Clock source for internal DSP and external timer

Hi Team,

We are calculating the time for a particular set of application and tried with possible 2 options:

a. Using internal core timer , i.e., TSCL

b. Using external timer with internal dsp clock as the source.

Target: C6678

CCS: 5.5 ; Simulator mode.

We could see that time calculated using approaches (a) and (b) are different.

The code snippet used is attached for reference for register configuration.

Please check and let me know if there is anything that can done ?(Please visit the site to view this file)