save tests

Software/MainBoard/rust/src/hal/v4_hal.rs

@@ -577,9 +577,9 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
                 start
             );
             to_write -= part.len();
-            chunk += 1;
             self.get_rtc_module()
                 .write((BACKUP_HEADER_MAX_SIZE + chunk * EEPROM_PAGE) as u32, part)?;
+            chunk += 1;
         }
         info!("Backup complete");
         self.clear_progress().await;
@@ -591,13 +591,19 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
         let mut store = alloc::vec![0_u8; info.size as usize];
         self.rtc_module
             .read(BACKUP_HEADER_MAX_SIZE as u32, store.as_mut_slice())?;
+        info!("Read backup data of size {}", store.len());
         let mut checksum = X25.digest();
+        info!("Calculating CRC");
         checksum.update(&store[..]);
         let crc = checksum.finalize();
+        info!("CRC is {:04x}", crc);
         if crc != info.crc16 {
+            warn!("CRC mismatch in backup data");
             bail!("CRC mismatch in backup data")
         }
+        info!("CRC is correct");
         let (decoded, _) = bincode::decode_from_slice(&store[..], CONFIG)?;
+        info!("Backup data decoded");
         Ok(decoded)
     }