Oleg,
Programming the DSPs through the JTAG chain using a compatible JTAG emulator is easy to do using Code Composer Studio as long as you have a stable and configured JTAG chain for the emulator to use.
If you are asking how to configure that JTAG chain using the SN74LVT8980 / SN74LVT8986, that is not something we would know about on this C67x Single Core DSP Forum.
If you will clarify what you are looking for, we can ask moderator to move this to the appropriate forum, such as the Logic Forum for those LVT devices.
You may want to edit your post and title to correct the part numbers, unless I misunderstood that you had some typos.
Regards,
RandyP