rust-embedded / rust-embedded/cortex-m
Delay should sleep the CPU
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- Dominant language
- Rust
- Stars
- 1k
- Forks
- 202
- Avg merge
- 6d 2h
- Merged PRs (30d)
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Description
Rather than busy-wait the CPU, the delay implementation should set the systick to generate an interrupt on overflow, and sleep with a wfi. This would reduce power consumption.
You might need to put it behind a flag because you'd have to replace DefaultHandler_ for systick with something that didn't loop forever...
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the delay implementation and the Cortex-M SysTick and DefaultHandler entry points mentioned in the issue. Determine how an overflow interrupt and wfi can replace busy-waiting, and whether the behavior needs a feature flag; done means delay sleeps the CPU while preserving the existing behavior where the flag is not enabled.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- embedded-iot
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100