Documentation about nrf-softdevice HOT 1 OPEN

Safety notes:

• The SoftDevice needs exclusive access to some peripherals (RADIO, some TIMERs, SWI/EGUs, ECB, AAR..), you have to make sure not to use them on your own. Softdevice::enable() takes the PAC register blocks for these so safe code is unable to use them anymore (to be done, #4 ), but this still means you have to make sure to not use unsafe code to somehow still use these peripherals (such as Peripherals::take(), raw pointers, or calling into C code that uses them).
• The SoftDevice needs exclusive access to some IRQs and priority levels. You must make sure not to use them. This includes NOT using cortex-m NVIC functions!! Using these is UNSAFE even if they're marked as safe. There is a proposal to split cortex-m so that the "opinionated concurrency model" functions would be opt-in (rust-embedded/cortex-m#239)
• PPI? #14

from nrf-softdevice.