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add extra info to stable arena usage

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Adin Ackerman 2024-01-16 20:00:39 -08:00
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docs/modules/ROOT/pages/faq.adoc
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@ -158,6 +158,23 @@ Note that the git revision should match any other embassy patches or git depende
When you aren't using the `nightly` feature of `embassy-executor`, the executor uses a bump allocator, which may require configuration. When you aren't using the `nightly` feature of `embassy-executor`, the executor uses a bump allocator, which may require configuration.
Something like this error will occur at **compile time** if the task arena is *too large* for the target's RAM:
[source,plain]
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rust-lld: error: section '.bss' will not fit in region 'RAM': overflowed by _ bytes
rust-lld: error: section '.uninit' will not fit in region 'RAM': overflowed by _ bytes
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And this message will appear at **runtime** if the task arena is *too small* for the tasks running:
[source,plain]
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ERROR panicked at 'embassy-executor: task arena is full. You must increase the arena size, see the documentation for details: https://docs.embassy.dev/embassy-executor/'
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NOTE: If all tasks are spawned at startup, this panic will occur immediately.
Check out link:https://docs.embassy.dev/embassy-executor/git/cortex-m/index.html#task-arena[Task Arena Documentation] for more details. Check out link:https://docs.embassy.dev/embassy-executor/git/cortex-m/index.html#task-arena[Task Arena Documentation] for more details.
== Can I use manual ISRs alongside Embassy? == Can I use manual ISRs alongside Embassy?