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Introduction

When you use buses in a model for which you intend to generate code:

• Setting appropriate diagnostic configuration parameters can add to the ease of development.

• The bus implementation techniques used can affect the speed, size, and clarity of that code.

• Some bus implementation techniques that can be useful are not immediately obvious.

This chapter contains guidelines that you can use to improve the results when you work with buses. The guidelines describe techniques for:

• Simplifying the layout of the model

• Increasing the efficiency of generated code

• Defining data structures for function/subsystem interfaces

• Defining data structures that match existing data structures in external C code

Some tradeoffs inevitably exist among speed, size, and clarity. For example, the code for nonvirtual buses is easier to read because the buses appear in the code as structures, but the code for virtual buses is faster because virtual buses do not require copying signal data. The applicability of some guidelines can therefore depend on where you are in the application development process.

This chapter focuses on optimizations that are appropriate for final production code. Before you read this chapter, be sure that you have read Using Composite Signals. This chapter assumes that you understand all the concepts and procedures described in that one, including the blocks used for creating and manipulating buses.

Optimizing Buses for Code Generation

Setting Bus Diagnostics

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