User`s guide

5 Exporting F ilter Coefficients from FDATool
Preparing to E xport Filter Coefficients to Code Composer
Studio Projects
In this section...
“Features of a Filter” on page 5-4
“Selecting the Export Mode” on page 5-5
“Choosing the Export D ata Type” on page 5-6
Features of a Filter
When you create a filter in FDATool, the filter includes defining features
identified in the following table.
Defining
Feature
Description
Structure Structure defines how the elements of a digital
filter—gains, a dders /subtractors, and delays— combine
to form the filter. See the Signal Proce ssing Toolbox
documentationintheOnlineHelpsystemformore
information abou t filter structures.
Design Method
Defines the m a thematical algorithm u sed to determine
the filter response, length, and coefficients.
Response
Type and
Specifications
Defines the filter passband shape, such as lowpass or
bandpass, and the specifications for the passband.
Coefficients Defines how the filter structure responds at each stage
of the filter process.
Data Type
Defines how to represent the filter coefficients and
the resulting fi ltere d output. W hether your filter uses
floating-point or fixed-point coefficients affects the filter
response and output data values.
When you export your filter, FDATool exports only the number of and value of
the filter coe fficients and the data type used to define the coefficients.
5-4