diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index ca55681f..393efc42 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -111,7 +111,7 @@ fn main() {
         .iter()
         .filter(|x| x.kind == MemoryRegionKind::Flash && x.settings.is_some());
     for region in flash_memory_regions.clone() {
-        let region_name = format_ident!("{}", region.name.replace("_", ""));
+        let region_name = format_ident!("{}", get_flash_region_name(region.name));
         let base = region.address as usize;
         let size = region.size as usize;
         let settings = region.settings.as_ref().unwrap();
@@ -120,6 +120,7 @@ fn main() {
         let erase_value = settings.erase_value;
 
         flash_regions.extend(quote! {
+            #[allow(non_camel_case_types)]
             pub struct #region_name(());
         });
 
@@ -136,9 +137,9 @@ fn main() {
 
     let (fields, inits): (Vec<TokenStream>, Vec<TokenStream>) = flash_memory_regions
         .map(|f| {
-            let trimmed_name = f.name.replace("_", "");
-            let field_name = format_ident!("{}", trimmed_name.to_lowercase());
-            let field_type = format_ident!("{}", trimmed_name);
+            let region_name = get_flash_region_name(f.name);
+            let field_name = format_ident!("{}", region_name.to_lowercase());
+            let field_type = format_ident!("{}", region_name);
             let field = quote! {
                 pub #field_name: #field_type
             };
@@ -633,7 +634,7 @@ fn main() {
         .filter(|m| m.kind == MemoryRegionKind::Flash && m.settings.is_some())
     {
         let mut row = Vec::new();
-        row.push(m.name.replace("_", ""));
+        row.push(get_flash_region_name(m.name));
         flash_regions_table.push(row);
     }
 
@@ -886,3 +887,7 @@ macro_rules! {} {{
     )
     .unwrap();
 }
+
+fn get_flash_region_name(name: &str) -> String {
+    name.replace("BANK_", "BANK").replace("REGION_", "REGION")
+}
diff --git a/embassy-stm32/src/flash/f3.rs b/embassy-stm32/src/flash/f3.rs
index 294fcffc..b24dfb4a 100644
--- a/embassy-stm32/src/flash/f3.rs
+++ b/embassy-stm32/src/flash/f3.rs
@@ -6,8 +6,8 @@ use super::FlashRegion;
 use crate::flash::Error;
 use crate::pac;
 
-pub(crate) const MAX_WRITE_SIZE: usize = super::MAINA::WRITE_SIZE;
-pub(crate) const MAX_ERASE_SIZE: usize = super::MAINA::ERASE_SIZE;
+pub(crate) const MAX_WRITE_SIZE: usize = super::BANK1::WRITE_SIZE;
+pub(crate) const MAX_ERASE_SIZE: usize = super::BANK1::ERASE_SIZE;
 
 pub(crate) unsafe fn lock() {
     pac::FLASH.cr().modify(|w| w.set_lock(true));
diff --git a/embassy-stm32/src/flash/f4.rs b/embassy-stm32/src/flash/f4.rs
index d739c46b..0d9d405b 100644
--- a/embassy-stm32/src/flash/f4.rs
+++ b/embassy-stm32/src/flash/f4.rs
@@ -5,12 +5,12 @@ use core::sync::atomic::{fence, Ordering};
 
 use embassy_hal_common::stm32::flash::f4::{get_sector, SECOND_BANK_SECTOR_OFFSET};
 
-use super::{FlashRegion, FLASH_SIZE, MAINC};
+use super::{FlashRegion, FLASH_SIZE};
 use crate::flash::Error;
 use crate::pac;
 
-pub(crate) const MAX_WRITE_SIZE: usize = MAINC::WRITE_SIZE;
-pub(crate) const MAX_ERASE_SIZE: usize = MAINC::ERASE_SIZE;
+pub(crate) const MAX_WRITE_SIZE: usize = super::BANK1_REGION3::WRITE_SIZE;
+pub(crate) const MAX_ERASE_SIZE: usize = super::BANK1_REGION3::ERASE_SIZE;
 
 unsafe fn is_dual_bank() -> bool {
     match FLASH_SIZE / 1024 {
@@ -46,13 +46,13 @@ pub(crate) unsafe fn blocking_write(first_address: u32, buf: &[u8]) -> Result<()
 
     let ret = {
         let mut ret: Result<(), Error> = Ok(());
-        let mut offset = first_address;
+        let mut address = first_address;
         for chunk in buf.chunks(MAX_WRITE_SIZE) {
             let vals = chunk.chunks_exact(size_of::<u32>());
             assert!(vals.remainder().is_empty());
             for val in vals {
-                write_volatile(offset as *mut u32, u32::from_le_bytes(val.try_into().unwrap()));
-                offset += val.len() as u32;
+                write_volatile(address as *mut u32, u32::from_le_bytes(val.try_into().unwrap()));
+                address += val.len() as u32;
 
                 // prevents parallelism errors
                 fence(Ordering::SeqCst);
diff --git a/embassy-stm32/src/flash/f7.rs b/embassy-stm32/src/flash/f7.rs
index ee0513fa..8b8076e0 100644
--- a/embassy-stm32/src/flash/f7.rs
+++ b/embassy-stm32/src/flash/f7.rs
@@ -9,8 +9,8 @@ use super::FlashRegion;
 use crate::flash::Error;
 use crate::pac;
 
-pub(crate) const MAX_WRITE_SIZE: usize = super::MAINC::WRITE_SIZE;
-pub(crate) const MAX_ERASE_SIZE: usize = super::MAINC::ERASE_SIZE;
+pub(crate) const MAX_WRITE_SIZE: usize = super::BANK1_REGION3::WRITE_SIZE;
+pub(crate) const MAX_ERASE_SIZE: usize = super::BANK1_REGION3::ERASE_SIZE;
 
 pub(crate) unsafe fn lock() {
     pac::FLASH.cr().modify(|w| w.set_lock(true));