add returncode module

satrs-core/src/resultcode.rs

@@ -1,3 +1,6 @@
+use spacepackets::{ByteConversionError, SizeMissmatch};
+use spacepackets::ecss::{EcssEnumeration, EcssEnumU16};
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub struct ResultU16 {
     group_id: u8,
@@ -22,6 +25,30 @@ impl ResultU16 {
     }
 }
 
+impl From<ResultU16> for EcssEnumU16 {
+    fn from(v: ResultU16) -> Self {
+        EcssEnumU16::new(v.raw())
+    }
+}
+
+impl EcssEnumeration for ResultU16 {
+    fn pfc(&self) -> u8 {
+        16
+    }
+
+    fn write_to_be_bytes(&self, buf: &mut [u8]) -> Result<(), ByteConversionError> {
+        if buf.len() < 2 {
+            return Err(ByteConversionError::ToSliceTooSmall(SizeMissmatch {
+                found: buf.len(),
+                expected: 2
+            }));
+        }
+        buf[0] = self.group_id;
+        buf[1] = self.unique_id;
+        Ok(())
+    }
+}
+
 #[derive(Debug)]
 pub struct ResultU16Ext {
     pub name: &'static str,