Ensure RawCard size matches flash alignment requirements, add debug logs

src/card/decoder.rs

@@ -17,6 +17,7 @@ pub fn split_nfc_hex(payload: &[u8]) -> Option<RawCard> {
         packed_card_text: payload[0x2DB..0x311].try_into().ok()?,
         secret: payload[0x311..0x329].try_into().ok()?,
         _opaque_trailer: payload[0x329..0x35A].try_into().ok()?,
+        _padding: Default::default(),
     })
 }
 

src/card/model.rs

@@ -19,8 +19,11 @@ pub struct RawCard {
     pub packed_card_text: [u8; 54],
     pub secret: [u8; 24],
     pub _opaque_trailer: [u8; 49],
+    pub _padding: [u8; 2],
 }
 
+static_assertions::const_assert!(RawCard::SERIALIZED_SIZE.is_multiple_of(4));
+
 #[derive(Debug, Clone, Eq, PartialEq, FromPrimitive)]
 #[repr(u8)]
 pub enum CardType {

src/storage/cardstore.rs

@@ -17,6 +17,17 @@ const COUNT_REGION: MemoryRegion = MemoryRegion {
     size: size_of::<u32>(),
 };
 
+const ALLOCATION_TABLE_REGION: MemoryRegion = MemoryRegion {
+    offset: COUNT_REGION.end() as u32,
+    size: MAX_CARDS * AllocationTableEntry::SERIALIZED_SIZE,
+};
+
+const CARDS_REGION: MemoryRegion = MemoryRegion {
+    offset: ALLOCATION_TABLE_REGION.end() as u32,
+    size: CARDSTORE_REGION.size - ALLOCATION_TABLE_REGION.end(),
+};
+
+
 #[derive(Debug, BinarySerde, PartialEq, Eq, Clone)]
 #[repr(C)]
 pub struct AllocationTableEntry {
@@ -52,16 +63,6 @@ impl AllocationTableEntry {
     }
 }
 
-const ALLOCATION_TABLE_REGION: MemoryRegion = MemoryRegion {
-    offset: COUNT_REGION.end() as u32,
-    size: MAX_CARDS * AllocationTableEntry::SERIALIZED_SIZE,
-};
-
-const CARDS_REGION: MemoryRegion = MemoryRegion {
-    offset: ALLOCATION_TABLE_REGION.end() as u32,
-    size: CARDSTORE_REGION.size - ALLOCATION_TABLE_REGION.end(),
-};
-
 #[derive(Debug)]
 pub enum CardStoreError {
     Store(StoreError),

src/storage/store.rs

@@ -39,6 +39,7 @@ impl Store {
     }
 
     pub fn write(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), StoreError> {
+        log::debug!("Writing {} bytes at offset 0x{offset:08x}", bytes.len());
         self.storage.write(FLASH_ADDR + offset, bytes)
     }
 }