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stm32: Add async flash write/erase to f4

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This commit is contained in:
Rasmus Melchior Jacobsen
2023-05-24 12:17:12 +02:00
parent 06f5c309c0
commit 0e90e98e9b
11 changed files with 547 additions and 194 deletions
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21
embassy-stm32/src/flash/h7.rs
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@ -17,6 +17,10 @@ pub fn get_flash_regions() -> &'static [&'static FlashRegion] {
&FLASH_REGIONS
}
pub(crate) unsafe fn on_interrupt(_: *mut ()) {
unimplemented!();
}
pub(crate) unsafe fn lock() {
pac::FLASH.bank(0).cr().modify(|w| w.set_lock(true));
if is_dual_bank() {
@ -33,13 +37,13 @@ pub(crate) unsafe fn unlock() {
}
}
pub(crate) unsafe fn begin_write() {
pub(crate) unsafe fn enable_blocking_write() {
assert_eq!(0, WRITE_SIZE % 4);
}
pub(crate) unsafe fn end_write() {}
pub(crate) unsafe fn disable_blocking_write() {}
pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE]) -> Result<(), Error> {
pub(crate) unsafe fn write_blocking(start_address: u32, buf: &[u8; WRITE_SIZE]) -> Result<(), Error> {
// We cannot have the write setup sequence in begin_write as it depends on the address
let bank = if start_address < BANK1_REGION.end() {
pac::FLASH.bank(0)
@ -60,7 +64,7 @@ pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE])
write_volatile(address as *mut u32, u32::from_le_bytes(val.try_into().unwrap()));
address += val.len() as u32;
res = Some(blocking_wait_ready(bank));
res = Some(wait_ready_blocking(bank));
bank.sr().modify(|w| {
if w.eop() {
w.set_eop(true);
@ -80,7 +84,7 @@ pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE])
res.unwrap()
}
pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> {
pub(crate) unsafe fn erase_sector_blocking(sector: &FlashSector) -> Result<(), Error> {
let bank = pac::FLASH.bank(sector.bank as usize);
bank.cr().modify(|w| {
w.set_ser(true);
@ -91,12 +95,9 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
w.set_start(true);
});
let ret: Result<(), Error> = blocking_wait_ready(bank);
let ret: Result<(), Error> = wait_ready_blocking(bank);
bank.cr().modify(|w| w.set_ser(false));
bank_clear_all_err(bank);
ret
}
@ -141,7 +142,7 @@ unsafe fn bank_clear_all_err(bank: pac::flash::Bank) {
});
}
unsafe fn blocking_wait_ready(bank: pac::flash::Bank) -> Result<(), Error> {
unsafe fn wait_ready_blocking(bank: pac::flash::Bank) -> Result<(), Error> {
loop {
let sr = bank.sr().read();