Merge #1297

1297: feat(stm32): Support multiple flash regions r=Dirbaio a=rmja

This depends on https://github.com/embassy-rs/stm32-data/pull/176

This is a general overhaul of the flash module to support multiple erase sizes.
Overall this PR contains:
* Move complex sector computation to embassy-hal-common to allow for tests
* Implement `FlashRegion` trait for each available flash region
* Add Flash::into_regions() to get each region.
* Implement embedded-storage traits for each region to support different erase sizes
* Split family write operations into begin/do/end
* Protection against simultaneous writes/erases for each split region is done through a global mutex

Co-authored-by: Rasmus Melchior Jacobsen <[email protected]>
Co-authored-by: Dario Nieuwenhuis <[email protected]>

1 files changed, 4 insertions, 3 deletions

diff --git a/examples/boot/bootloader/stm32/src/main.rs b/examples/boot/bootloader/stm32/src/main.rs
index b8027d19a..49c21920b 100644
--- a/examples/boot/bootloader/stm32/src/main.rs
+++ b/examples/boot/bootloader/stm32/src/main.rs
@@ -5,7 +5,7 @@ use cortex_m_rt::{entry, exception};
 #[cfg(feature = "defmt")]
 use defmt_rtt as _;
 use embassy_boot_stm32::*;
-use embassy_stm32::flash::{Flash, ERASE_SIZE};
+use embassy_stm32::flash::Flash;
 
 #[entry]
 fn main() -> ! {
@@ -19,9 +19,10 @@ fn main() -> ! {
         }
     */
 
-    let mut bl: BootLoader<ERASE_SIZE> = BootLoader::default();
+    let mut bl: BootLoader<2048> = BootLoader::default();
     let flash = Flash::new(p.FLASH);
-    let mut flash = BootFlash::new(flash);
+    let layout = flash.into_regions();
+    let mut flash = BootFlash::new(layout.bank1_region);
     let start = bl.prepare(&mut SingleFlashConfig::new(&mut flash));
     core::mem::drop(flash);
     unsafe { bl.load(start) }