Q.  Can I calculate the time delay between two execution points with Ride7 ?

A.  No.

Because of the unpredictable nature of USB protocol timing (0 to 1ms latency for every transaction) the software cannot calculate the real time that elapsed during two events with the precision that you need.

The time stamps in the debug log cannot be used to determine the actual time that the CPU spent in execution, except if you are interested in very large times.