System time based on static systick isr counter #149
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src/systick.rs
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| // there can only be one! | ||
| #[exception] | ||
| fn SysTick() { | ||
| free(|_|unsafe { | ||
| if let Some(systime) = &mut SYSTIME { | ||
| systime.systick += 1; | ||
| } | ||
| }); | ||
| } |
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That is going to be an issue. We really shouldn't make any assumptions about the runtime here.
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So is it possible to wrap an interrupt without making assumptions about the ruintime?
I mean something better than adding a global fn SystickISR() {..}, which has to be called from the implementation isr.
h2obrain
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Maybe this could just be an example without changes to the hal? |
That is definitely possible. I was actually thinking about implementing a general "tick" counter crate a while back; something that you would initialise and then feed with monotonic counter updates which could be used for all kinds of purposes, e.g. a delay implementation. |
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I added this to the hal while playing with it. Maybe it fits the upstream :)