Hi Takepiro,
You can use the DSP Readback cell in SigmaStudio to read the signal at any point in the signal flow.
http://wiki.analog.com/resources/tools-software/sigmastudio/toolbox/basicdsp/dspreadback
In a real system, the microcontroller can emulate this function. In order to determine what addresses to read, use the DSP Readback cell in SigmaStudio and watch the Capture Window to see what memory addresses correspond to the readback cell.