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Use non-secure registers for u5 flash

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This commit is contained in:
Warren Campbell 2024-04-15 14:54:01 -04:00
parent 27ba2ad5b0
commit 2fa0bb7d6e
1 changed files with 14 additions and 14 deletions
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28
embassy-stm32/src/flash/u5.rs
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@ -14,26 +14,26 @@ pub(crate) const fn get_flash_regions() -> &'static [&'static FlashRegion] {
}
pub(crate) unsafe fn lock() {
pac::FLASH.seccr().modify(|w| w.set_lock(true));
pac::FLASH.nscr().modify(|w| w.set_lock(true));
}
pub(crate) unsafe fn unlock() {
if pac::FLASH.seccr().read().lock() {
pac::FLASH.seckeyr().write_value(0x4567_0123);
pac::FLASH.seckeyr().write_value(0xCDEF_89AB);
if pac::FLASH.nscr().read().lock() {
pac::FLASH.nskeyr().write_value(0x4567_0123);
pac::FLASH.nskeyr().write_value(0xCDEF_89AB);
}
}
pub(crate) unsafe fn enable_blocking_write() {
assert_eq!(0, WRITE_SIZE % 4);
pac::FLASH.seccr().write(|w| {
w.set_pg(pac::flash::vals::SeccrPg::B_0X1);
pac::FLASH.nscr().write(|w| {
w.set_pg(pac::flash::vals::NscrPg::B_0X1);
});
}
pub(crate) unsafe fn disable_blocking_write() {
pac::FLASH.seccr().write(|w| w.set_pg(pac::flash::vals::SeccrPg::B_0X0));
pac::FLASH.nscr().write(|w| w.set_pg(pac::flash::vals::NscrPg::B_0X0));
}
pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE]) -> Result<(), Error> {
@ -50,19 +50,19 @@ pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE])
}
pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> {
pac::FLASH.seccr().modify(|w| {
w.set_per(pac::flash::vals::SeccrPer::B_0X1);
pac::FLASH.nscr().modify(|w| {
w.set_per(pac::flash::vals::NscrPer::B_0X1);
w.set_pnb(sector.index_in_bank)
});
pac::FLASH.seccr().modify(|w| {
pac::FLASH.nscr().modify(|w| {
w.set_strt(true);
});
let ret: Result<(), Error> = blocking_wait_ready();
pac::FLASH
.seccr()
.modify(|w| w.set_per(pac::flash::vals::SeccrPer::B_0X0));
.nscr()
.modify(|w| w.set_per(pac::flash::vals::NscrPer::B_0X0));
clear_all_err();
ret
}
@ -70,12 +70,12 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
pub(crate) unsafe fn clear_all_err() {
// read and write back the same value.
// This clears all "write 1 to clear" bits.
pac::FLASH.secsr().modify(|_| {});
pac::FLASH.nssr().modify(|_| {});
}
unsafe fn blocking_wait_ready() -> Result<(), Error> {
loop {
let sr = pac::FLASH.secsr().read();
let sr = pac::FLASH.nssr().read();
if !sr.bsy() {
if sr.pgserr() {