PS EMIO GPIO -- Counter (baremetal)

Problem 
Using EMIO GPIO pins show a counter on LEDs DS15-DS22 in the ZC702 evaluation board.

Solution
According to "UG850 (v1.3) June 4, 2014" page 45, the following table shows corresponding pin for each LED.
 LED Reference     Net Name XC7Z020 AP SoC Pin
 DS15 PMOD2 3 P17