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stm32: compute stop mode and workaround rtt test bug

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This commit is contained in:
xoviat
2023-11-04 13:49:54 -05:00
parent 2765f0978f
commit dc467e89a0
8 changed files with 71 additions and 22 deletions
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32
embassy-stm32/build.rs
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@@ -556,6 +556,32 @@ fn main() {
},
};
/*
If LP and non-LP peripherals share the same RCC enable bit, then a refcount leak will result.
This should be checked in stm32-data-gen.
*/
let stop_refcount = if p.name.starts_with("LP") {
quote! { REFCOUNT_STOP2 }
} else {
quote! { REFCOUNT_STOP1 }
};
let (incr_stop_refcount, decr_stop_refcount) = if p.name != "RTC" {
(
quote! {
#[cfg(feature = "low-power")]
unsafe { crate::rcc::#stop_refcount += 1 };
},
quote! {
#[cfg(feature = "low-power")]
unsafe { crate::rcc::#stop_refcount -= 1 };
},
)
} else {
(quote! {}, quote! {})
};
g.extend(quote! {
impl crate::rcc::sealed::RccPeripheral for peripherals::#pname {
fn frequency() -> crate::time::Hertz {
@@ -563,8 +589,7 @@ fn main() {
}
fn enable_and_reset_with_cs(_cs: critical_section::CriticalSection) {
#before_enable
#[cfg(feature = "low-power")]
unsafe { crate::rcc::REFCOUNT_STOP2 += 1 };
#incr_stop_refcount
crate::pac::RCC.#en_reg().modify(|w| w.#set_en_field(true));
#after_enable
#rst
@@ -572,8 +597,7 @@ fn main() {
fn disable_with_cs(_cs: critical_section::CriticalSection) {
#before_disable
crate::pac::RCC.#en_reg().modify(|w| w.#set_en_field(false));
#[cfg(feature = "low-power")]
unsafe { crate::rcc::REFCOUNT_STOP2 -= 1 };
#decr_stop_refcount
}
}