Fixed-Point Blockset

Parameter and Signal Conversions

The previous sections of this chapter, together with Data Types and Scaling, describe how data types, scaling, rounding, overflow handling, and arithmetic operations are incorporated into the Fixed-Point Blockset. With this knowledge, you can define the output of a fixed-point model by configuring fixed-point blocks to suit your particular application.

However, to completely understand the results generated by the Fixed-Point Blockset, you must be aware of these three issues:

• When numerical block parameters are converted from a double to a Fixed-Point Blockset data type
• When input signals are converted from one Fixed-Point Blockset data type to another (if at all)
• When arithmetic operations on input signals and parameters are performed

For example, suppose a fixed-point block performs an arithmetic operation on its input signal and a parameter, and then generates output having characteristics that are specified by the block. The following diagram illustrates how these issues are related.

The following sections discuss parameter conversions and signal conversions. Rules for Arithmetic Operations discusses arithmetic operations.

Summary

Parameter Conversions