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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 6efcc9acaa
commit b2775fc90c
11 changed files with 547 additions and 194 deletions
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18
embassy-stm32/src/flash/f0.rs
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@ -13,6 +13,10 @@ pub const fn get_flash_regions() -> &'static [&'static FlashRegion] {
&FLASH_REGIONS
}
pub(crate) unsafe fn on_interrupt(_: *mut ()) {
unimplemented!();
}
pub(crate) unsafe fn lock() {
pac::FLASH.cr().modify(|w| w.set_lock(true));
}
@ -22,17 +26,17 @@ pub(crate) unsafe fn unlock() {
pac::FLASH.keyr().write(|w| w.set_fkeyr(0xCDEF_89AB));
}
pub(crate) unsafe fn begin_write() {
pub(crate) unsafe fn enable_blocking_write() {
assert_eq!(0, WRITE_SIZE % 2);
pac::FLASH.cr().write(|w| w.set_pg(true));
}
pub(crate) unsafe fn end_write() {
pub(crate) unsafe fn disable_blocking_write() {
pac::FLASH.cr().write(|w| w.set_pg(false));
}
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> {
let mut address = start_address;
for chunk in buf.chunks(2) {
write_volatile(address as *mut u16, u16::from_le_bytes(chunk.try_into().unwrap()));
@ -42,10 +46,10 @@ pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE])
fence(Ordering::SeqCst);
}
blocking_wait_ready()
wait_ready_blocking()
}
pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> {
pub(crate) unsafe fn erase_sector_blocking(sector: &FlashSector) -> Result<(), Error> {
pac::FLASH.cr().modify(|w| {
w.set_per(true);
});
@ -56,7 +60,7 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
w.set_strt(true);
});
let mut ret: Result<(), Error> = blocking_wait_ready();
let mut ret: Result<(), Error> = wait_ready_blocking();
if !pac::FLASH.sr().read().eop() {
trace!("FLASH: EOP not set");
@ -88,7 +92,7 @@ pub(crate) unsafe fn clear_all_err() {
});
}
unsafe fn blocking_wait_ready() -> Result<(), Error> {
unsafe fn wait_ready_blocking() -> Result<(), Error> {
loop {
let sr = pac::FLASH.sr().read();