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Add runtime checks for errata 2.2.11

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This commit is contained in:
Rasmus Melchior Jacobsen 2023-05-25 20:55:12 +02:00
parent 8073bf22e9
commit b412784a7a
2 changed files with 75 additions and 1 deletions
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3
embassy-stm32/src/flash/common.rs
View file

@ -85,6 +85,9 @@ pub(super) fn read_blocking(base: u32, size: u32, offset: u32, bytes: &mut [u8])
return Err(Error::Size);
}
#[cfg(flash_f4)]
family::assert_not_corrupted_read();
let start_address = base + offset;
let flash_data = unsafe { core::slice::from_raw_parts(start_address as *const u8, bytes.len()) };
bytes.copy_from_slice(flash_data);

73
embassy-stm32/src/flash/f4.rs
View file

@ -380,6 +380,77 @@ fn get_result(sr: Sr) -> Result<(), Error> {
}
}
pub(crate) fn assert_not_corrupted_read() {
#[allow(unused)]
const REVISION_3: u16 = 0x2001;
#[cfg(any(
feature = "stm32f427ai",
feature = "stm32f427ii",
feature = "stm32f427vi",
feature = "stm32f427zi",
feature = "stm32f429ai",
feature = "stm32f429bi",
feature = "stm32f429ii",
feature = "stm32f429ni",
feature = "stm32f429vi",
feature = "stm32f429zi",
feature = "stm32f437ai",
feature = "stm32f437ii",
feature = "stm32f437vi",
feature = "stm32f437zi",
feature = "stm32f439ai",
feature = "stm32f439bi",
feature = "stm32f439ii",
feature = "stm32f439ni",
feature = "stm32f439vi",
feature = "stm32f439zi",
))]
if unsafe { pac::DBGMCU.idcode().read().rev_id() < REVISION_3 && pa12_is_output_pull_low() } {
panic!("Read corruption for stm32f42xxI and stm32f43xxI when PA12 is in use for chips below revision 3, see errata 2.2.11");
}
#[cfg(any(
feature = "stm32f427ag",
feature = "stm32f427ig",
feature = "stm32f427vg",
feature = "stm32f427zg",
feature = "stm32f429ag",
feature = "stm32f429bg",
feature = "stm32f429ig",
feature = "stm32f429ng",
feature = "stm32f429vg",
feature = "stm32f429zg",
feature = "stm32f437ig",
feature = "stm32f437vg",
feature = "stm32f437zg",
feature = "stm32f439bg",
feature = "stm32f439ig",
feature = "stm32f439ng",
feature = "stm32f439vg",
feature = "stm32f439zg",
))]
if unsafe {
pac::FLASH.optcr().read().db1m()
&& pac::DBGMCU.idcode().read().rev_id() < REVISION_3
&& pa12_is_output_pull_low()
} {
panic!("Read corruption for stm32f42xxG and stm32f43xxG in dual bank mode when PA12 is in use for chips below revision 3, see errata 2.2.11");
}
}
#[allow(unused)]
fn pa12_is_output_pull_low() -> bool {
use pac::gpio::vals;
use pac::GPIOA;
const PIN: usize = 12;
unsafe {
GPIOA.moder().read().moder(PIN) == vals::Moder::OUTPUT
&& GPIOA.pupdr().read().pupdr(PIN) == vals::Pupdr::PULLDOWN
&& GPIOA.odr().read().odr(PIN) == vals::Odr::LOW
}
}
#[cfg(test)]
mod tests {
use super::*;
@ -387,7 +458,7 @@ mod tests {
#[test]
#[cfg(stm32f429)]
fn can_get_sector_single_bank() {
fn can_get_sector() {
const SMALL_SECTOR_SIZE: u32 = 16 * 1024;
const MEDIUM_SECTOR_SIZE: u32 = 64 * 1024;
const LARGE_SECTOR_SIZE: u32 = 128 * 1024;