Hauke Petersen 787d69c676 cpu/nrf52: add CPU specific sleep function
This function is supposed to be used for putting the CPU into
sleep mode for short amounts of time (e.g. in typical polling
loops used in periph drivers).
2018-02-02 11:33:18 +01:00
..
2017-11-16 14:40:16 +01:00