The source code for the C5515 EVM Programmer is available for download via:
CCS3.3: http://code.google.com/p/c5505-ezdsp/downloads/detail?name=programmer_c5515evm.zip
CCS4.x: http://code.google.com/p/c5505-ezdsp/downloads/detail?name=programmer_c5515evm_ccs4.zip
as a reference for your development.
[EDIT - Added CCS4 link]