Power Management Example — Rust

Source: apps/rust/heap/example_pm/src/lib.rs (also apps/rust/zeroheap/example_pm/src/lib.rs) | WASM demo not available

Demonstrates the PM state machine with automatic idle transitions, peripheral power domain reference counting, wake source registration (GPIO button + UART), custom battery-aware power policy, transition notifications, and runtime power statistics.

Language-specific patterns

This example uses the ove Rust crate with no_std support. Error handling uses Result<T, ove::Error> with per-op narrow error sets (e.g. try_send_for returns only Timeout/QueueFull). Shared state uses atomics; cross-thread kernel-object sharing uses Arc<T> in heap mode (from ove::heap::Arc) and ove::shared! cells (InitCell<T>) in zero-heap mode. #[ove::main] exports the C-ABI entry symbol.

See the overview for architecture details and the full API list.

How to build

# Native POSIX
make host.posix.example_pm_rust         # heap mode
make host.posix.example_pm_rust_zh      # zero-heap mode
make configure && make download && make && make run