Init spacepackets crate

src/ecss.rs

@@ -0,0 +1,37 @@
+use crate::{CcsdsPacket, PacketError};
+use core::mem::size_of;
+use crc::{Crc, CRC_16_IBM_3740};
+use serde::{Deserialize, Serialize};
+
+/// CRC algorithm used by the PUS standard
+pub const CRC_CCITT_FALSE: Crc<u16> = Crc::<u16>::new(&CRC_16_IBM_3740);
+pub const CCSDS_HEADER_LEN: usize = size_of::<crate::zc::SpHeader>();
+
+/// All PUS versions. Only PUS C is supported by this library
+#[derive(PartialEq, Copy, Clone, Serialize, Deserialize, Debug)]
+pub enum PusVersion {
+    EsaPus = 0,
+    PusA = 1,
+    PusC = 2,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum PusError {
+    VersionNotSupported(PusVersion),
+    IncorrectCrc(u16),
+    RawDataTooShort(usize),
+    NoRawData,
+    /// CRC16 needs to be calculated first
+    CrcCalculationMissing,
+    OtherPacketError(PacketError),
+}
+
+pub trait PusPacket: CcsdsPacket {
+    const PUS_VERSION: PusVersion = PusVersion::PusC;
+
+    fn service(&self) -> u8;
+    fn subservice(&self) -> u8;
+
+    fn user_data(&self) -> Option<&[u8]>;
+    fn crc16(&self) -> Option<u16>;
+}