Make type conversions explicit

src/ds323x/datetime.rs

@@ -229,10 +229,10 @@ fn year_from_registers(month: u8, year: u8) -> u16 {
     let century = month & BitFlags::CENTURY;
     let year = packed_bcd_to_decimal(year);
     if century != 0 {
-        2100 + (year as u16)
+        2100 + u16::from(year)
     }
     else {
-        2000 + (year as u16)
+        2000 + u16::from(year)
     }
 }
 

src/ds323x/status.rs

@@ -83,13 +83,13 @@ where
         let mut data = [Register::TEMP_MSB, 0, 0];
         self.iface.read_data(&mut data)?;
         let is_negative = (data[1] & 0b1000_0000) != 0;
-        let temp = ((data[1] as u16) << 2) | (data[2] >> 6) as u16;
+        let temp = (u16::from(data[1]) << 2) | u16::from(data[2] >> 6);
         if is_negative {
             let temp_sign_extended = temp | 0b1111_1100_0000_0000;
-            Ok(temp_sign_extended as i16 as f32 * 0.25)
+            Ok(f32::from(temp_sign_extended as i16) * 0.25)
         }
         else {
-            Ok(temp as f32 * 0.25)
+            Ok(f32::from(temp) * 0.25)
         }
     }
 }