rtic-monotonics: Improve docs on interrupt priority

rtic-monotonics/src/lib.rs

@@ -25,6 +25,13 @@
 //! tag, describing what parts _do_ support that monotonic. Monotonics without an
 //! `Available on crate features X only` tag are available on any `nrf52*` feature.
 //!
+//! # Priority of interrupt handlers
+//!
+//! The priority of timer interrupts are based on `RTIC_ASYNC_MAX_LOGICAL_PRIO` generated by RTIC.
+//! It is calculated to be 1 less than the maximum hardware task priority (to not have impact on
+//! hardware tasks), or, if no hardware task is available, is set to the maximum priority in the
+//! system.
+
 // To build these docs correctly:
 // RUSTFLAGS="--cfg docsrs" cargo +nightly doc --features thumbv7-backend,cortex-m-systick,rp2040,nrf52840,imxrt_gpt1,imxrt_gpt2,imxrt-ral/imxrt1011,stm32h725ag,stm32_tim2,stm32_tim3,stm32_tim4,stm32_tim5,stm32_tim15