backup info and read

rust/src/plant_hal.rs

@@ -206,9 +206,9 @@ pub struct BatteryState {
 
 #[derive(Serialize, Deserialize, PartialEq, Debug)]
 pub struct BackupHeader{
-    timestamp: i64,
+    pub timestamp: i64,
     crc16: u16,
-    size: usize
+    pub size: usize
 }
 
 impl PlantCtrlBoard<'_> {
@@ -227,6 +227,25 @@ impl PlantCtrlBoard<'_> {
         };
     }
 
+    pub fn get_backup_info(&mut self) -> Result<BackupHeader> {
+        let dummy = BackupHeader{
+            timestamp: 0,
+            crc16: 0,
+            size: 0,
+        };
+        let store = bincode::serialize(&dummy)?.len();
+        let mut header_page_buffer = vec![0_u8; store];
+
+        match self.eeprom.read_data(0, &mut header_page_buffer) {
+            OkStd(_) => {},
+            Err(err) => bail!("Error reading eeprom header {:?}", err),
+        };
+        println!("Raw header is {:?} with size {}", header_page_buffer , store);
+        let header:BackupHeader = bincode::deserialize(&header_page_buffer)?;
+        Ok(header)
+    }
+
+
     pub fn get_backup_config(&mut self) -> Result<Vec<u8>> {
         let dummy = BackupHeader{
             timestamp: 0,