Hi
The software available for c5502 is either the BSL package available with Spectrum Digital
http://support.spectrumdigital.com/boards/ezdsp5502/revc/
or the CSL examples available
http://www.ti.com/tool/sprc133
If you are not able to find any code base to start with, from either of these, you will need to develop this on your own with the documentation available.
Please consider using newer devices like 5517 for your development
Regards
Mukul