|Fixed-Point Blockset Release Notes|
This section introduces the new features and enhancements added in the Fixed-Point Blockset 3.0 since the Fixed-Point Blockset 2.0 (Release 11.0).
This section is organized into these subsections:
The Fixed-Point Blockset 3.0 includes the new blocks listed below.
||Output the absolute value of the input.
||Perform the specified bitwise operation on the inputs.
|Data Type Propagation
||Configure the data type and scaling of the propagated signal based on information from the reference signals.
||Provide a region of zero output.
||Generate the dot product.
|Gateway In Inherited
||Convert a Simulink data type to a Fixed-Point Blockset data type, and inherit the data type and scaling.
||Delay a signal N sample periods.
|Look-Up Table Dynamic
||Approximate a one-dimensional function using a selected look-up method and a dynamically specified table.
||Output the minimum or maximum input value.
||Switch output between different inputs based on the value of the first input.
||Indicate the sign of the input.
||Delay a scalar signal multiple sample periods, and output all the delayed versions.
||Negate the input.
The Fixed-Point Blockset 3.0 includes the new functions listed below.
||Determine the exponent that gives the best precision fixed-point representation of a value.
||Determine the maximum precision available for the fixed-point representation of a value.
||Convert Simulink models and subsystems to fixed-point equivalents.
||Prepare a Simulink model for more complete conversion to fixed point.
||Restore links for fixed-point blocks.
Data Type Support
The Fixed-Point Blockset 3.0 has expanded its data type support:
1and a bias of
Data Type and Scaling Inheritance
Many fixed-point blocks support the inheritance of data type and scaling information from other blocks. The two possible inheritance options are:
Increased Speed, Efficiency, and Accuracy
Indirect logging of overflows and saturations via percent range error has been replaced by explicit logging.
You can now use the Simulink Accelerator in conjunction with the Fixed-Point Blockset. However, you cannot log minimum and maximum simulation values or overflows.
Model Parameter Configuration
You can now use the Model Parameter Configuration dialog box to override the Inline parameters option for selected parameters. You access this feature by selecting the Configure button on the Advanced tab of the Simulation Parameters dialog box. Previously, code generation for fixed point blocks required all parameters to be inline, or all parameters to be tunable.
Display of Scaling Information
To significantly improve simulation speed, the scaling information associated with fixed-point blocks is no longer updated. Since this scaling information can become obsolete, you should remove it by running
slupdate. To view data type and scaling information, you should select Port data types under the model's Format menu.
|Known Documentation Problem|