Module completion 

ISR-safe DMA completion signaling for async and sync present paths.

CompletionSlot is runtime-agnostic: call CompletionSlot::signal from a DMA ISR, poll with CompletionSlot::is_signaled in RTIC/bare-metal tasks, or await via WaitTransfer / WaitTransferFuture under Embassy.

Structs

CompletionSlot

One-shot completion flag with optional async waker notification.

WaitTransfer

Reference AsyncDmaTransfer token backed by a CompletionSlot.

WaitTransferFuture

Future returned by WaitTransfer::wait_async.