Why Did The Fixed-Point Tool Not Propose Data Types?

Inadequate Range Information

The Fixed-Point Tool bases its data type proposition on range information collected through simulation, derivation, and design ranges that you provide. Before proposing data types, you must collect range information which the Fixed-Point Tool uses to propose data types.

To collect range information, simulate the system with range collection enabled in the Fixed-Point Tool, or derive minimum and maximum values. The Fixed-Point Advisor check Create simulation reference data also creates reference data to use for comparison and analysis.

Inherited Output Data Types

Blocks with inherited output data types use internal block rules to determine the output data type of the block. To enable proposals for results that specify an inherited output data type, in the Fixed-Point Tool, in the Convert Data Types section of the toolstrip, under Settings, set the Convert inherited types setting to Yes.

If this setting is set to No, the Fixed-Point Tool marks the proposal for these blocks as N/A.