227 lines
8.3 KiB
Rust
227 lines
8.3 KiB
Rust
use core::ptr::write_volatile;
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use core::sync::atomic::{fence, Ordering};
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use super::{FlashSector, WRITE_SIZE};
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use crate::flash::Error;
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use crate::pac;
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impl FlashSector {
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const fn snb(&self) -> u8 {
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((self.bank as u8) << 4) + self.index_in_bank
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}
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}
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pub(crate) unsafe fn lock() {
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pac::FLASH.cr().modify(|w| w.set_lock(true));
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}
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pub(crate) unsafe fn unlock() {
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if pac::FLASH.cr().read().lock() {
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pac::FLASH.keyr().write_value(0x4567_0123);
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pac::FLASH.keyr().write_value(0xCDEF_89AB);
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}
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}
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pub(crate) unsafe fn enable_blocking_write() {
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assert_eq!(0, WRITE_SIZE % 4);
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pac::FLASH.cr().write(|w| {
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w.set_pg(true);
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w.set_psize(pac::flash::vals::Psize::PSIZE32);
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});
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}
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pub(crate) unsafe fn disable_blocking_write() {
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pac::FLASH.cr().write(|w| w.set_pg(false));
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}
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pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE]) -> Result<(), Error> {
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let mut address = start_address;
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for val in buf.chunks(4) {
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write_volatile(address as *mut u32, u32::from_le_bytes(unwrap!(val.try_into())));
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address += val.len() as u32;
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// prevents parallelism errors
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fence(Ordering::SeqCst);
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}
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blocking_wait_ready()
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}
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pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> {
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pac::FLASH.cr().modify(|w| {
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w.set_ser(true);
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w.set_snb(sector.snb())
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});
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pac::FLASH.cr().modify(|w| {
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w.set_strt(true);
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});
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let ret: Result<(), Error> = blocking_wait_ready();
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pac::FLASH.cr().modify(|w| w.set_ser(false));
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clear_all_err();
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ret
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}
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pub(crate) unsafe fn clear_all_err() {
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// read and write back the same value.
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// This clears all "write 1 to clear" bits.
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pac::FLASH.sr().modify(|_| {});
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}
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unsafe fn blocking_wait_ready() -> Result<(), Error> {
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loop {
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let sr = pac::FLASH.sr().read();
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if !sr.bsy() {
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if sr.erserr() {
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return Err(Error::Seq);
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}
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if sr.pgperr() {
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return Err(Error::Parallelism);
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}
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if sr.pgaerr() {
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return Err(Error::Unaligned);
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}
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if sr.wrperr() {
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return Err(Error::Protected);
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}
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return Ok(());
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::flash::{get_sector, FlashBank};
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#[test]
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#[cfg(stm32f732)]
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fn can_get_sector() {
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const SMALL_SECTOR_SIZE: u32 = 16 * 1024;
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const MEDIUM_SECTOR_SIZE: u32 = 64 * 1024;
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const LARGE_SECTOR_SIZE: u32 = 128 * 1024;
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let assert_sector = |index_in_bank: u8, start: u32, size: u32, address: u32| {
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assert_eq!(
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FlashSector {
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bank: FlashBank::Bank1,
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index_in_bank,
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start,
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size
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},
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get_sector(address, crate::flash::get_flash_regions())
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)
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};
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_0000);
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_3FFF);
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assert_sector(3, 0x0800_C000, SMALL_SECTOR_SIZE, 0x0800_C000);
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assert_sector(3, 0x0800_C000, SMALL_SECTOR_SIZE, 0x0800_FFFF);
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assert_sector(4, 0x0801_0000, MEDIUM_SECTOR_SIZE, 0x0801_0000);
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assert_sector(4, 0x0801_0000, MEDIUM_SECTOR_SIZE, 0x0801_FFFF);
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assert_sector(5, 0x0802_0000, LARGE_SECTOR_SIZE, 0x0802_0000);
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assert_sector(5, 0x0802_0000, LARGE_SECTOR_SIZE, 0x0803_FFFF);
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assert_sector(7, 0x0806_0000, LARGE_SECTOR_SIZE, 0x0806_0000);
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assert_sector(7, 0x0806_0000, LARGE_SECTOR_SIZE, 0x0807_FFFF);
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}
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#[test]
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#[cfg(all(stm32f769, feature = "single-bank"))]
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fn can_get_sector() {
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const SMALL_SECTOR_SIZE: u32 = 32 * 1024;
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const MEDIUM_SECTOR_SIZE: u32 = 128 * 1024;
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const LARGE_SECTOR_SIZE: u32 = 256 * 1024;
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let assert_sector = |index_in_bank: u8, start: u32, size: u32, address: u32| {
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assert_eq!(
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FlashSector {
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bank: FlashBank::Bank1,
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index_in_bank,
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start,
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size
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},
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get_sector(address, crate::flash::get_flash_regions())
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)
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};
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_0000);
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_7FFF);
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assert_sector(3, 0x0801_8000, SMALL_SECTOR_SIZE, 0x0801_8000);
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assert_sector(3, 0x0801_8000, SMALL_SECTOR_SIZE, 0x0801_FFFF);
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assert_sector(4, 0x0802_0000, MEDIUM_SECTOR_SIZE, 0x0802_0000);
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assert_sector(4, 0x0802_0000, MEDIUM_SECTOR_SIZE, 0x0803_FFFF);
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assert_sector(5, 0x0804_0000, LARGE_SECTOR_SIZE, 0x0804_0000);
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assert_sector(5, 0x0804_0000, LARGE_SECTOR_SIZE, 0x0807_FFFF);
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assert_sector(7, 0x080C_0000, LARGE_SECTOR_SIZE, 0x080C_0000);
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assert_sector(7, 0x080C_0000, LARGE_SECTOR_SIZE, 0x080F_FFFF);
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}
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#[test]
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#[cfg(all(stm32f769, feature = "dual-bank"))]
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fn can_get_sector() {
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const SMALL_SECTOR_SIZE: u32 = 16 * 1024;
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const MEDIUM_SECTOR_SIZE: u32 = 64 * 1024;
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const LARGE_SECTOR_SIZE: u32 = 128 * 1024;
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let assert_sector = |index_in_bank: u8, start: u32, size: u32, address: u32, snb: u8, bank: FlashBank| {
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assert_eq!(
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FlashSector {
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bank: bank,
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index_in_bank,
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start,
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size
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},
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get_sector(address, crate::flash::get_flash_regions())
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);
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assert_eq!(get_sector(address, crate::flash::get_flash_regions()).snb(), snb);
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};
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_0000, 0x00, FlashBank::Bank1);
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assert_sector(0, 0x0800_0000, SMALL_SECTOR_SIZE, 0x0800_3FFF, 0x00, FlashBank::Bank1);
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assert_sector(3, 0x0800_C000, SMALL_SECTOR_SIZE, 0x0800_C000, 0x03, FlashBank::Bank1);
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assert_sector(3, 0x0800_C000, SMALL_SECTOR_SIZE, 0x0800_FFFF, 0x03, FlashBank::Bank1);
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assert_sector(4, 0x0801_0000, MEDIUM_SECTOR_SIZE, 0x0801_0000, 0x04, FlashBank::Bank1);
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assert_sector(4, 0x0801_0000, MEDIUM_SECTOR_SIZE, 0x0801_FFFF, 0x04, FlashBank::Bank1);
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assert_sector(5, 0x0802_0000, LARGE_SECTOR_SIZE, 0x0802_0000, 0x05, FlashBank::Bank1);
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assert_sector(5, 0x0802_0000, LARGE_SECTOR_SIZE, 0x0803_FFFF, 0x05, FlashBank::Bank1);
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assert_sector(10, 0x080C_0000, LARGE_SECTOR_SIZE, 0x080C_0000, 0x0A, FlashBank::Bank1);
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assert_sector(10, 0x080C_0000, LARGE_SECTOR_SIZE, 0x080D_FFFF, 0x0A, FlashBank::Bank1);
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assert_sector(0, 0x0810_0000, SMALL_SECTOR_SIZE, 0x0810_0000, 0x10, FlashBank::Bank2);
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assert_sector(0, 0x0810_0000, SMALL_SECTOR_SIZE, 0x0810_3FFF, 0x10, FlashBank::Bank2);
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assert_sector(3, 0x0810_C000, SMALL_SECTOR_SIZE, 0x0810_C000, 0x13, FlashBank::Bank2);
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assert_sector(3, 0x0810_C000, SMALL_SECTOR_SIZE, 0x0810_FFFF, 0x13, FlashBank::Bank2);
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assert_sector(4, 0x0811_0000, MEDIUM_SECTOR_SIZE, 0x0811_0000, 0x14, FlashBank::Bank2);
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assert_sector(4, 0x0811_0000, MEDIUM_SECTOR_SIZE, 0x0811_FFFF, 0x14, FlashBank::Bank2);
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assert_sector(5, 0x0812_0000, LARGE_SECTOR_SIZE, 0x0812_0000, 0x15, FlashBank::Bank2);
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assert_sector(5, 0x0812_0000, LARGE_SECTOR_SIZE, 0x0813_FFFF, 0x15, FlashBank::Bank2);
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assert_sector(10, 0x081C_0000, LARGE_SECTOR_SIZE, 0x081C_0000, 0x1A, FlashBank::Bank2);
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assert_sector(10, 0x081C_0000, LARGE_SECTOR_SIZE, 0x081D_FFFF, 0x1A, FlashBank::Bank2);
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}
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}
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#[cfg(all(bank_setup_configurable))]
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pub(crate) fn check_bank_setup() {
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if cfg!(feature = "single-bank") && !pac::FLASH.optcr().read().n_dbank() {
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panic!("Embassy is configured as single-bank, but the hardware is running in dual-bank mode. Change the hardware by changing the ndbank value in the user option bytes or configure embassy to use dual-bank config");
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}
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if cfg!(feature = "dual-bank") && pac::FLASH.optcr().read().n_dbank() {
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panic!("Embassy is configured as dual-bank, but the hardware is running in single-bank mode. Change the hardware by changing the ndbank value in the user option bytes or configure embassy to use single-bank config");
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}
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}
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