Documentation

Use Boolean for control logic signals such as enable and local reset signals. If you want to calculate a Boolean signal with a fixed-point data type, use a Data Type Conversion to convert the signal to a fixdt (0,1,0) type.

To perform numeric calculations, use fixdt (0,1,0). Sometimes, the output bit width can become larger than the bitwidth. To perform such operations, use the Inherit: Inherit via internal rule setting, because of the numerictype property of fixdt (0,1,0).

Specify a Simulink.NumericType object, such as fixdt (1, 16, 8).

Make sure that the Gain parameter of the block does not use a round parameter value. To avoid rounding of the gain value, you can specify a fi object, such as fi(3.44,0,8,4).

Avoid using Inherit:Inherit via internal rule. This setting can result in an erroneous data type being assigned to the block, thereby resulting in an HDL code generation error.

You cannot use an enumerated data type for the input or output port of the top-level DUT.

You must use monotonically increasing enumeration values. For example, see this code:

classdef  BasicColors < Simulink.IntEnumType 
enumeration
    Red(0) 
    Yellow(1)
    Blue(2)
end
methods (Static)
    function  retVal = getDefaultValue() 
        retVal = BasicColors.Blue;
      end
   end
end

You cannot perform arithmetic operations such as *, / , -, and + with enumeration values.

You cannot perform comparison operations such as >, <, >=, <=, ==, and ~= with enumeration values. You can perform a <> operation or a conditional branch such as if or switch.