Ahmet,
Let me see if I understand this, and I may have some questions to ask. Is that okay?
You have an application that is working (implemented) on the C6713DSK, and this application has something to do with digital communications. With what other board or device is the DSK communicating? What digital communication method is it using?
Since you saw ADC output (DSP side) and DAC input (generated by DSP), I assume you have some analog signal source on the ADC's analog input and something like a headphone or speaker on the DAC's analog output. Are those two assumptions correct?
And now you want to get digital data out so you can display it on a digital oscilloscope? Do I have the concepts correct, so I know the right direction to try to point you?
I am not familiar with MsC. What is this acronym? I am sorry for my ignorance. May I assume you have a professor and/or instructor who have guided to this point in the project? Or do I misunderstand, again?
I can easily tell you that the HPI port will not work for whatever you are trying to do. It is a slave port on the C6713 so it could not be useful for any method of displaying data that only involves the DSK. If there is another host processor, then the Host Port Interface could be useful, but you have not mentioned that here.
Digital data can be sent on all of the other peripheral ports, including the parallel and serial ports. Until I understand more completely, I will not have a recommendation for you, however.
Regards,
RandyP