Let flash module be conditionally included

embassy-stm32/build.rs

@@ -162,11 +162,13 @@ fn main() {
 
     let regions_len = flash_memory_regions.len();
     flash_regions.extend(quote! {
+        #[cfg(flash)]
         pub struct FlashRegions<'d> {
             _inner: embassy_hal_common::PeripheralRef<'d, crate::peripherals::FLASH>,
             #(#fields),*
         }
 
+        #[cfg(flash)]
         impl<'d> FlashRegions<'d> {
             pub(crate) const fn new(p: embassy_hal_common::PeripheralRef<'d, crate::peripherals::FLASH>) -> Self {
                 Self {

embassy-stm32/src/flash/l.rs

@@ -6,8 +6,6 @@ use super::{FlashRegion, FlashSector, BANK1, WRITE_SIZE};
 use crate::flash::Error;
 use crate::pac;
 
-const ERASE_SIZE: usize = BANK1::SETTINGS.erase_size;
-
 pub(crate) unsafe fn lock() {
     #[cfg(any(flash_wl, flash_wb, flash_l4))]
     pac::FLASH.cr().modify(|w| w.set_lock(true));
@@ -75,7 +73,7 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
 
     #[cfg(any(flash_wl, flash_wb, flash_l4))]
     {
-        let idx = (sector.start - super::FLASH_BASE as u32) / ERASE_SIZE as u32;
+        let idx = (sector.start - super::FLASH_BASE as u32) / BANK1::SETTINGS.erase_size as u32;
 
         #[cfg(flash_l4)]
         let (idx, bank) = if idx > 255 { (idx - 256, true) } else { (idx, false) };

embassy-stm32/src/flash/other.rs

@@ -1,11 +0,0 @@
-pub trait FlashRegion {
-    const SETTINGS: FlashRegionSettings;
-}
-
-pub struct FlashRegionSettings {
-    pub base: usize,
-    pub size: usize,
-    pub erase_size: usize,
-    pub write_size: usize,
-    pub erase_value: u8,
-}

embassy-stm32/src/lib.rs

@@ -43,17 +43,8 @@ pub mod i2c;
 
 #[cfg(crc)]
 pub mod crc;
-#[cfg(any(
-    flash_l0, flash_l1, flash_wl, flash_wb, flash_l4, flash_f3, flash_f4, flash_f7, flash_h7
-))]
+#[cfg(flash)]
 pub mod flash;
-#[cfg(not(any(
-    flash_l0, flash_l1, flash_wl, flash_wb, flash_l4, flash_f3, flash_f4, flash_f7, flash_h7
-)))]
-pub mod flash {
-    mod other;
-    pub use other::FlashRegion;
-}
 pub mod pwm;
 #[cfg(rng)]
 pub mod rng;