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stm32 flash: check lock bit before unlocking

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It hardfaults if already unlocked flash is unlocked again.
This commit is contained in:
Andres Vahter 2023-10-10 12:48:21 +03:00
parent 904f1cfc7a
commit 3616d68aaa
7 changed files with 40 additions and 20 deletions
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6
embassy-stm32/src/flash/f0.rs
View File

@ -19,8 +19,10 @@ pub(crate) unsafe fn lock() {
} }
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_fkeyr(0x4567_0123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_fkeyr(0xCDEF_89AB)); pac::FLASH.keyr().write(|w| w.set_fkeyr(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_fkeyr(0xCDEF_89AB));
}
} }
pub(crate) unsafe fn enable_blocking_write() { pub(crate) unsafe fn enable_blocking_write() {

6
embassy-stm32/src/flash/f3.rs
View File

@ -19,8 +19,10 @@ pub(crate) unsafe fn lock() {
} }
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_fkeyr(0x4567_0123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_fkeyr(0xCDEF_89AB)); pac::FLASH.keyr().write(|w| w.set_fkeyr(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_fkeyr(0xCDEF_89AB));
}
} }
pub(crate) unsafe fn enable_blocking_write() { pub(crate) unsafe fn enable_blocking_write() {

6
embassy-stm32/src/flash/f4.rs
View File

@ -228,8 +228,10 @@ pub(crate) unsafe fn lock() {
} }
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_key(0x45670123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF89AB)); pac::FLASH.keyr().write(|w| w.set_key(0x45670123));
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF89AB));
}
} }
pub(crate) unsafe fn enable_write() { pub(crate) unsafe fn enable_write() {

6
embassy-stm32/src/flash/f7.rs
View File

@ -19,8 +19,10 @@ pub(crate) unsafe fn lock() {
} }
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_key(0x4567_0123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF_89AB)); pac::FLASH.keyr().write(|w| w.set_key(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_key(0xCDEF_89AB));
}
} }
pub(crate) unsafe fn enable_blocking_write() { pub(crate) unsafe fn enable_blocking_write() {

6
embassy-stm32/src/flash/g0.rs
View File

@ -24,8 +24,10 @@ pub(crate) unsafe fn unlock() {
while pac::FLASH.sr().read().bsy() {} while pac::FLASH.sr().read().bsy() {}
// Unlock flash // Unlock flash
pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB)); pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB));
}
} }
pub(crate) unsafe fn enable_blocking_write() { pub(crate) unsafe fn enable_blocking_write() {

12
embassy-stm32/src/flash/h7.rs
View File

@ -26,11 +26,15 @@ pub(crate) unsafe fn lock() {
} }
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
pac::FLASH.bank(0).keyr().write(|w| w.set_keyr(0x4567_0123)); if pac::FLASH.bank(0).cr().read().lock() {
pac::FLASH.bank(0).keyr().write(|w| w.set_keyr(0xCDEF_89AB)); pac::FLASH.bank(0).keyr().write(|w| w.set_keyr(0x4567_0123));
pac::FLASH.bank(0).keyr().write(|w| w.set_keyr(0xCDEF_89AB));
}
if is_dual_bank() { if is_dual_bank() {
pac::FLASH.bank(1).keyr().write(|w| w.set_keyr(0x4567_0123)); if pac::FLASH.bank(1).cr().read().lock() {
pac::FLASH.bank(1).keyr().write(|w| w.set_keyr(0xCDEF_89AB)); pac::FLASH.bank(1).keyr().write(|w| w.set_keyr(0x4567_0123));
pac::FLASH.bank(1).keyr().write(|w| w.set_keyr(0xCDEF_89AB));
}
} }
} }

18
embassy-stm32/src/flash/l.rs
View File

@ -28,17 +28,23 @@ pub(crate) unsafe fn lock() {
pub(crate) unsafe fn unlock() { pub(crate) unsafe fn unlock() {
#[cfg(any(flash_wl, flash_wb, flash_l4))] #[cfg(any(flash_wl, flash_wb, flash_l4))]
{ {
pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123)); if pac::FLASH.cr().read().lock() {
pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB)); pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123));
pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB));
}
} }
#[cfg(any(flash_l0, flash_l1))] #[cfg(any(flash_l0, flash_l1))]
{ {
pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x89ABCDEF)); if pac::FLASH.pecr().read().pelock() {
pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x02030405)); pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x89ABCDEF));
pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x02030405));
}
pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x8C9DAEBF)); if pac::FLASH.pecr().read().prglock() {
pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x13141516)); pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x8C9DAEBF));
pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x13141516));
}
} }
} }