template File .6-7 C/Fortran Interfacing Tips Constructing the Gateway 6-1 Example C-MeX S-Function Calling Fortran Code 6-13 Porting Legacy Code 6-14 Find the states 614 Sample Times 6-1 Multiple Instances 6-1 Use Flints If Needed 615 Considerations for real time 615 Implementing block Features 7 Dialog Parameters ......72 Tunable parameters Run-Time Parameters 7-5 Creating Run-Time Parameters 7-6 Updating Run-Time Parameters 77 Creating Input and Output Ports Creating Input Ports Creating Output Portsiv Contents 6 Creating Fortran S-Functions Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Level 1 Versus Level 2 S-Functions . . . . . . . . . . . . . . . . . . . . . . 6-2 Creating Level 1 Fortran S-Functions . . . . . . . . . . . . . . . . . . . 6-3 The Fortran MEX Template File . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Inline Code Generation Example . . . . . . . . . . . . . . . . . . . . . . . . 6-6 Creating Level 2 Fortran S-Functions . . . . . . . . . . . . . . . . . . . 6-7 Template File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 C/Fortran Interfacing Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 Constructing the Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11 Example C-MEX S-Function Calling Fortran Code . . . . . . . . . 6-13 Porting Legacy Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 Find the States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 Sample Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 Multiple Instances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14 Use Flints If Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15 Considerations for Real Time . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15 7 Implementing Block Features Dialog Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Tunable Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 Run-Time Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5 Creating Run-Time Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 7-6 Updating Run-Time Parameters . . . . . . . . . . . . . . . . . . . . . . . . . 7-7 Creating Input and Output Ports . . . . . . . . . . . . . . . . . . . . . . . 7-8 Creating Input Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 Creating Output Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10