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diff --git a/book/en/src/by-example/tips_monotonic_impl.md b/book/en/src/by-example/tips_monotonic_impl.md deleted file mode 100644 index 57b0a01..0000000 --- a/book/en/src/by-example/tips_monotonic_impl.md +++ /dev/null @@ -1,29 +0,0 @@ -# Implementing a `Monotonic` timer for scheduling - -The framework is flexible because it can use any timer which has compare-match and optionally supporting overflow interrupts for scheduling. The single requirement to make a timer usable with RTIC is implementing the [`rtic-time::Monotonic`] trait. - -For RTIC 1.0 and 2.0 we instead assume the user has a time library, e.g. [`fugit`] or [`embedded_time`], as the basis for all time-based operations when implementing `Monotonic`. These libraries make it much easier to correctly implement the `Monotonic` trait, allowing the use of -almost any timer in the system for scheduling. - -The trait documents the requirements for each method, and for inspiration -there is a reference implementation based on the `SysTick` timer available on all ARM Cortex M MCUs. - -- [`Systick based`], runs at a fixed interrupt (tick) rate - with some overhead but simple and provides support for large time spans - -Here is a list of `Monotonic` implementations for RTIC 1.0: - -- [`STM32F411 series`], implemented for the 32-bit timers -- [`Nordic nRF52 series Timer`], implemented for the 32-bit timers -- [`Nordic nRF52 series RTC`], implemented for the RTCs -- [`DWT and Systick based`], a more efficient (tickless) implementation - requires both `SysTick` and `DWT`, supports both high resolution and large time spans - -If you know of more implementations feel free to add them to this list. - -[`rtic_time::Monotonic`]: https://docs.rs/rtic_time/ -[`fugit`]: https://docs.rs/fugit/ -[`embedded_time`]: https://docs.rs/embedded_time/ -[`STM32F411 series`]: https://github.com/kalkyl/f411-rtic/blob/a696fce7d6d19fda2356c37642c4d53547982cca/src/mono.rs -[`Nordic nRF52 series Timer`]: https://github.com/kalkyl/nrf-play/blob/47f4410d4e39374c18ff58dc17c25159085fb526/src/mono.rs -[`Nordic nRF52 series RTC`]: https://gist.github.com/korken89/fe94a475726414dd1bce031c76adc3dd -[`Systick based`]: https://github.com/rtic-monotonics -[`DWT and Systick based`]: https://github.com/rtic-rs/dwt-systick-monotonic |