User`s guide

Preparing to E xport F ilter Coefficients to Code Co mposer Studio™ Projects
type to suggest, refer to “How FDATool Determine s the Export Suggested
Data Type” on page 5-7.
Follow these best-practice gu idelines when you implement your filter
algorithm in source code and design your filter in FDATool:
• Implement your filter using one of the data types FDATool exports w itho ut
modifications.
• Design your filter in FDATool using the data type you used to implement
your filter.
To Choose the Export Data Type
When you export your filter, follow this procedure to select the e xport data
type to en s ure the exported filter coefficients closely match the coefficients of
your filter in FDATool.
1 In FDATool, select Targets > Code Composer Studio IDE to open the
Export to Code Composer Studio IDE dialog box.
2 Perform one of the following actions:
• Select Export suggested to export the coefficients in the suggested
data type.
• Select Export as and choose the data type your filter requires from
the list.
Caution If you select Export as,theexportedfilter coefficients can be
very different from the filter coefficients in FD AT ool. As a result, y our
filter cutoff frequencies and performance may not match your design
in FDATool.
How FDATool Determines the Export Suggested Data Type
By default, FDATool represents filter coefficients as double-precision
floating-point data. When you export your filte r coefficients, FD ATool
suggests the same data type.
5-7