To test if GPIO interrupts can wake the CPU from sleep, configure BTN0 (if availiable) as a wake-up source. Pressing the buttong should wake up the CPU.
Expected result
You should be presented with the RIOT shell, providing you with commands to test the power management implementation by forcing the CPU to set a certain power mode. An external power measurement device is needed to observe the effect.
Some power modes may require a certain event to wake up. Reset the CPU if needed.
If a RTC peripheral is available, an additional command to temporarily unblock a power mode is available (provided that the CPU can wake-up from given power mode).
Background
Test the functionality of the platform's power management implementation.