# Debugging the Sample Code

Debug the application as follows:

1. From the Launch Configuration dropdown menu, select blinky Debug. From the Launch Mode dropdown menu, select Debug. Both are shown in the "Launching a Debug Session" figure).
2. Press the Launch in Debug button (also shown in the "Launching a Debug Session" figure) to launch the debug session. J-Link downloads the blinky sample code to RSL15’s flash memory.

Figure: Launching a Debug Session

3. The Debug perspective opens and the application runs up to the first breakpoint in main. Press F8 or click the Resume icon () to resume the execution of the application. In the RSL15 EVB, you can see that a green and a blue LED are both blinking, at different rates. When push-button SW1 is pressed, the blinking of these two LEDs is disabled or enabled.