max/embassy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

add speed optimization

Browse Source
This commit is contained in:
JuliDi 2023-12-04 20:59:08 +01:00
parent 85d5f42562
commit 0b0ca62a95
No known key found for this signature in database
GPG Key ID: E1E90AE563D09D63
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
docs/modules/ROOT/pages/faq.adoc
View File

@ -135,3 +135,19 @@ embassy-time = { git = "https://github.com/embassy-rs/embassy.git", rev = "e5fdd
---- ----
Note that the git revision should match any other embassy patches or git dependencies that you are using! Note that the git revision should match any other embassy patches or git dependencies that you are using!
== How can I optimize the speed of my embassy-stm32 program?
* Make sure RCC is set up to go as fast as possible
* Make sure link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html[flash cache] is enabled
* build with `--release`
* Set the following keys for the release profile in your `Cargo.toml``:
** `opt-level=s`
** `lto=fat`
** `build-std=core`
** `build-std-features=panic_immediate_abort`
* Enable feature `embassy-time/generic-queue`, disable feature `embassy-executor/integrated-timers`
* When using `InterruptExecutor`:
** disable `executor-thread`
** make `main`` spawn everything, then enable link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html#method.set_sleeponexit[SCB.SLEEPONEXIT] and `loop { cortex_m::asm::wfi() }`
** *Note:* If you need 2 priority levels, using 2 interrupt executors is better than 1 thread executor + 1 interrupt executor.