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Actually transition to dual bank mode - key was required

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This commit is contained in:
Rasmus Melchior Jacobsen 2023-05-25 13:08:40 +02:00
parent efc71e08c4
commit 15636f05f5
1 changed files with 24 additions and 5 deletions
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29
embassy-stm32/src/flash/f4.rs
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@ -71,7 +71,7 @@ mod alt_regions {
impl<'d> Flash<'d> {
pub fn into_alt_regions(self) -> AltFlashLayout<'d, Async> {
unsafe { crate::pac::FLASH.optcr().modify(|r| r.set_db1m(true)) };
super::set_alt_layout();
// SAFETY: We never expose the cloned peripheral references, and their instance is not public.
// Also, all async flash region operations are protected with a mutex.
@ -88,7 +88,7 @@ mod alt_regions {
}
pub fn into_alt_blocking_regions(self) -> AltFlashLayout<'d, Blocking> {
unsafe { crate::pac::FLASH.optcr().modify(|r| r.set_db1m(true)) };
super::set_alt_layout();
// SAFETY: We never expose the cloned peripheral references, and their instance is not public.
// Also, all blocking flash region operations are protected with a cs.
@ -171,12 +171,31 @@ static WAKER: AtomicWaker = AtomicWaker::new();
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479))]
pub fn set_default_layout() {
unsafe { crate::pac::FLASH.optcr().modify(|r| r.set_db1m(false)) };
unsafe {
pac::FLASH.optkeyr().write(|w| w.set_optkey(0x08192A3B));
pac::FLASH.optkeyr().write(|w| w.set_optkey(0x4C5D6E7F));
pac::FLASH.optcr().modify(|r| {
r.set_db1m(false);
r.set_optlock(true)
});
};
}
#[cfg(not(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479)))]
pub const fn set_default_layout() {}
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479))]
fn set_alt_layout() {
unsafe {
pac::FLASH.optkeyr().write(|w| w.set_optkey(0x08192A3B));
pac::FLASH.optkeyr().write(|w| w.set_optkey(0x4C5D6E7F));
pac::FLASH.optcr().modify(|r| {
r.set_db1m(true);
r.set_optlock(true)
});
};
}
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479))]
pub fn get_flash_regions() -> &'static [&'static FlashRegion] {
if unsafe { pac::FLASH.optcr().read().db1m() } {
@ -207,8 +226,8 @@ pub(crate) unsafe fn lock() {
}
pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_key(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF_89AB));
pac::FLASH.keyr().write(|w| w.set_key(0x45670123));
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF89AB));
}
#[cfg(feature = "nightly")]