Merge pull request 'prepare next release candidate' (#78) from prep_v0.11.0-rc.1 into main

Reviewed-on: #78

CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v0.11.0-rc.1] 2024-04-03
+
 Major API changes for the time API. If you are using the time API, it is strongly recommended
 to check all the API changes in the **Changed** chapter.
 
@@ -24,9 +26,14 @@ to check all the API changes in the **Changed** chapter.
 - Added basic support conversions to the `time` library. Introduce new `chrono` and `timelib`
   feature gate.
 - Added `CcsdsTimeProvider::timelib_date_time`.
+- Optional support for `defmt` by adding optional `defmt::Format` derives for common types.
 
 ## Changed
 
+- `PusTcCreator::new_simple` now expects a valid slice for the source data instead of an optional
+  slice. For telecommands without application data, `&[]` can be passed.
+- `PusTmSecondaryHeader` constructors now expects a valid slice for the time stamp instead of an
+  optional slice.
 - Renamed `CcsdsTimeProvider::date_time` to `CcsdsTimeProvider::chrono_date_time`
 - Renamed `CcsdsTimeCodes` to `CcsdsTimeCode`
 - Renamed `cds::TimeProvider` to `cds::CdsTime`
@@ -34,6 +41,7 @@ to check all the API changes in the **Changed** chapter.
 - `UnixTimestamp` renamed to `UnixTime`
 - `UnixTime` seconds are now private and can be retrieved using the `secs` member method.
 - `UnixTime::new` renamed to `UnixTime::new_checked`.
+- `UnixTime::secs` renamed to `UnixTime::as_secs`.
 - `UnixTime` now has a nanosecond subsecond precision. The `new` constructor now expects
    nanoseconds as the second argument.
 - Added new `UnixTime::new_subsec_millis` and `UnixTime::new_subsec_millis_checked` API
@@ -43,6 +51,16 @@ to check all the API changes in the **Changed** chapter.
 - `CcsdsTimeProvider::date_time` renamed to `CcsdsTimeProvider::chrono_date_time`.
 - Added `UnixTime::MIN`, `UnixTime::MAX` and `UnixTime::EPOCH`.
 - Added `UnixTime::timelib_date_time`.
+- Error handling for ECSS and time module is more granular now, with a new
+  `DateBeforeCcsdsEpochError` error and a `DateBeforeCcsdsEpoch` enum variant for both
+  `CdsError` and `CucError`.
+- `PusTmCreator` now has two lifetimes: One for the raw source data buffer and one for the
+  raw timestamp.
+- Time API `from_now*` API renamed to `now*`.
+
+## Removed
+
+- Legacy `PusTm` and `PusTc` objects.
 
 # [v0.11.0-rc.0] 2024-03-04
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "spacepackets"
-version = "0.11.0-rc.0"
+version = "0.11.0-rc.1"
 edition = "2021"
 rust-version = "1.61"
 authors = ["Robin Mueller <muellerr@irs.uni-stuttgart.de>"]
@@ -48,6 +48,10 @@ optional = true
 version = "0.2"
 default-features = false
 
+[dependencies.defmt]
+version = "0.3"
+optional = true
+
 [dev-dependencies]
 postcard = "1"
 chrono = "0.4"
@@ -59,7 +63,8 @@ serde = ["dep:serde", "chrono/serde"]
 alloc = ["postcard/alloc", "chrono/alloc"]
 chrono = ["dep:chrono"]
 timelib = ["dep:time"]
+defmt = ["dep:defmt"]
 
 [package.metadata.docs.rs]
 all-features = true
-rustdoc-args = ["--cfg", "doc_cfg", "--generate-link-to-definition"]
+rustdoc-args = ["--cfg", "docs_rs", "--generate-link-to-definition"]

README.md

@@ -45,6 +45,8 @@ deserializing them with an appropriate `serde` provider like
  - [`serde`](https://serde.rs/): Adds `serde` support for most types by adding `Serialize` and `Deserialize` `derive`s
  - [`chrono`](https://crates.io/crates/chrono): Add basic support for the `chrono` time library.
  - [`timelib`](https://crates.io/crates/time): Add basic support for the `time` time library.
+ - [`defmt`](https://defmt.ferrous-systems.com/): Add support for the `defmt` by adding the
+   [`defmt::Format`](https://defmt.ferrous-systems.com/format) derive on many types.
 
 # Examples
 

release-checklist.md

@@ -4,11 +4,11 @@ Checklist for new releases
 # Pre-Release
 
 1. Make sure any new modules are documented sufficiently enough and check docs with
-   `cargo +nightly doc --all-features --config 'rustdocflags=["--cfg", "doc_cfg"]' --open`.
+   `cargo +nightly doc --all-features --config 'build.rustdocflags=["--cfg", "docs_rs"]' --open`.
 2. Bump version specifier in `Cargo.toml`.
 3. Update `CHANGELOG.md`: Convert `unreleased` section into version section with date and add new
    `unreleased` section.
-4. Run `cargo test --all-features`.
+4. Run `cargo test --all-features` or `cargo nextest r --all-features`.
 5. Run `cargo fmt` and `cargo clippy`. Check `cargo msrv` against MSRV in `Cargo.toml`.
 6. Wait for CI/CD results for EGit and Github. These also check cross-compilation for bare-metal
    targets.

src/cfdp/lv.rs

@@ -20,6 +20,7 @@ pub const MIN_LV_LEN: usize = 1;
 ///    this will be the lifetime of that data reference.
 #[derive(Debug, Copy, Clone, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct Lv<'data> {
     data: &'data [u8],
     // If the LV was generated from a raw bytestream, this will contain the start of the
@@ -88,7 +89,6 @@ impl<'data> Lv<'data> {
     /// Helper function to build a string LV. This is especially useful for the file or directory
     /// path LVs
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
     pub fn new_from_string(string: &'data String) -> Result<Lv<'data>, TlvLvError> {
         Self::new(string.as_bytes())
     }

src/cfdp/mod.rs

@@ -18,6 +18,7 @@ pub const CFDP_VERSION_2: u8 = 0b001;
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum PduType {
     FileDirective = 0,
@@ -26,6 +27,7 @@ pub enum PduType {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum Direction {
     TowardsReceiver = 0,
@@ -34,6 +36,7 @@ pub enum Direction {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum TransmissionMode {
     Acknowledged = 0,
@@ -42,6 +45,7 @@ pub enum TransmissionMode {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum CrcFlag {
     NoCrc = 0,
@@ -69,6 +73,7 @@ impl From<CrcFlag> for bool {
 /// Always 0 and ignored for File Directive PDUs (CCSDS 727.0-B-5 P.75)
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum SegmentMetadataFlag {
     NotPresent = 0,
@@ -78,6 +83,7 @@ pub enum SegmentMetadataFlag {
 /// Always 0 and ignored for File Directive PDUs (CCSDS 727.0-B-5 P.75)
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum SegmentationControl {
     NoRecordBoundaryPreservation = 0,
@@ -86,6 +92,7 @@ pub enum SegmentationControl {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum FaultHandlerCode {
     NoticeOfCancellation = 0b0001,
@@ -96,6 +103,7 @@ pub enum FaultHandlerCode {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum ConditionCode {
     /// This is not an error condition for which a faulty handler override can be specified
@@ -118,6 +126,7 @@ pub enum ConditionCode {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum LargeFileFlag {
     /// 32 bit maximum file size and FSS size
@@ -129,6 +138,7 @@ pub enum LargeFileFlag {
 /// Transaction status for the ACK PDU field according to chapter 5.2.4 of the CFDP standard.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum TransactionStatus {
     /// Transaction is not currently active and the CFDP implementation does not retain a
@@ -146,6 +156,7 @@ pub enum TransactionStatus {
 /// [SANA Checksum Types registry](https://sanaregistry.org/r/checksum_identifiers/)
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum ChecksumType {
     /// Modular legacy checksum
@@ -167,6 +178,7 @@ pub const NULL_CHECKSUM_U32: [u8; 4] = [0; 4];
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum TlvLvError {
     DataTooLarge(usize),
     ByteConversion(ByteConversionError),

src/cfdp/pdu/ack.rs

@@ -15,6 +15,7 @@ use serde::{Deserialize, Serialize};
 /// For more information, refer to CFDP chapter 5.2.4.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct AckPdu {
     pdu_header: PduHeader,
     directive_code_of_acked_pdu: FileDirectiveType,

src/cfdp/pdu/eof.rs

@@ -15,6 +15,7 @@ use super::{CfdpPdu, WritablePduPacket};
 /// For more information, refer to CFDP chapter 5.2.2.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct EofPdu {
     pdu_header: PduHeader,
     condition_code: ConditionCode,

src/cfdp/pdu/finished.rs

@@ -14,6 +14,7 @@ use super::{CfdpPdu, WritablePduPacket};
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum DeliveryCode {
     Complete = 0,
@@ -22,6 +23,7 @@ pub enum DeliveryCode {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum FileStatus {
     DiscardDeliberately = 0b00,
@@ -34,6 +36,7 @@ pub enum FileStatus {
 ///
 /// For more information, refer to CFDP chapter 5.2.3.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct FinishedPduCreator<'fs_responses> {
     pdu_header: PduHeader,
     condition_code: ConditionCode,
@@ -219,6 +222,7 @@ impl<'buf> Iterator for FilestoreResponseIterator<'buf> {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct FinishedPduReader<'buf> {
     pdu_header: PduHeader,
     condition_code: ConditionCode,

src/cfdp/pdu/metadata.rs

@@ -15,6 +15,7 @@ use super::{CfdpPdu, WritablePduPacket};
 
 #[derive(Default, Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct MetadataGenericParams {
     pub closure_requested: bool,
     pub checksum_type: ChecksumType,
@@ -55,6 +56,7 @@ pub fn build_metadata_opts_from_vec(
 /// This abstraction exposes a specialized API for creating metadata PDUs as specified in
 /// CFDP chapter 5.2.5.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct MetadataPduCreator<'src_name, 'dest_name, 'opts> {
     pdu_header: PduHeader,
     metadata_params: MetadataGenericParams,
@@ -241,6 +243,7 @@ impl<'opts> Iterator for OptionsIter<'opts> {
 /// involved.
 #[derive(Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct MetadataPduReader<'buf> {
     pdu_header: PduHeader,
     metadata_params: MetadataGenericParams,

src/cfdp/pdu/mod.rs

@@ -18,6 +18,7 @@ pub mod nak;
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum FileDirectiveType {
     EofPdu = 0x04,
@@ -220,6 +221,7 @@ pub trait CfdpPdu {
 /// same.
 #[derive(Debug, Copy, Clone, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct CommonPduConfig {
     source_entity_id: UnsignedByteField,
     dest_entity_id: UnsignedByteField,
@@ -358,6 +360,7 @@ pub const FIXED_HEADER_LEN: usize = 4;
 /// For detailed information, refer to chapter 5.1 of the CFDP standard.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PduHeader {
     pdu_type: PduType,
     pdu_conf: CommonPduConfig,

src/cfdp/pdu/nak.rs

@@ -12,6 +12,7 @@ use super::{
 /// Helper type to encapsulate both normal file size segment requests and large file size segment
 /// requests.
 #[derive(Debug, PartialEq, Eq, Clone)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum SegmentRequests<'a> {
     U32Pairs(&'a [(u32, u32)]),
     U64Pairs(&'a [(u64, u64)]),
@@ -31,6 +32,7 @@ impl SegmentRequests<'_> {
 /// It exposes a specialized API which simplifies to generate these NAK PDUs with the
 /// format according to CFDP chapter 5.2.6.
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct NakPduCreator<'seg_reqs> {
     pdu_header: PduHeader,
     start_of_scope: u64,
@@ -353,6 +355,7 @@ impl<T: SegReqFromBytes> SegmentRequestIter<'_, T> {
 ///
 /// The NAK format is expected to be conforming to CFDP chapter 5.2.6.
 #[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct NakPduReader<'seg_reqs> {
     pdu_header: PduHeader,
     start_of_scope: u64,

src/cfdp/tlv/mod.rs

@@ -52,6 +52,7 @@ pub trait WritableTlv {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum TlvType {
     FilestoreRequest = 0x00,
@@ -64,6 +65,7 @@ pub enum TlvType {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum TlvTypeField {
     Standard(TlvType),
     Custom(u8),
@@ -71,6 +73,7 @@ pub enum TlvTypeField {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum FilestoreActionCode {
     CreateFile = 0b0000,
@@ -118,6 +121,7 @@ impl From<TlvTypeField> for u8 {
 ///    this will be the lifetime of that data reference.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct Tlv<'data> {
     tlv_type_field: TlvTypeField,
     #[cfg_attr(feature = "serde", serde(borrow))]
@@ -224,6 +228,7 @@ pub(crate) fn verify_tlv_type(raw_type: u8, expected_tlv_type: TlvType) -> Resul
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct EntityIdTlv {
     entity_id: UnsignedByteField,
 }
@@ -348,6 +353,7 @@ pub fn fs_request_has_second_filename(action_code: FilestoreActionCode) -> bool
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 struct FilestoreTlvBase<'first_name, 'second_name> {
     pub action_code: FilestoreActionCode,
     #[cfg_attr(feature = "serde", serde(borrow))]
@@ -561,6 +567,7 @@ impl GenericTlv for FilestoreRequestTlv<'_, '_> {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct FilestoreResponseTlv<'first_name, 'second_name, 'fs_msg> {
     #[cfg_attr(feature = "serde", serde(borrow))]
     base: FilestoreTlvBase<'first_name, 'second_name>,

src/ecss/hk.rs

@@ -5,6 +5,7 @@ use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone, IntoPrimitive, TryFromPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 pub enum Subservice {
     // Regular HK

src/ecss/mod.rs

@@ -74,6 +74,7 @@ pub enum PusServiceId {
 /// All PUS versions. Only PUS C is supported by this library.
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[non_exhaustive]
 pub enum PusVersion {
     EsaPus = 0,
@@ -150,6 +151,7 @@ pub enum PfcReal {
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum PusError {
     VersionNotSupported(PusVersion),
     ChecksumFailure(u16),
@@ -205,13 +207,12 @@ pub trait PusPacket: CcsdsPacket {
     fn crc16(&self) -> Option<u16>;
 }
 
-pub(crate) fn crc_from_raw_data(raw_data: &[u8]) -> Result<u16, PusError> {
+pub(crate) fn crc_from_raw_data(raw_data: &[u8]) -> Result<u16, ByteConversionError> {
     if raw_data.len() < 2 {
         return Err(ByteConversionError::FromSliceTooSmall {
             found: raw_data.len(),
             expected: 2,
-        }
+        });
-        .into());
     }
     Ok(u16::from_be_bytes(
         raw_data[raw_data.len() - 2..raw_data.len()]
@@ -226,35 +227,16 @@ pub(crate) fn calc_pus_crc16(bytes: &[u8]) -> u16 {
     digest.finalize()
 }
 
-pub(crate) fn crc_procedure(
-    calc_on_serialization: bool,
-    cached_crc16: &Option<u16>,
-    start_idx: usize,
-    curr_idx: usize,
-    slice: &[u8],
-) -> Result<u16, PusError> {
-    let crc16;
-    if calc_on_serialization {
-        crc16 = calc_pus_crc16(&slice[start_idx..curr_idx])
-    } else if cached_crc16.is_none() {
-        return Err(PusError::CrcCalculationMissing);
-    } else {
-        crc16 = cached_crc16.unwrap();
-    }
-    Ok(crc16)
-}
-
 pub(crate) fn user_data_from_raw(
     current_idx: usize,
     total_len: usize,
     slice: &[u8],
-) -> Result<&[u8], PusError> {
+) -> Result<&[u8], ByteConversionError> {
     match current_idx {
         _ if current_idx > total_len - 2 => Err(ByteConversionError::FromSliceTooSmall {
             found: total_len - 2,
             expected: current_idx,
-        }
+        }),
-        .into()),
         _ => Ok(&slice[current_idx..total_len - 2]),
     }
 }

src/ecss/tc.rs

@@ -48,8 +48,6 @@ use zerocopy::AsBytes;
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
 
-pub use legacy_tc::*;
-
 /// PUS C secondary header length is fixed
 pub const PUC_TC_SECONDARY_HEADER_LEN: usize = size_of::<zc::PusTcSecondaryHeader>();
 pub const PUS_TC_MIN_LEN_WITHOUT_APP_DATA: usize =
@@ -61,6 +59,7 @@ pub trait IsPusTelecommand {}
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone, IntoPrimitive, TryFromPrimitive)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(u8)]
 enum AckOpts {
     Acceptance = 0b1000,
@@ -146,6 +145,7 @@ pub mod zc {
 
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PusTcSecondaryHeader {
     pub service: u8,
     pub subservice: u8,
@@ -212,333 +212,6 @@ impl PusTcSecondaryHeader {
     }
 }
 
-pub mod legacy_tc {
-    use crate::ecss::tc::{
-        zc, GenericPusTcSecondaryHeader, IsPusTelecommand, PusTcSecondaryHeader, ACK_ALL,
-        PUC_TC_SECONDARY_HEADER_LEN, PUS_TC_MIN_LEN_WITHOUT_APP_DATA,
-    };
-    use crate::ecss::{
-        ccsds_impl, crc_from_raw_data, crc_procedure, sp_header_impls,
-        verify_crc16_ccitt_false_from_raw_to_pus_error, PusError, PusPacket, WritablePusPacket,
-        CCSDS_HEADER_LEN,
-    };
-    use crate::ecss::{user_data_from_raw, PusVersion};
-    use crate::SequenceFlags;
-    use crate::{ByteConversionError, CcsdsPacket, PacketType, SpHeader, CRC_CCITT_FALSE};
-    use core::mem::size_of;
-    use delegate::delegate;
-    use zerocopy::AsBytes;
-
-    #[cfg(feature = "alloc")]
-    use alloc::vec::Vec;
-
-    #[cfg(feature = "serde")]
-    use serde::{Deserialize, Serialize};
-
-    /// This class models the PUS C telecommand packet. It is the primary data structure to generate the
-    /// raw byte representation of a PUS telecommand or to deserialize from one from raw bytes.
-    ///
-    /// This class also derives the [serde::Serialize] and [serde::Deserialize] trait if the
-    /// [serde] feature is used, which allows to send around TC packets in a raw byte format using a
-    /// serde provider like [postcard](https://docs.rs/postcard/latest/postcard/).
-    ///
-    /// There is no spare bytes support yet.
-    ///
-    /// # Lifetimes
-    ///
-    /// * `'raw_data` - If the TC is not constructed from a raw slice, this will be the life time of
-    ///    a buffer where the user provided application data will be serialized into. If it
-    ///    is, this is the lifetime of the raw byte slice it is constructed from.
-    #[derive(Eq, Copy, Clone, Debug)]
-    #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-    pub struct PusTc<'raw_data> {
-        sp_header: SpHeader,
-        pub sec_header: PusTcSecondaryHeader,
-        /// If this is set to false, a manual call to [PusTc::calc_own_crc16] or
-        /// [PusTc::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
-        pub calc_crc_on_serialization: bool,
-        #[cfg_attr(feature = "serde", serde(skip))]
-        raw_data: Option<&'raw_data [u8]>,
-        app_data: &'raw_data [u8],
-        crc16: Option<u16>,
-    }
-
-    impl<'raw_data> PusTc<'raw_data> {
-        /// Generates a new struct instance.
-        ///
-        /// # Arguments
-        ///
-        /// * `sp_header` - Space packet header information. The correct packet type will be set
-        ///     automatically
-        /// * `sec_header` - Information contained in the data field header, including the service
-        ///     and subservice type
-        /// * `app_data` - Custom application data
-        /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
-        ///     field. If this is not set to true, [PusTc::update_ccsds_data_len] can be called to set
-        ///     the correct value to this field manually
-        #[deprecated(
-            since = "0.7.0",
-            note = "Use specialized PusTcCreator or PusTcReader classes instead"
-        )]
-        pub fn new(
-            sp_header: &mut SpHeader,
-            sec_header: PusTcSecondaryHeader,
-            app_data: Option<&'raw_data [u8]>,
-            set_ccsds_len: bool,
-        ) -> Self {
-            sp_header.set_packet_type(PacketType::Tc);
-            sp_header.set_sec_header_flag();
-            let mut pus_tc = Self {
-                sp_header: *sp_header,
-                raw_data: None,
-                app_data: app_data.unwrap_or(&[]),
-                sec_header,
-                calc_crc_on_serialization: true,
-                crc16: None,
-            };
-            if set_ccsds_len {
-                pus_tc.update_ccsds_data_len();
-            }
-            pus_tc
-        }
-
-        /// Simplified version of the [PusTc::new] function which allows to only specify service and
-        /// subservice instead of the full PUS TC secondary header.
-        #[deprecated(
-            since = "0.7.0",
-            note = "Use specialized PusTcCreator or PusTcReader classes instead"
-        )]
-        pub fn new_simple(
-            sph: &mut SpHeader,
-            service: u8,
-            subservice: u8,
-            app_data: Option<&'raw_data [u8]>,
-            set_ccsds_len: bool,
-        ) -> Self {
-            #[allow(deprecated)]
-            Self::new(
-                sph,
-                PusTcSecondaryHeader::new(service, subservice, ACK_ALL, 0),
-                app_data,
-                set_ccsds_len,
-            )
-        }
-
-        pub fn sp_header(&self) -> &SpHeader {
-            &self.sp_header
-        }
-
-        pub fn set_ack_field(&mut self, ack: u8) -> bool {
-            if ack > 0b1111 {
-                return false;
-            }
-            self.sec_header.ack = ack & 0b1111;
-            true
-        }
-
-        pub fn set_source_id(&mut self, source_id: u16) {
-            self.sec_header.source_id = source_id;
-        }
-
-        sp_header_impls!();
-
-        /// Calculate the CCSDS space packet data length field and sets it
-        /// This is called automatically if the `set_ccsds_len` argument in the [PusTc::new] call was
-        /// used.
-        /// If this was not done or the application data is set or changed after construction,
-        /// this function needs to be called to ensure that the data length field of the CCSDS header
-        /// is set correctly.
-        pub fn update_ccsds_data_len(&mut self) {
-            self.sp_header.data_len =
-                self.len_written() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
-        }
-
-        /// This function should be called before the TC packet is serialized if
-        /// [PusTc::calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
-        pub fn calc_own_crc16(&mut self) {
-            let mut digest = CRC_CCITT_FALSE.digest();
-            let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-            digest.update(sph_zc.as_bytes());
-            let pus_tc_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
-            digest.update(pus_tc_header.as_bytes());
-            if !self.app_data.is_empty() {
-                digest.update(self.app_data);
-            }
-            self.crc16 = Some(digest.finalize())
-        }
-
-        /// This helper function calls both [PusTc::update_ccsds_data_len] and [PusTc::calc_own_crc16].
-        pub fn update_packet_fields(&mut self) {
-            self.update_ccsds_data_len();
-            self.calc_own_crc16();
-        }
-
-        #[cfg(feature = "alloc")]
-        #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
-        pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
-            let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-            let appended_len = PUS_TC_MIN_LEN_WITHOUT_APP_DATA + self.app_data.len();
-            let start_idx = vec.len();
-            let mut ser_len = 0;
-            vec.extend_from_slice(sph_zc.as_bytes());
-            ser_len += sph_zc.as_bytes().len();
-            // The PUS version is hardcoded to PUS C
-            let pus_tc_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
-            vec.extend_from_slice(pus_tc_header.as_bytes());
-            ser_len += pus_tc_header.as_bytes().len();
-            vec.extend_from_slice(self.app_data);
-            ser_len += self.app_data.len();
-            let crc16 = crc_procedure(
-                self.calc_crc_on_serialization,
-                &self.crc16,
-                start_idx,
-                ser_len,
-                &vec[start_idx..ser_len],
-            )?;
-            vec.extend_from_slice(crc16.to_be_bytes().as_slice());
-            Ok(appended_len)
-        }
-
-        /// Create a [PusTc] instance from a raw slice. On success, it returns a tuple containing
-        /// the instance and the found byte length of the packet.
-        #[deprecated(
-            since = "0.7.0",
-            note = "Use specialized PusTcCreator or PusTcReader classes instead"
-        )]
-        pub fn from_bytes(slice: &'raw_data [u8]) -> Result<(Self, usize), PusError> {
-            let raw_data_len = slice.len();
-            if raw_data_len < PUS_TC_MIN_LEN_WITHOUT_APP_DATA {
-                return Err(ByteConversionError::FromSliceTooSmall {
-                    found: raw_data_len,
-                    expected: PUS_TC_MIN_LEN_WITHOUT_APP_DATA,
-                }
-                .into());
-            }
-            let mut current_idx = 0;
-            let (sp_header, _) = SpHeader::from_be_bytes(&slice[0..CCSDS_HEADER_LEN])?;
-            current_idx += CCSDS_HEADER_LEN;
-            let total_len = sp_header.total_len();
-            if raw_data_len < total_len || total_len < PUS_TC_MIN_LEN_WITHOUT_APP_DATA {
-                return Err(ByteConversionError::FromSliceTooSmall {
-                    found: raw_data_len,
-                    expected: total_len,
-                }
-                .into());
-            }
-            let sec_header = zc::PusTcSecondaryHeader::from_bytes(
-                &slice[current_idx..current_idx + PUC_TC_SECONDARY_HEADER_LEN],
-            )
-            .ok_or(ByteConversionError::ZeroCopyFromError)?;
-            current_idx += PUC_TC_SECONDARY_HEADER_LEN;
-            let raw_data = &slice[0..total_len];
-            let pus_tc = Self {
-                sp_header,
-                sec_header: PusTcSecondaryHeader::try_from(sec_header).unwrap(),
-                raw_data: Some(raw_data),
-                app_data: user_data_from_raw(current_idx, total_len, slice)?,
-                calc_crc_on_serialization: false,
-                crc16: Some(crc_from_raw_data(raw_data)?),
-            };
-            verify_crc16_ccitt_false_from_raw_to_pus_error(
-                raw_data,
-                pus_tc.crc16.expect("CRC16 invalid"),
-            )?;
-            Ok((pus_tc, total_len))
-        }
-
-        #[deprecated(since = "0.5.2", note = "use raw_bytes() instead")]
-        pub fn raw(&self) -> Option<&'raw_data [u8]> {
-            self.raw_bytes()
-        }
-
-        /// If [Self] was constructed [Self::from_bytes], this function will return the slice it was
-        /// constructed from. Otherwise, [None] will be returned.
-        pub fn raw_bytes(&self) -> Option<&'raw_data [u8]> {
-            self.raw_data
-        }
-    }
-
-    impl WritablePusPacket for PusTc<'_> {
-        fn len_written(&self) -> usize {
-            PUS_TC_MIN_LEN_WITHOUT_APP_DATA + self.app_data.len()
-        }
-
-        /// Write the raw PUS byte representation to a provided buffer.
-        fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, PusError> {
-            let mut curr_idx = 0;
-            let tc_header_len = size_of::<zc::PusTcSecondaryHeader>();
-            let total_size = self.len_written();
-            if total_size > slice.len() {
-                return Err(ByteConversionError::ToSliceTooSmall {
-                    found: slice.len(),
-                    expected: total_size,
-                }
-                .into());
-            }
-            self.sp_header.write_to_be_bytes(slice)?;
-            curr_idx += CCSDS_HEADER_LEN;
-            let sec_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
-            sec_header
-                .write_to_bytes(&mut slice[curr_idx..curr_idx + tc_header_len])
-                .ok_or(ByteConversionError::ZeroCopyToError)?;
-
-            curr_idx += tc_header_len;
-            slice[curr_idx..curr_idx + self.app_data.len()].copy_from_slice(self.app_data);
-            curr_idx += self.app_data.len();
-            let crc16 = crc_procedure(
-                self.calc_crc_on_serialization,
-                &self.crc16,
-                0,
-                curr_idx,
-                slice,
-            )?;
-            slice[curr_idx..curr_idx + 2].copy_from_slice(crc16.to_be_bytes().as_slice());
-            curr_idx += 2;
-            Ok(curr_idx)
-        }
-    }
-
-    impl PartialEq for PusTc<'_> {
-        fn eq(&self, other: &Self) -> bool {
-            self.sp_header == other.sp_header
-                && self.sec_header == other.sec_header
-                && self.app_data == other.app_data
-        }
-    }
-
-    impl CcsdsPacket for PusTc<'_> {
-        ccsds_impl!();
-    }
-
-    impl PusPacket for PusTc<'_> {
-        delegate!(to self.sec_header {
-            fn pus_version(&self) -> PusVersion;
-            fn service(&self) -> u8;
-            fn subservice(&self) -> u8;
-        });
-
-        fn user_data(&self) -> &[u8] {
-            self.app_data
-        }
-
-        fn crc16(&self) -> Option<u16> {
-            self.crc16
-        }
-    }
-
-    impl GenericPusTcSecondaryHeader for PusTc<'_> {
-        delegate!(to self.sec_header {
-            fn pus_version(&self) -> PusVersion;
-            fn service(&self) -> u8;
-            fn subservice(&self) -> u8;
-            fn source_id(&self) -> u16;
-            fn ack_flags(&self) -> u8;
-        });
-    }
-
-    impl IsPusTelecommand for PusTc<'_> {}
-}
-
 /// This class can be used to create PUS C telecommand packet. It is the primary data structure to
 /// generate the raw byte representation of a PUS telecommand.
 ///
@@ -549,6 +222,7 @@ pub mod legacy_tc {
 /// There is no spare bytes support yet.
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PusTcCreator<'raw_data> {
     sp_header: SpHeader,
     pub sec_header: PusTcSecondaryHeader,
@@ -566,7 +240,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
     ///     and subservice type
     /// * `app_data` - Custom application data
     /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
-    ///     field. If this is not set to true, [PusTc::update_ccsds_data_len] can be called to set
+    ///     field. If this is not set to true, [Self::update_ccsds_data_len] can be called to set
     ///     the correct value to this field manually
     pub fn new(
         sp_header: &mut SpHeader,
@@ -587,19 +261,19 @@ impl<'raw_data> PusTcCreator<'raw_data> {
         pus_tc
     }
 
-    /// Simplified version of the [PusTcCreator::new] function which allows to only specify service
+    /// Simplified version of the [Self::new] function which allows to only specify service
     /// and subservice instead of the full PUS TC secondary header.
     pub fn new_simple(
         sph: &mut SpHeader,
         service: u8,
         subservice: u8,
-        app_data: Option<&'raw_data [u8]>,
+        app_data: &'raw_data [u8],
         set_ccsds_len: bool,
     ) -> Self {
         Self::new(
             sph,
             PusTcSecondaryHeader::new(service, subservice, ACK_ALL, 0),
-            app_data.unwrap_or(&[]),
+            app_data,
             set_ccsds_len,
         )
     }
@@ -631,7 +305,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
     sp_header_impls!();
 
     /// Calculate the CCSDS space packet data length field and sets it
-    /// This is called automatically if the `set_ccsds_len` argument in the [PusTc::new] call was
+    /// This is called automatically if the `set_ccsds_len` argument in the [Self::new] call was
     /// used.
     /// If this was not done or the application data is set or changed after construction,
     /// this function needs to be called to ensure that the data length field of the CCSDS header
@@ -641,8 +315,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
             self.len_written() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
     }
 
-    /// This function should be called before the TC packet is serialized if
+    /// This function calculates and returns the CRC16 for the current packet.
-    /// [PusTc::calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
     pub fn calc_own_crc16(&self) -> u16 {
         let mut digest = CRC_CCITT_FALSE.digest();
         let sph_zc = crate::zc::SpHeader::from(self.sp_header);
@@ -654,8 +327,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
     }
 
     #[cfg(feature = "alloc")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
+    pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> usize {
-    pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
         let sph_zc = crate::zc::SpHeader::from(self.sp_header);
         let mut appended_len = PUS_TC_MIN_LEN_WITHOUT_APP_DATA;
         appended_len += self.app_data.len();
@@ -668,7 +340,7 @@ impl<'raw_data> PusTcCreator<'raw_data> {
         let mut digest = CRC_CCITT_FALSE.digest();
         digest.update(&vec[start_idx..start_idx + appended_len - 2]);
         vec.extend_from_slice(&digest.finalize().to_be_bytes());
-        Ok(appended_len)
+        appended_len
     }
 }
 
@@ -752,6 +424,7 @@ impl IsPusTelecommand for PusTcCreator<'_> {}
 /// * `'raw_data` - Lifetime of the provided raw slice.
 #[derive(Eq, Copy, Clone, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PusTcReader<'raw_data> {
     #[cfg_attr(feature = "serde", serde(skip))]
     raw_data: &'raw_data [u8],
@@ -763,7 +436,8 @@ pub struct PusTcReader<'raw_data> {
 
 impl<'raw_data> PusTcReader<'raw_data> {
     /// Create a [PusTcReader] instance from a raw slice. On success, it returns a tuple containing
-    /// the instance and the found byte length of the packet.
+    /// the instance and the found byte length of the packet. This function also performs a CRC
+    /// check and will return an appropriate [PusError] if the check fails.
     pub fn new(slice: &'raw_data [u8]) -> Result<(Self, usize), PusError> {
         let raw_data_len = slice.len();
         if raw_data_len < PUS_TC_MIN_LEN_WITHOUT_APP_DATA {
@@ -901,12 +575,12 @@ mod tests {
 
     fn base_ping_tc_simple_ctor() -> PusTcCreator<'static> {
         let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
-        PusTcCreator::new_simple(&mut sph, 17, 1, None, true)
+        PusTcCreator::new_simple(&mut sph, 17, 1, &[], true)
     }
 
     fn base_ping_tc_simple_ctor_with_app_data(app_data: &'static [u8]) -> PusTcCreator<'static> {
         let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
-        PusTcCreator::new_simple(&mut sph, 17, 1, Some(app_data), true)
+        PusTcCreator::new_simple(&mut sph, 17, 1, app_data, true)
     }
 
     #[test]
@@ -963,7 +637,7 @@ mod tests {
     #[test]
     fn test_update_func() {
         let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
-        let mut tc = PusTcCreator::new_simple(&mut sph, 17, 1, None, false);
+        let mut tc = PusTcCreator::new_simple(&mut sph, 17, 1, &[], false);
         assert_eq!(tc.data_len(), 0);
         tc.update_ccsds_data_len();
         assert_eq!(tc.data_len(), 6);
@@ -1010,9 +684,7 @@ mod tests {
     fn test_vec_ser_deser() {
         let pus_tc = base_ping_tc_simple_ctor();
         let mut test_vec = Vec::new();
-        let size = pus_tc
+        let size = pus_tc.append_to_vec(&mut test_vec);
-            .append_to_vec(&mut test_vec)
-            .expect("Error writing TC to vector");
         assert_eq!(size, 13);
         verify_test_tc_raw(&test_vec.as_slice());
         verify_crc_no_app_data(&test_vec.as_slice());
@@ -1058,9 +730,7 @@ mod tests {
         let pus_tc = base_ping_tc_simple_ctor_with_app_data(&[1, 2, 3]);
         verify_test_tc(&pus_tc, true, 16);
         let mut test_vec = Vec::new();
-        let size = pus_tc
+        let size = pus_tc.append_to_vec(&mut test_vec);
-            .append_to_vec(&mut test_vec)
-            .expect("Error writing TC to vector");
         assert_eq!(test_vec[11], 1);
         assert_eq!(test_vec[12], 2);
         assert_eq!(test_vec[13], 3);

src/ecss/tm.rs

@@ -19,7 +19,6 @@ use alloc::vec::Vec;
 use delegate::delegate;
 
 use crate::time::{TimeWriter, TimestampError};
-pub use legacy_tm::*;
 
 use self::zc::PusTmSecHeaderWithoutTimestamp;
 
@@ -116,6 +115,7 @@ pub mod zc {
 
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PusTmSecondaryHeader<'stamp> {
     pus_version: PusVersion,
     pub sc_time_ref_status: u8,
@@ -123,17 +123,17 @@ pub struct PusTmSecondaryHeader<'stamp> {
     pub subservice: u8,
     pub msg_counter: u16,
     pub dest_id: u16,
-    pub timestamp: &'stamp [u8],
+    pub time_stamp: &'stamp [u8],
 }
 
 impl<'stamp> PusTmSecondaryHeader<'stamp> {
-    pub fn new_simple(service: u8, subservice: u8, timestamp: &'stamp [u8]) -> Self {
+    pub fn new_simple(service: u8, subservice: u8, time_stamp: &'stamp [u8]) -> Self {
-        Self::new(service, subservice, 0, 0, Some(timestamp))
+        Self::new(service, subservice, 0, 0, time_stamp)
     }
 
     /// Like [Self::new_simple] but without a timestamp.
     pub fn new_simple_no_timestamp(service: u8, subservice: u8) -> Self {
-        Self::new(service, subservice, 0, 0, None)
+        Self::new(service, subservice, 0, 0, &[])
     }
 
     pub fn new(
@@ -141,7 +141,7 @@ impl<'stamp> PusTmSecondaryHeader<'stamp> {
         subservice: u8,
         msg_counter: u16,
         dest_id: u16,
-        timestamp: Option<&'stamp [u8]>,
+        time_stamp: &'stamp [u8],
     ) -> Self {
         PusTmSecondaryHeader {
             pus_version: PusVersion::PusC,
@@ -150,7 +150,7 @@ impl<'stamp> PusTmSecondaryHeader<'stamp> {
             subservice,
             msg_counter,
             dest_id,
-            timestamp: timestamp.unwrap_or(&[]),
+            time_stamp,
         }
     }
 }
@@ -192,340 +192,11 @@ impl<'slice> TryFrom<zc::PusTmSecHeader<'slice>> for PusTmSecondaryHeader<'slice
             subservice: sec_header.zc_header.subservice(),
             msg_counter: sec_header.zc_header.msg_counter(),
             dest_id: sec_header.zc_header.dest_id(),
-            timestamp: sec_header.timestamp,
+            time_stamp: sec_header.timestamp,
         })
     }
 }
 
-pub mod legacy_tm {
-    use crate::ecss::tm::{
-        zc, GenericPusTmSecondaryHeader, IsPusTelemetry, PusTmSecondaryHeader,
-        PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA, PUS_TM_MIN_SEC_HEADER_LEN,
-    };
-    use crate::ecss::PusVersion;
-    use crate::ecss::{
-        ccsds_impl, crc_from_raw_data, crc_procedure, sp_header_impls, user_data_from_raw,
-        verify_crc16_ccitt_false_from_raw_to_pus_error, PusError, PusPacket, WritablePusPacket,
-        CCSDS_HEADER_LEN,
-    };
-    use crate::SequenceFlags;
-    use crate::{ByteConversionError, CcsdsPacket, PacketType, SpHeader, CRC_CCITT_FALSE};
-    use core::mem::size_of;
-    use zerocopy::AsBytes;
-
-    #[cfg(feature = "serde")]
-    use serde::{Deserialize, Serialize};
-
-    #[cfg(feature = "alloc")]
-    use alloc::vec::Vec;
-    use delegate::delegate;
-
-    /// This class models the PUS C telemetry packet. It is the primary data structure to generate the
-    /// raw byte representation of PUS telemetry or to deserialize from one from raw bytes.
-    ///
-    /// This class also derives the [serde::Serialize] and [serde::Deserialize] trait if the [serde]
-    /// feature is used which allows to send around TM packets in a raw byte format using a serde
-    /// provider like [postcard](https://docs.rs/postcard/latest/postcard/).
-    ///
-    /// There is no spare bytes support yet.
-    ///
-    /// # Lifetimes
-    ///
-    /// * `'raw_data` - If the TM is not constructed from a raw slice, this will be the life time of
-    ///    a buffer where the user provided time stamp and source data will be serialized into. If it
-    ///    is, this is the lifetime of the raw byte slice it is constructed from.
-    #[derive(Eq, Debug, Copy, Clone)]
-    #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-    pub struct PusTm<'raw_data> {
-        pub sp_header: SpHeader,
-        pub sec_header: PusTmSecondaryHeader<'raw_data>,
-        /// If this is set to false, a manual call to [PusTm::calc_own_crc16] or
-        /// [PusTm::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
-        pub calc_crc_on_serialization: bool,
-        #[cfg_attr(feature = "serde", serde(skip))]
-        raw_data: Option<&'raw_data [u8]>,
-        source_data: &'raw_data [u8],
-        crc16: Option<u16>,
-    }
-
-    impl<'raw_data> PusTm<'raw_data> {
-        /// Generates a new struct instance.
-        ///
-        /// # Arguments
-        ///
-        /// * `sp_header` - Space packet header information. The correct packet type will be set
-        ///     automatically
-        /// * `sec_header` - Information contained in the secondary header, including the service
-        ///     and subservice type
-        /// * `app_data` - Custom application data
-        /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
-        ///     field. If this is not set to true, [PusTm::update_ccsds_data_len] can be called to set
-        ///     the correct value to this field manually
-        #[deprecated(
-            since = "0.7.0",
-            note = "Use specialized PusTmCreator or PusTmReader classes instead"
-        )]
-        pub fn new(
-            sp_header: &mut SpHeader,
-            sec_header: PusTmSecondaryHeader<'raw_data>,
-            source_data: Option<&'raw_data [u8]>,
-            set_ccsds_len: bool,
-        ) -> Self {
-            sp_header.set_packet_type(PacketType::Tm);
-            sp_header.set_sec_header_flag();
-            let mut pus_tm = PusTm {
-                sp_header: *sp_header,
-                raw_data: None,
-                source_data: source_data.unwrap_or(&[]),
-                sec_header,
-                calc_crc_on_serialization: true,
-                crc16: None,
-            };
-            if set_ccsds_len {
-                pus_tm.update_ccsds_data_len();
-            }
-            pus_tm
-        }
-
-        pub fn timestamp(&self) -> &[u8] {
-            self.sec_header.timestamp
-        }
-
-        pub fn source_data(&self) -> &[u8] {
-            self.source_data
-        }
-
-        pub fn set_dest_id(&mut self, dest_id: u16) {
-            self.sec_header.dest_id = dest_id;
-        }
-
-        pub fn set_msg_counter(&mut self, msg_counter: u16) {
-            self.sec_header.msg_counter = msg_counter
-        }
-
-        pub fn set_sc_time_ref_status(&mut self, sc_time_ref_status: u8) {
-            self.sec_header.sc_time_ref_status = sc_time_ref_status & 0b1111;
-        }
-
-        sp_header_impls!();
-
-        /// This is called automatically if the `set_ccsds_len` argument in the [PusTm::new] call was
-        /// used.
-        /// If this was not done or the time stamp or source data is set or changed after construction,
-        /// this function needs to be called to ensure that the data length field of the CCSDS header
-        /// is set correctly
-        pub fn update_ccsds_data_len(&mut self) {
-            self.sp_header.data_len =
-                self.len_written() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
-        }
-
-        /// This function should be called before the TM packet is serialized if
-        /// [PusTm.calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
-        pub fn calc_own_crc16(&mut self) {
-            let mut digest = CRC_CCITT_FALSE.digest();
-            let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-            digest.update(sph_zc.as_bytes());
-            let pus_tc_header =
-                zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
-            digest.update(pus_tc_header.as_bytes());
-            digest.update(self.sec_header.timestamp);
-            digest.update(self.source_data);
-            self.crc16 = Some(digest.finalize())
-        }
-
-        /// This helper function calls both [PusTm.update_ccsds_data_len] and [PusTm.calc_own_crc16]
-        pub fn update_packet_fields(&mut self) {
-            self.update_ccsds_data_len();
-            self.calc_own_crc16();
-        }
-
-        /// Append the raw PUS byte representation to a provided [alloc::vec::Vec]
-        #[cfg(feature = "alloc")]
-        #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
-        pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
-            let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-            let mut appended_len = PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA;
-            appended_len += self.sec_header.timestamp.len();
-            appended_len += self.source_data.len();
-            let start_idx = vec.len();
-            let mut ser_len = 0;
-            vec.extend_from_slice(sph_zc.as_bytes());
-            ser_len += sph_zc.as_bytes().len();
-            // The PUS version is hardcoded to PUS C
-            let sec_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
-            vec.extend_from_slice(sec_header.as_bytes());
-            ser_len += sec_header.as_bytes().len();
-            ser_len += self.sec_header.timestamp.len();
-            vec.extend_from_slice(self.sec_header.timestamp);
-            vec.extend_from_slice(self.source_data);
-            ser_len += self.source_data.len();
-            let crc16 = crc_procedure(
-                self.calc_crc_on_serialization,
-                &self.crc16,
-                start_idx,
-                ser_len,
-                &vec[start_idx..start_idx + ser_len],
-            )?;
-            vec.extend_from_slice(crc16.to_be_bytes().as_slice());
-            Ok(appended_len)
-        }
-
-        /// Create a [PusTm] instance from a raw slice. On success, it returns a tuple containing
-        /// the instance and the found byte length of the packet. The timestamp length needs to be
-        /// known beforehand.
-        #[deprecated(
-            since = "0.7.0",
-            note = "Use specialized PusTmCreator or PusTmReader classes instead"
-        )]
-        pub fn from_bytes(
-            slice: &'raw_data [u8],
-            timestamp_len: usize,
-        ) -> Result<(Self, usize), PusError> {
-            let raw_data_len = slice.len();
-            if raw_data_len < PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA {
-                return Err(ByteConversionError::FromSliceTooSmall {
-                    found: raw_data_len,
-                    expected: PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA,
-                }
-                .into());
-            }
-            let mut current_idx = 0;
-            let (sp_header, _) = SpHeader::from_be_bytes(&slice[0..CCSDS_HEADER_LEN])?;
-            current_idx += 6;
-            let total_len = sp_header.total_len();
-            if raw_data_len < total_len {
-                return Err(ByteConversionError::FromSliceTooSmall {
-                    found: raw_data_len,
-                    expected: PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA,
-                }
-                .into());
-            }
-            if total_len < PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA {
-                return Err(ByteConversionError::FromSliceTooSmall {
-                    found: total_len,
-                    expected: PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA,
-                }
-                .into());
-            }
-            let sec_header_zc = zc::PusTmSecHeaderWithoutTimestamp::from_bytes(
-                &slice[current_idx..current_idx + PUS_TM_MIN_SEC_HEADER_LEN],
-            )
-            .ok_or(ByteConversionError::ZeroCopyFromError)?;
-            current_idx += PUS_TM_MIN_SEC_HEADER_LEN;
-            let zc_sec_header_wrapper = zc::PusTmSecHeader {
-                zc_header: sec_header_zc,
-                timestamp: &slice[current_idx..current_idx + timestamp_len],
-            };
-            current_idx += timestamp_len;
-            let raw_data = &slice[0..total_len];
-            let pus_tm = PusTm {
-                sp_header,
-                sec_header: PusTmSecondaryHeader::try_from(zc_sec_header_wrapper).unwrap(),
-                raw_data: Some(&slice[0..total_len]),
-                source_data: user_data_from_raw(current_idx, total_len, slice)?,
-                calc_crc_on_serialization: false,
-                crc16: Some(crc_from_raw_data(raw_data)?),
-            };
-            verify_crc16_ccitt_false_from_raw_to_pus_error(
-                raw_data,
-                pus_tm.crc16.expect("CRC16 invalid"),
-            )?;
-            Ok((pus_tm, total_len))
-        }
-
-        /// If [Self] was constructed [Self::from_bytes], this function will return the slice it was
-        /// constructed from. Otherwise, [None] will be returned.
-        pub fn raw_bytes(&self) -> Option<&'raw_data [u8]> {
-            self.raw_data
-        }
-    }
-
-    impl WritablePusPacket for PusTm<'_> {
-        fn len_written(&self) -> usize {
-            PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA
-                + self.sec_header.timestamp.len()
-                + self.source_data.len()
-        }
-        /// Write the raw PUS byte representation to a provided buffer.
-        fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, PusError> {
-            let mut curr_idx = 0;
-            let total_size = self.len_written();
-            if total_size > slice.len() {
-                return Err(ByteConversionError::ToSliceTooSmall {
-                    found: slice.len(),
-                    expected: total_size,
-                }
-                .into());
-            }
-            self.sp_header
-                .write_to_be_bytes(&mut slice[0..CCSDS_HEADER_LEN])?;
-            curr_idx += CCSDS_HEADER_LEN;
-            let sec_header_len = size_of::<zc::PusTmSecHeaderWithoutTimestamp>();
-            let sec_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
-            sec_header
-                .write_to_bytes(&mut slice[curr_idx..curr_idx + sec_header_len])
-                .ok_or(ByteConversionError::ZeroCopyToError)?;
-            curr_idx += sec_header_len;
-            slice[curr_idx..curr_idx + self.sec_header.timestamp.len()]
-                .copy_from_slice(self.sec_header.timestamp);
-            curr_idx += self.sec_header.timestamp.len();
-            slice[curr_idx..curr_idx + self.source_data.len()].copy_from_slice(self.source_data);
-            curr_idx += self.source_data.len();
-            let crc16 = crc_procedure(
-                self.calc_crc_on_serialization,
-                &self.crc16,
-                0,
-                curr_idx,
-                slice,
-            )?;
-            slice[curr_idx..curr_idx + 2].copy_from_slice(crc16.to_be_bytes().as_slice());
-            curr_idx += 2;
-            Ok(curr_idx)
-        }
-    }
-
-    impl PartialEq for PusTm<'_> {
-        fn eq(&self, other: &Self) -> bool {
-            self.sp_header == other.sp_header
-                && self.sec_header == other.sec_header
-                && self.source_data == other.source_data
-        }
-    }
-
-    impl CcsdsPacket for PusTm<'_> {
-        ccsds_impl!();
-    }
-
-    impl PusPacket for PusTm<'_> {
-        delegate!(to self.sec_header {
-            fn pus_version(&self) -> PusVersion;
-            fn service(&self) -> u8;
-            fn subservice(&self) -> u8;
-        });
-
-        fn user_data(&self) -> &[u8] {
-            self.source_data
-        }
-
-        fn crc16(&self) -> Option<u16> {
-            self.crc16
-        }
-    }
-
-    impl GenericPusTmSecondaryHeader for PusTm<'_> {
-        delegate!(to self.sec_header {
-            fn pus_version(&self) -> PusVersion;
-            fn service(&self) -> u8;
-            fn subservice(&self) -> u8;
-            fn dest_id(&self) -> u16;
-            fn msg_counter(&self) -> u16;
-            fn sc_time_ref_status(&self) -> u8;
-        });
-    }
-
-    impl IsPusTelemetry for PusTm<'_> {}
-}
-
 /// This class models the PUS C telemetry packet. It is the primary data structure to generate the
 /// raw byte representation of PUS telemetry.
 ///
@@ -540,16 +211,18 @@ pub mod legacy_tm {
 /// * `'raw_data` - This is the lifetime of the user provided time stamp and source data.
 #[derive(Eq, Debug, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct PusTmCreator<'raw_data> {
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub struct PusTmCreator<'time, 'raw_data> {
     pub sp_header: SpHeader,
-    pub sec_header: PusTmSecondaryHeader<'raw_data>,
+    #[cfg_attr(feature = "serde", serde(borrow))]
+    pub sec_header: PusTmSecondaryHeader<'time>,
     source_data: &'raw_data [u8],
-    /// If this is set to false, a manual call to [PusTm::calc_own_crc16] or
+    /// If this is set to false, a manual call to [Self::calc_own_crc16] or
-    /// [PusTm::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
+    /// [Self::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
     pub calc_crc_on_serialization: bool,
 }
 
-impl<'raw_data> PusTmCreator<'raw_data> {
+impl<'time, 'raw_data> PusTmCreator<'time, 'raw_data> {
     /// Generates a new struct instance.
     ///
     /// # Arguments
@@ -560,11 +233,11 @@ impl<'raw_data> PusTmCreator<'raw_data> {
     ///     and subservice type
     /// * `source_data` - Custom application data
     /// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
-    ///     field. If this is not set to true, [PusTm::update_ccsds_data_len] can be called to set
+    ///     field. If this is not set to true, [Self::update_ccsds_data_len] can be called to set
     ///     the correct value to this field manually
     pub fn new(
         sp_header: &mut SpHeader,
-        sec_header: PusTmSecondaryHeader<'raw_data>,
+        sec_header: PusTmSecondaryHeader<'time>,
         source_data: &'raw_data [u8],
         set_ccsds_len: bool,
     ) -> Self {
@@ -587,7 +260,7 @@ impl<'raw_data> PusTmCreator<'raw_data> {
         service: u8,
         subservice: u8,
         time_provider: &impl TimeWriter,
-        stamp_buf: &'raw_data mut [u8],
+        stamp_buf: &'time mut [u8],
         source_data: Option<&'raw_data [u8]>,
         set_ccsds_len: bool,
     ) -> Result<Self, TimestampError> {
@@ -604,14 +277,14 @@ impl<'raw_data> PusTmCreator<'raw_data> {
 
     pub fn new_no_source_data(
         sp_header: &mut SpHeader,
-        sec_header: PusTmSecondaryHeader<'raw_data>,
+        sec_header: PusTmSecondaryHeader<'time>,
         set_ccsds_len: bool,
     ) -> Self {
         Self::new(sp_header, sec_header, &[], set_ccsds_len)
     }
 
     pub fn timestamp(&self) -> &[u8] {
-        self.sec_header.timestamp
+        self.sec_header.time_stamp
     }
 
     pub fn source_data(&self) -> &[u8] {
@@ -632,7 +305,7 @@ impl<'raw_data> PusTmCreator<'raw_data> {
 
     sp_header_impls!();
 
-    /// This is called automatically if the `set_ccsds_len` argument in the [PusTm::new] call was
+    /// This is called automatically if the `set_ccsds_len` argument in the [Self::new] call was
     /// used.
     /// If this was not done or the time stamp or source data is set or changed after construction,
     /// this function needs to be called to ensure that the data length field of the CCSDS header
@@ -643,60 +316,32 @@ impl<'raw_data> PusTmCreator<'raw_data> {
     }
 
     /// This function should be called before the TM packet is serialized if
-    /// [PusTm.calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
+    /// [Self::calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
     pub fn calc_own_crc16(&self) -> u16 {
         let mut digest = CRC_CCITT_FALSE.digest();
         let sph_zc = crate::zc::SpHeader::from(self.sp_header);
         digest.update(sph_zc.as_bytes());
         let pus_tc_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
         digest.update(pus_tc_header.as_bytes());
-        digest.update(self.sec_header.timestamp);
+        digest.update(self.sec_header.time_stamp);
         digest.update(self.source_data);
         digest.finalize()
     }
 
-    /// This helper function calls both [PusTm.update_ccsds_data_len] and [PusTm.calc_own_crc16]
+    /// This helper function calls both [Self::update_ccsds_data_len] and [Self::calc_own_crc16]
     pub fn update_packet_fields(&mut self) {
         self.update_ccsds_data_len();
     }
 
-    /// Append the raw PUS byte representation to a provided [alloc::vec::Vec]
-    #[cfg(feature = "alloc")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
-    pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
-        let sph_zc = crate::zc::SpHeader::from(self.sp_header);
-        let mut appended_len = PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA + self.sec_header.timestamp.len();
-        appended_len += self.source_data.len();
-        let start_idx = vec.len();
-        vec.extend_from_slice(sph_zc.as_bytes());
-        // The PUS version is hardcoded to PUS C
-        let sec_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
-        vec.extend_from_slice(sec_header.as_bytes());
-        vec.extend_from_slice(self.sec_header.timestamp);
-        vec.extend_from_slice(self.source_data);
-        let mut digest = CRC_CCITT_FALSE.digest();
-        digest.update(&vec[start_idx..start_idx + appended_len - 2]);
-        vec.extend_from_slice(&digest.finalize().to_be_bytes());
-        Ok(appended_len)
-    }
-}
-
-impl WritablePusPacket for PusTmCreator<'_> {
-    fn len_written(&self) -> usize {
-        PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA
-            + self.sec_header.timestamp.len()
-            + self.source_data.len()
-    }
     /// Write the raw PUS byte representation to a provided buffer.
-    fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, PusError> {
+    pub fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, ByteConversionError> {
         let mut curr_idx = 0;
         let total_size = self.len_written();
         if total_size > slice.len() {
             return Err(ByteConversionError::ToSliceTooSmall {
                 found: slice.len(),
                 expected: total_size,
-            }
+            });
-            .into());
         }
         self.sp_header
             .write_to_be_bytes(&mut slice[0..CCSDS_HEADER_LEN])?;
@@ -707,9 +352,9 @@ impl WritablePusPacket for PusTmCreator<'_> {
             .write_to_bytes(&mut slice[curr_idx..curr_idx + sec_header_len])
             .ok_or(ByteConversionError::ZeroCopyToError)?;
         curr_idx += sec_header_len;
-        slice[curr_idx..curr_idx + self.sec_header.timestamp.len()]
+        slice[curr_idx..curr_idx + self.sec_header.time_stamp.len()]
-            .copy_from_slice(self.sec_header.timestamp);
+            .copy_from_slice(self.sec_header.time_stamp);
-        curr_idx += self.sec_header.timestamp.len();
+        curr_idx += self.sec_header.time_stamp.len();
         slice[curr_idx..curr_idx + self.source_data.len()].copy_from_slice(self.source_data);
         curr_idx += self.source_data.len();
         let mut digest = CRC_CCITT_FALSE.digest();
@@ -718,9 +363,41 @@ impl WritablePusPacket for PusTmCreator<'_> {
         curr_idx += 2;
         Ok(curr_idx)
     }
+
+    /// Append the raw PUS byte representation to a provided [alloc::vec::Vec]
+    #[cfg(feature = "alloc")]
+    pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
+        let sph_zc = crate::zc::SpHeader::from(self.sp_header);
+        let mut appended_len =
+            PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA + self.sec_header.time_stamp.len();
+        appended_len += self.source_data.len();
+        let start_idx = vec.len();
+        vec.extend_from_slice(sph_zc.as_bytes());
+        // The PUS version is hardcoded to PUS C
+        let sec_header = zc::PusTmSecHeaderWithoutTimestamp::try_from(self.sec_header).unwrap();
+        vec.extend_from_slice(sec_header.as_bytes());
+        vec.extend_from_slice(self.sec_header.time_stamp);
+        vec.extend_from_slice(self.source_data);
+        let mut digest = CRC_CCITT_FALSE.digest();
+        digest.update(&vec[start_idx..start_idx + appended_len - 2]);
+        vec.extend_from_slice(&digest.finalize().to_be_bytes());
+        Ok(appended_len)
+    }
 }
 
-impl PartialEq for PusTmCreator<'_> {
+impl WritablePusPacket for PusTmCreator<'_, '_> {
+    fn len_written(&self) -> usize {
+        PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA
+            + self.sec_header.time_stamp.len()
+            + self.source_data.len()
+    }
+    /// Write the raw PUS byte representation to a provided buffer.
+    fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, PusError> {
+        Ok(Self::write_to_bytes(self, slice)?)
+    }
+}
+
+impl PartialEq for PusTmCreator<'_, '_> {
     fn eq(&self, other: &Self) -> bool {
         self.sp_header == other.sp_header
             && self.sec_header == other.sec_header
@@ -728,11 +405,11 @@ impl PartialEq for PusTmCreator<'_> {
     }
 }
 
-impl CcsdsPacket for PusTmCreator<'_> {
+impl CcsdsPacket for PusTmCreator<'_, '_> {
     ccsds_impl!();
 }
 
-impl PusPacket for PusTmCreator<'_> {
+impl PusPacket for PusTmCreator<'_, '_> {
     delegate!(to self.sec_header {
         fn pus_version(&self) -> PusVersion;
         fn service(&self) -> u8;
@@ -748,7 +425,7 @@ impl PusPacket for PusTmCreator<'_> {
     }
 }
 
-impl GenericPusTmSecondaryHeader for PusTmCreator<'_> {
+impl GenericPusTmSecondaryHeader for PusTmCreator<'_, '_> {
     delegate!(to self.sec_header {
         fn pus_version(&self) -> PusVersion;
         fn service(&self) -> u8;
@@ -759,7 +436,7 @@ impl GenericPusTmSecondaryHeader for PusTmCreator<'_> {
     });
 }
 
-impl IsPusTelemetry for PusTmCreator<'_> {}
+impl IsPusTelemetry for PusTmCreator<'_, '_> {}
 
 /// This class models the PUS C telemetry packet. It is the primary data structure to read
 /// a telemetry packet from raw bytes.
@@ -775,6 +452,7 @@ impl IsPusTelemetry for PusTmCreator<'_> {}
 /// * `'raw_data` - Lifetime of the raw slice this class is constructed from.
 #[derive(Eq, Debug, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PusTmReader<'raw_data> {
     pub sp_header: SpHeader,
     pub sec_header: PusTmSecondaryHeader<'raw_data>,
@@ -788,6 +466,9 @@ impl<'raw_data> PusTmReader<'raw_data> {
     /// Create a [PusTmReader] instance from a raw slice. On success, it returns a tuple containing
     /// the instance and the found byte length of the packet. The timestamp length needs to be
     /// known beforehand.
+    ///
+    /// This function will check the CRC-16 of the PUS packet and will return an appropriate
+    /// [PusError] if the check fails.
     pub fn new(slice: &'raw_data [u8], timestamp_len: usize) -> Result<(Self, usize), PusError> {
         let raw_data_len = slice.len();
         if raw_data_len < PUS_TM_MIN_LEN_WITHOUT_SOURCE_DATA {
@@ -846,7 +527,7 @@ impl<'raw_data> PusTmReader<'raw_data> {
     }
 
     pub fn timestamp(&self) -> &[u8] {
-        self.sec_header.timestamp
+        self.sec_header.time_stamp
     }
 
     /// This function will return the slice [Self] was constructed from.
@@ -897,15 +578,15 @@ impl GenericPusTmSecondaryHeader for PusTmReader<'_> {
 
 impl IsPusTelemetry for PusTmReader<'_> {}
 
-impl PartialEq<PusTmCreator<'_>> for PusTmReader<'_> {
+impl PartialEq<PusTmCreator<'_, '_>> for PusTmReader<'_> {
-    fn eq(&self, other: &PusTmCreator<'_>) -> bool {
+    fn eq(&self, other: &PusTmCreator<'_, '_>) -> bool {
         self.sp_header == other.sp_header
             && self.sec_header == other.sec_header
             && self.source_data == other.source_data
     }
 }
 
-impl PartialEq<PusTmReader<'_>> for PusTmCreator<'_> {
+impl PartialEq<PusTmReader<'_>> for PusTmCreator<'_, '_> {
     fn eq(&self, other: &PusTmReader<'_>) -> bool {
         self.sp_header == other.sp_header
             && self.sec_header == other.sec_header
@@ -1117,7 +798,7 @@ mod tests {
         PusTmCreator::new(&mut sph, tm_header, DUMMY_DATA, true)
     }
 
-    fn base_hk_reply<'a>(timestamp: &'a [u8], src_data: &'a [u8]) -> PusTmCreator<'a> {
+    fn base_hk_reply<'a, 'b>(timestamp: &'a [u8], src_data: &'b [u8]) -> PusTmCreator<'a, 'b> {
         let mut sph = SpHeader::tm_unseg(0x123, 0x234, 0).unwrap();
         let tc_header = PusTmSecondaryHeader::new_simple(3, 5, timestamp);
         PusTmCreator::new(&mut sph, tc_header, src_data, true)
@@ -1260,18 +941,11 @@ mod tests {
         let res = pus_tm.write_to_bytes(&mut buf);
         assert!(res.is_err());
         let error = res.unwrap_err();
-        assert!(matches!(error, PusError::ByteConversion { .. }));
+        if let ByteConversionError::ToSliceTooSmall { found, expected } = error {
-        match error {
+            assert_eq!(expected, 22);
-            PusError::ByteConversion(err) => match err {
+            assert_eq!(found, 16);
-                ByteConversionError::ToSliceTooSmall { found, expected } => {
+        } else {
-                    assert_eq!(expected, 22);
+            panic!("Invalid error {:?}", error);
-                    assert_eq!(found, 16);
-                }
-                _ => panic!("Invalid PUS error {:?}", err),
-            },
-            _ => {
-                panic!("Invalid error {:?}", error);
-            }
         }
     }
 
@@ -1473,7 +1147,7 @@ mod tests {
     #[test]
     fn test_sec_header_without_stamp() {
         let sec_header = PusTmSecondaryHeader::new_simple_no_timestamp(17, 1);
-        assert_eq!(sec_header.timestamp, &[]);
+        assert_eq!(sec_header.time_stamp, &[]);
     }
 
     #[test]

src/lib.rs

@@ -36,7 +36,11 @@
 //! ### Optional features
 //!
 //!  - [`serde`](https://serde.rs/): Adds `serde` support for most types by adding `Serialize` and
-//!    `Deserialize` `derive`s
+//!    `Deserialize` `derives.
+//!  - [`chrono`](https://crates.io/crates/chrono): Add basic support for the `chrono` time library.
+//!  - [`timelib`](https://crates.io/crates/time): Add basic support for the `time` time library.
+//!  - [`defmt`](https://defmt.ferrous-systems.com/): Add support for the `defmt` by adding the
+//!    [`defmt::Format`](https://defmt.ferrous-systems.com/format) derive on many types.
 //!
 //! ## Module
 //!
@@ -55,7 +59,7 @@
 //! println!("{:x?}", &ccsds_buf[0..6]);
 //! ```
 #![no_std]
-#![cfg_attr(doc_cfg, feature(doc_cfg))]
+#![cfg_attr(docs_rs, feature(doc_auto_cfg))]
 #[cfg(feature = "alloc")]
 extern crate alloc;
 #[cfg(any(feature = "std", test))]
@@ -93,6 +97,7 @@ pub const MAX_SEQ_COUNT: u16 = 2u16.pow(14) - 1;
 /// Generic error type when converting to and from raw byte slices.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum ByteConversionError {
     /// The passed slice is too small. Returns the passed slice length and expected minimum size
     ToSliceTooSmall {
@@ -142,6 +147,7 @@ impl Error for ByteConversionError {}
 /// CCSDS packet type enumeration.
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum PacketType {
     Tm = 0,
     Tc = 1,
@@ -165,6 +171,7 @@ pub fn packet_type_in_raw_packet_id(packet_id: u16) -> PacketType {
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum SequenceFlags {
     ContinuationSegment = 0b00,
     FirstSegment = 0b01,
@@ -192,6 +199,7 @@ impl TryFrom<u8> for SequenceFlags {
 /// of the first two bytes in the CCSDS primary header.
 #[derive(Debug, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PacketId {
     pub ptype: PacketType,
     pub sec_header_flag: bool,
@@ -303,6 +311,7 @@ impl From<u16> for PacketId {
 /// third and the fourth byte in the CCSDS primary header.
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct PacketSequenceCtrl {
     pub seq_flags: SequenceFlags,
     seq_count: u16,
@@ -463,6 +472,7 @@ pub trait CcsdsPrimaryHeader {
 /// * `data_len` - Data length field occupies the fifth and the sixth byte of the raw header
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct SpHeader {
     pub version: u8,
     pub packet_id: PacketId,
@@ -798,7 +808,7 @@ pub(crate) mod tests {
         let id_default = PacketId::default();
         assert_eq!(id_default.ptype, PacketType::Tm);
         assert_eq!(id_default.apid, 0x000);
-        assert_eq!(id_default.sec_header_flag, false);
+        assert!(!id_default.sec_header_flag);
     }
 
     #[test]
@@ -808,7 +818,7 @@ pub(crate) mod tests {
         let packet_id = packet_id.unwrap();
         assert_eq!(packet_id.apid(), 0x1ff);
         assert_eq!(packet_id.ptype, PacketType::Tc);
-        assert_eq!(packet_id.sec_header_flag, true);
+        assert!(packet_id.sec_header_flag);
         let packet_id_tc = PacketId::tc(true, 0x1ff);
         assert!(packet_id_tc.is_some());
         let packet_id_tc = packet_id_tc.unwrap();

src/time/ascii.rs

@@ -40,13 +40,11 @@ pub mod alloc_mod_chrono {
     };
 
     /// Generates a time code formatter using the [FMT_STR_CODE_A_WITH_SIZE] format.
-    #[cfg_attr(doc_cfg, doc(cfg(all(feature = "alloc", feature = "chrono"))))]
     pub fn generate_time_code_a(date: &DateTime<Utc>) -> DelayedFormat<StrftimeItems<'static>> {
         date.format(FMT_STR_CODE_A_WITH_SIZE.0)
     }
 
     /// Generates a time code formatter using the [FMT_STR_CODE_A_TERMINATED_WITH_SIZE] format.
-    #[cfg_attr(doc_cfg, doc(cfg(all(feature = "alloc", feature = "chrono"))))]
     pub fn generate_time_code_a_terminated(
         date: &DateTime<Utc>,
     ) -> DelayedFormat<StrftimeItems<'static>> {
@@ -54,13 +52,11 @@ pub mod alloc_mod_chrono {
     }
 
     /// Generates a time code formatter using the [FMT_STR_CODE_B_WITH_SIZE] format.
-    #[cfg_attr(doc_cfg, doc(cfg(all(feature = "alloc", feature = "chrono"))))]
     pub fn generate_time_code_b(date: &DateTime<Utc>) -> DelayedFormat<StrftimeItems<'static>> {
         date.format(FMT_STR_CODE_B_WITH_SIZE.0)
     }
 
     /// Generates a time code formatter using the [FMT_STR_CODE_B_TERMINATED_WITH_SIZE] format.
-    #[cfg_attr(doc_cfg, doc(cfg(all(feature = "alloc", feature = "chrono"))))]
     pub fn generate_time_code_b_terminated(
         date: &DateTime<Utc>,
     ) -> DelayedFormat<StrftimeItems<'static>> {

src/time/cds.rs

@@ -34,8 +34,9 @@ use core::any::Any;
 use serde::{Deserialize, Serialize};
 
 use super::{
-    ccsds_to_unix_days, unix_to_ccsds_days, CcsdsTimeCode, CcsdsTimeProvider, TimeReader,
+    ccsds_to_unix_days, unix_to_ccsds_days, CcsdsTimeCode, CcsdsTimeProvider,
-    TimeWriter, TimestampError, UnixTime, MS_PER_DAY, SECONDS_PER_DAY,
+    DateBeforeCcsdsEpochError, TimeReader, TimeWriter, TimestampError, UnixTime, MS_PER_DAY,
+    SECONDS_PER_DAY,
 };
 
 /// Base value for the preamble field for a time field parser to determine the time field type.
@@ -77,6 +78,7 @@ impl ProvidesDaysLength for DaysLen24Bits {
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum LengthOfDaySegment {
     Short16Bits = 0,
     Long24Bits = 1,
@@ -93,12 +95,14 @@ pub enum SubmillisPrecision {
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum CdsError {
     /// CCSDS days value exceeds maximum allowed size or is negative
     InvalidCcsdsDays(i64),
     /// There are distinct constructors depending on the days field width detected in the preamble
     /// field. This error will be returned if there is a missmatch.
     InvalidCtorForDaysOfLenInPreamble(LengthOfDaySegment),
+    DateBeforeCcsdsEpoch(DateBeforeCcsdsEpochError),
 }
 
 impl Display for CdsError {
@@ -113,12 +117,27 @@ impl Display for CdsError {
                     "wrong constructor for length of day {length_of_day:?} detected in preamble",
                 )
             }
+            CdsError::DateBeforeCcsdsEpoch(e) => write!(f, "date before CCSDS epoch: {e}"),
         }
     }
 }
 
 #[cfg(feature = "std")]
-impl Error for CdsError {}
+impl Error for CdsError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            CdsError::DateBeforeCcsdsEpoch(e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
+impl From<DateBeforeCcsdsEpochError> for CdsError {
+    fn from(value: DateBeforeCcsdsEpochError) -> Self {
+        Self::DateBeforeCcsdsEpoch(value)
+    }
+}
+
 pub fn length_of_day_segment_from_pfield(pfield: u8) -> LengthOfDaySegment {
     if (pfield >> 2) & 0b1 == 1 {
         return LengthOfDaySegment::Long24Bits;
@@ -159,7 +178,7 @@ pub fn precision_from_pfield(pfield: u8) -> SubmillisPrecision {
 /// use spacepackets::time::cds::{CdsTime, length_of_day_segment_from_pfield, LengthOfDaySegment};
 /// use spacepackets::time::{TimeWriter, CcsdsTimeCode, CcsdsTimeProvider};
 ///
-/// let timestamp_now = CdsTime::from_now_with_u16_days().unwrap();
+/// let timestamp_now = CdsTime::now_with_u16_days().unwrap();
 /// let mut raw_stamp = [0; 7];
 /// {
 ///     let written = timestamp_now.write_to_bytes(&mut raw_stamp).unwrap();
@@ -226,11 +245,11 @@ impl ConversionFromUnix {
         unix_seconds: i64,
         subsec_nanos: u32,
         precision: SubmillisPrecision,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, DateBeforeCcsdsEpochError> {
         let (unix_days, secs_of_day) = calc_unix_days_and_secs_of_day(unix_seconds);
         let ccsds_days = unix_to_ccsds_days(unix_days);
         if ccsds_days == 0 && (secs_of_day > 0 || subsec_nanos > 0) || ccsds_days < 0 {
-            return Err(TimestampError::DateBeforeCcsdsEpoch(
+            return Err(DateBeforeCcsdsEpochError(
                 UnixTime::new_checked(unix_seconds, subsec_nanos)
                     .expect("unix timestamp creation failed"),
             ));
@@ -318,19 +337,19 @@ fn calc_unix_days_and_secs_of_day(unix_seconds: i64) -> (i64, u32) {
 
 #[cfg(feature = "chrono")]
 impl ConversionFromChronoDatetime {
-    fn new(dt: &chrono::DateTime<chrono::Utc>) -> Result<Self, TimestampError> {
+    fn new(dt: &chrono::DateTime<chrono::Utc>) -> Result<Self, DateBeforeCcsdsEpochError> {
         Self::new_generic(dt, SubmillisPrecision::Absent)
     }
 
     fn new_with_submillis_us_prec(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, DateBeforeCcsdsEpochError> {
         Self::new_generic(dt, SubmillisPrecision::Microseconds)
     }
 
     fn new_with_submillis_ps_prec(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, DateBeforeCcsdsEpochError> {
         Self::new_generic(dt, SubmillisPrecision::Picoseconds)
     }
 
@@ -338,10 +357,10 @@ impl ConversionFromChronoDatetime {
     fn new_generic(
         dt: &chrono::DateTime<chrono::Utc>,
         prec: SubmillisPrecision,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, DateBeforeCcsdsEpochError> {
         // The CDS timestamp does not support timestamps before the CCSDS epoch.
         if dt.year() < 1958 {
-            return Err(TimestampError::DateBeforeCcsdsEpoch(UnixTime::from(*dt)));
+            return Err(DateBeforeCcsdsEpochError(UnixTime::from(*dt)));
         }
         // The contained values in the conversion should be all positive now
         let unix_conversion =
@@ -434,13 +453,10 @@ impl CdsConverter for ConversionFromNow {
 }
 
 #[cfg(feature = "alloc")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
 pub trait DynCdsTimeProvider: CcsdsTimeProvider + CdsTimestamp + TimeWriter + Any {}
 #[cfg(feature = "alloc")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
 impl DynCdsTimeProvider for CdsTime<DaysLen16Bits> {}
 #[cfg(feature = "alloc")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
 impl DynCdsTimeProvider for CdsTime<DaysLen24Bits> {}
 
 /// This function returns the correct [CdsTime] instance from a raw byte array
@@ -470,7 +486,6 @@ impl DynCdsTimeProvider for CdsTime<DaysLen24Bits> {}
 /// }
 /// ```
 #[cfg(feature = "alloc")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
 pub fn get_dyn_time_provider_from_bytes(
     buf: &[u8],
 ) -> Result<Box<dyn DynCdsTimeProvider>, TimestampError> {
@@ -680,7 +695,7 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
     fn from_dt_generic(
         dt: &chrono::DateTime<chrono::Utc>,
         days_len: LengthOfDaySegment,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         let conv_from_dt = ConversionFromChronoDatetime::new(dt)?;
         Self::generic_from_conversion(days_len, conv_from_dt)
     }
@@ -689,7 +704,7 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
     fn from_dt_generic_us_prec(
         dt: &chrono::DateTime<chrono::Utc>,
         days_len: LengthOfDaySegment,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         let conv_from_dt = ConversionFromChronoDatetime::new_with_submillis_us_prec(dt)?;
         Self::generic_from_conversion(days_len, conv_from_dt)
     }
@@ -698,7 +713,7 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
     fn from_dt_generic_ps_prec(
         dt: &chrono::DateTime<chrono::Utc>,
         days_len: LengthOfDaySegment,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         let conv_from_dt = ConversionFromChronoDatetime::new_with_submillis_ps_prec(dt)?;
         Self::generic_from_conversion(days_len, conv_from_dt)
     }
@@ -707,43 +722,41 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
         unix_stamp: &UnixTime,
         days_len: LengthOfDaySegment,
         submillis_prec: SubmillisPrecision,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         let conv_from_dt =
             ConversionFromUnix::new(unix_stamp.secs, unix_stamp.subsec_nanos, submillis_prec)?;
         Self::generic_from_conversion(days_len, conv_from_dt)
     }
 
     #[cfg(feature = "std")]
-    fn from_now_generic(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
+    fn now_generic(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
         let conversion_from_now = ConversionFromNow::new()?;
         Self::generic_from_conversion(days_len, conversion_from_now)
-            .map_err(StdTimestampError::Timestamp)
+            .map_err(|e| StdTimestampError::Timestamp(TimestampError::from(e)))
     }
 
     #[cfg(feature = "std")]
-    fn from_now_generic_us_prec(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
+    fn now_generic_with_us_prec(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
         let conversion_from_now = ConversionFromNow::new_with_submillis_us_prec()?;
         Self::generic_from_conversion(days_len, conversion_from_now)
-            .map_err(StdTimestampError::Timestamp)
+            .map_err(|e| StdTimestampError::Timestamp(TimestampError::from(e)))
     }
 
     #[cfg(feature = "std")]
     fn from_now_generic_ps_prec(days_len: LengthOfDaySegment) -> Result<Self, StdTimestampError> {
         let conversion_from_now = ConversionFromNow::new_with_submillis_ps_prec()?;
         Self::generic_from_conversion(days_len, conversion_from_now)
-            .map_err(StdTimestampError::Timestamp)
+            .map_err(|e| StdTimestampError::Timestamp(TimestampError::from(e)))
     }
 
     fn generic_from_conversion<C: CdsConverter>(
         days_len: LengthOfDaySegment,
         converter: C,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
-        let ccsds_days: ProvidesDaysLen::FieldType =
+        let ccsds_days: ProvidesDaysLen::FieldType = converter
-            converter.ccsds_days_as_u32().try_into().map_err(|_| {
+            .ccsds_days_as_u32()
-                TimestampError::Cds(CdsError::InvalidCcsdsDays(
+            .try_into()
-                    converter.ccsds_days_as_u32().into(),
+            .map_err(|_| CdsError::InvalidCcsdsDays(converter.ccsds_days_as_u32().into()))?;
-                ))
-            })?;
         let mut provider = Self {
             pfield: Self::generate_p_field(days_len, converter.submillis_precision()),
             ccsds_days,
@@ -776,7 +789,6 @@ impl<ProvidesDaysLen: ProvidesDaysLength> CdsTime<ProvidesDaysLen> {
     }
 
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
     pub fn update_from_now(&mut self) -> Result<(), StdTimestampError> {
         let conversion_from_now = self.generic_conversion_from_now()?;
         let ccsds_days: ProvidesDaysLen::FieldType = conversion_from_now
@@ -812,22 +824,19 @@ impl CdsTime<DaysLen24Bits> {
 
     /// Generate a time stamp from the current time using the system clock.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now_with_u24_days() -> Result<Self, StdTimestampError> {
-    pub fn from_now_with_u24_days() -> Result<Self, StdTimestampError> {
+        Self::now_generic(LengthOfDaySegment::Long24Bits)
-        Self::from_now_generic(LengthOfDaySegment::Long24Bits)
     }
 
     /// Create a provider from a [`chrono::DateTime<chrono::Utc>`] struct.
     ///
     /// ## Errors
     ///
-    /// This function will return [TimestampError::DateBeforeCcsdsEpoch] or
+    /// This function will return [CdsError::DateBeforeCcsdsEpoch] if the time is before the CCSDS
-    /// [TimestampError::Cds] if the time is before the CCSDS epoch (1958-01-01T00:00:00+00:00)
+    /// epoch (1958-01-01T00:00:00+00:00) or the CCSDS days value exceeds the allowed bit width
-    /// or the CCSDS days value exceeds the allowed bit width (24 bits).
+    /// (24 bits).
     #[cfg(feature = "chrono")]
-    pub fn from_dt_with_u24_days(
+    pub fn from_dt_with_u24_days(dt: &chrono::DateTime<chrono::Utc>) -> Result<Self, CdsError> {
-        dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
         Self::from_dt_generic(dt, LengthOfDaySegment::Long24Bits)
     }
 
@@ -835,13 +844,13 @@ impl CdsTime<DaysLen24Bits> {
     ///
     /// ## Errors
     ///
-    /// This function will return [TimestampError::DateBeforeCcsdsEpoch] or
+    /// This function will return [CdsError::DateBeforeCcsdsEpoch] if the time is before the CCSDS
-    /// [TimestampError::Cds] if the time is before the CCSDS epoch (1958-01-01T00:00:00+00:00)
+    /// epoch (1958-01-01T00:00:00+00:00) or the CCSDS days value exceeds the allowed bit width
-    /// or the CCSDS days value exceeds the allowed bit width (24 bits).
+    /// (24 bits).
-    pub fn from_unix_stamp_with_u24_days(
+    pub fn from_unix_time_with_u24_day(
         unix_stamp: &UnixTime,
         submillis_prec: SubmillisPrecision,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_unix_generic(unix_stamp, LengthOfDaySegment::Long24Bits, submillis_prec)
     }
 
@@ -849,7 +858,7 @@ impl CdsTime<DaysLen24Bits> {
     #[cfg(feature = "chrono")]
     pub fn from_dt_with_u24_days_us_precision(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_dt_generic_us_prec(dt, LengthOfDaySegment::Long24Bits)
     }
 
@@ -857,22 +866,20 @@ impl CdsTime<DaysLen24Bits> {
     #[cfg(feature = "chrono")]
     pub fn from_dt_with_u24_days_ps_precision(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_dt_generic_ps_prec(dt, LengthOfDaySegment::Long24Bits)
     }
 
-    /// Like [Self::from_now_with_u24_days] but with microsecond sub-millisecond precision.
+    /// Like [Self::now_with_u24_days] but with microsecond sub-millisecond precision.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now_with_u24_days_us_precision() -> Result<Self, StdTimestampError> {
-    pub fn from_now_with_u24_days_us_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Long24Bits)
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Long24Bits)
     }
 
-    /// Like [Self::from_now_with_u24_days] but with picoseconds sub-millisecond precision.
+    /// Like [Self::now_with_u24_days] but with picoseconds sub-millisecond precision.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now_with_u24_days_ps_precision() -> Result<Self, StdTimestampError> {
-    pub fn from_now_with_u24_days_ps_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Long24Bits)
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Long24Bits)
     }
 
     pub fn from_bytes_with_u24_days(buf: &[u8]) -> Result<Self, TimestampError> {
@@ -911,34 +918,31 @@ impl CdsTime<DaysLen16Bits> {
 
     /// Create a provider from a [`chrono::DateTime<Utc>`] struct.
     ///
-    /// This function will return a [TimestampError::DateBeforeCcsdsEpoch] or a
+    /// This function will return a [CdsError::DateBeforeCcsdsEpoch] if the time is before the
-    /// [TimestampError::Cds] if the time is before the CCSDS epoch (01-01-1958 00:00:00) or
+    /// CCSDS epoch (01-01-1958 00:00:00) or the CCSDS days value exceeds the allowed bit width
-    /// the CCSDS days value exceeds the allowed bit width (16 bits).
+    /// (16 bits).
     #[cfg(feature = "chrono")]
-    pub fn from_dt_with_u16_days(
+    pub fn from_dt_with_u16_days(dt: &chrono::DateTime<chrono::Utc>) -> Result<Self, CdsError> {
-        dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
         Self::from_dt_generic(dt, LengthOfDaySegment::Short16Bits)
     }
 
     /// Generate a time stamp from the current time using the system clock.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now_with_u16_days() -> Result<Self, StdTimestampError> {
-    pub fn from_now_with_u16_days() -> Result<Self, StdTimestampError> {
+        Self::now_generic(LengthOfDaySegment::Short16Bits)
-        Self::from_now_generic(LengthOfDaySegment::Short16Bits)
     }
 
     /// Create a provider from a generic UNIX timestamp (seconds since 1970-01-01T00:00:00+00:00).
     ///
     /// ## Errors
     ///
-    /// This function will return [TimestampError::DateBeforeCcsdsEpoch] or
+    /// This function will return [CdsError::DateBeforeCcsdsEpoch] if the time is before the CCSDS
-    /// [TimestampError::Cds] if the time is before the CCSDS epoch (1958-01-01T00:00:00+00:00)
+    /// epoch (1958-01-01T00:00:00+00:00) or the CCSDS days value exceeds the allowed bit width
-    /// or the CCSDS days value exceeds the allowed bit width (24 bits).
+    /// (24 bits).
-    pub fn from_unix_stamp_with_u16_days(
+    pub fn from_unix_time_with_u16_days(
         unix_stamp: &UnixTime,
         submillis_prec: SubmillisPrecision,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_unix_generic(unix_stamp, LengthOfDaySegment::Short16Bits, submillis_prec)
     }
 
@@ -946,7 +950,7 @@ impl CdsTime<DaysLen16Bits> {
     #[cfg(feature = "chrono")]
     pub fn from_dt_with_u16_days_us_precision(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_dt_generic_us_prec(dt, LengthOfDaySegment::Short16Bits)
     }
 
@@ -954,20 +958,18 @@ impl CdsTime<DaysLen16Bits> {
     #[cfg(feature = "chrono")]
     pub fn from_dt_with_u16_days_ps_precision(
         dt: &chrono::DateTime<chrono::Utc>,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CdsError> {
         Self::from_dt_generic_ps_prec(dt, LengthOfDaySegment::Short16Bits)
     }
 
-    /// Like [Self::from_now_with_u16_days] but with microsecond sub-millisecond precision.
+    /// Like [Self::now_with_u16_days] but with microsecond sub-millisecond precision.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now_with_u16_days_us_precision() -> Result<Self, StdTimestampError> {
-    pub fn from_now_with_u16_days_us_precision() -> Result<Self, StdTimestampError> {
+        Self::now_generic_with_us_prec(LengthOfDaySegment::Short16Bits)
-        Self::from_now_generic_us_prec(LengthOfDaySegment::Short16Bits)
     }
 
-    /// Like [Self::from_now_with_u16_days] but with picosecond sub-millisecond precision.
+    /// Like [Self::now_with_u16_days] but with picosecond sub-millisecond precision.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
     pub fn from_now_with_u16_days_ps_precision() -> Result<Self, StdTimestampError> {
         Self::from_now_generic_ps_prec(LengthOfDaySegment::Short16Bits)
     }
@@ -1168,7 +1170,7 @@ impl AddAssign<Duration> for CdsTime<DaysLen24Bits> {
 
 #[cfg(feature = "chrono")]
 impl TryFrom<chrono::DateTime<chrono::Utc>> for CdsTime<DaysLen16Bits> {
-    type Error = TimestampError;
+    type Error = CdsError;
 
     fn try_from(dt: chrono::DateTime<chrono::Utc>) -> Result<Self, Self::Error> {
         let conversion = ConversionFromChronoDatetime::new(&dt)?;
@@ -1178,8 +1180,7 @@ impl TryFrom<chrono::DateTime<chrono::Utc>> for CdsTime<DaysLen16Bits> {
 
 #[cfg(feature = "chrono")]
 impl TryFrom<chrono::DateTime<chrono::Utc>> for CdsTime<DaysLen24Bits> {
-    type Error = TimestampError;
+    type Error = CdsError;
-
     fn try_from(dt: chrono::DateTime<chrono::Utc>) -> Result<Self, Self::Error> {
         let conversion = ConversionFromChronoDatetime::new(&dt)?;
         Self::generic_from_conversion(LengthOfDaySegment::Long24Bits, conversion)
@@ -1609,14 +1610,14 @@ mod tests {
 
     #[test]
     fn test_time_now() {
-        let timestamp_now = CdsTime::from_now_with_u16_days().unwrap();
+        let timestamp_now = CdsTime::now_with_u16_days().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
 
     #[test]
     fn test_time_now_us_prec() {
-        let timestamp_now = CdsTime::from_now_with_u16_days_us_precision().unwrap();
+        let timestamp_now = CdsTime::now_with_u16_days_us_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
@@ -1637,7 +1638,7 @@ mod tests {
 
     #[test]
     fn test_time_now_ps_prec_u24_days() {
-        let timestamp_now = CdsTime::from_now_with_u24_days_ps_precision().unwrap();
+        let timestamp_now = CdsTime::now_with_u24_days_ps_precision().unwrap();
         let compare_stamp = chrono::Utc::now();
         generic_now_test(timestamp_now, compare_stamp);
     }
@@ -1922,7 +1923,7 @@ mod tests {
     fn test_creation_from_unix_stamp_0_u16_days() {
         let unix_secs = 0;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
+        let time_provider = CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1934,7 +1935,7 @@ mod tests {
     fn test_creation_from_unix_stamp_0_u24_days() {
         let unix_secs = 0;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u24_days(
+        let time_provider = CdsTime::from_unix_time_with_u24_day(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1951,11 +1952,9 @@ mod tests {
             .unwrap()
             .and_local_timezone(chrono::Utc)
             .unwrap();
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
+        let time_provider =
-            &datetime_utc.into(),
+            CdsTime::from_unix_time_with_u16_days(&datetime_utc.into(), SubmillisPrecision::Absent)
-            SubmillisPrecision::Absent,
+                .expect("creating provider from unix stamp failed");
-        )
-        .expect("creating provider from unix stamp failed");
         // https://www.timeanddate.com/date/durationresult.html?d1=01&m1=01&y1=1958&d2=14&m2=01&y2=2023
         // Leap years need to be accounted for as well.
         assert_eq!(time_provider.ccsds_days, 23754);
@@ -1971,7 +1970,7 @@ mod tests {
     fn test_creation_0_ccsds_days() {
         let unix_secs = DAYS_CCSDS_TO_UNIX as i64 * SECONDS_PER_DAY as i64;
         let subsec_millis = 0;
-        let time_provider = CdsTime::from_unix_stamp_with_u16_days(
+        let time_provider = CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         )
@@ -1983,7 +1982,7 @@ mod tests {
     fn test_invalid_creation_from_unix_stamp_days_too_large() {
         let invalid_unix_secs: i64 = (u16::MAX as i64 + 1) * SECONDS_PER_DAY as i64;
         let subsec_millis = 0;
-        match CdsTime::from_unix_stamp_with_u16_days(
+        match CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(invalid_unix_secs, subsec_millis),
             SubmillisPrecision::Absent,
         ) {
@@ -1991,12 +1990,12 @@ mod tests {
                 panic!("creation should not succeed")
             }
             Err(e) => {
-                if let TimestampError::Cds(CdsError::InvalidCcsdsDays(days)) = e {
+                if let CdsError::InvalidCcsdsDays(days) = e {
                     assert_eq!(
                         days,
                         unix_to_ccsds_days(invalid_unix_secs / SECONDS_PER_DAY as i64)
                     );
-                    assert_eq!(e.to_string(), "cds error: invalid ccsds days 69919");
+                    assert_eq!(e.to_string(), "invalid ccsds days 69919");
                 } else {
                     panic!("unexpected error {}", e)
                 }
@@ -2010,7 +2009,7 @@ mod tests {
         // precisely 31-12-1957 23:59:55
         let unix_secs = DAYS_CCSDS_TO_UNIX * SECONDS_PER_DAY as i32 - 5;
         let subsec_millis = 0;
-        match CdsTime::from_unix_stamp_with_u16_days(
+        match CdsTime::from_unix_time_with_u16_days(
             &UnixTime::new(unix_secs as i64, subsec_millis),
             SubmillisPrecision::Absent,
         ) {
@@ -2018,8 +2017,8 @@ mod tests {
                 panic!("creation should not succeed")
             }
             Err(e) => {
-                if let TimestampError::DateBeforeCcsdsEpoch(dt) = e {
+                if let CdsError::DateBeforeCcsdsEpoch(DateBeforeCcsdsEpochError(unix_dt)) = e {
-                    let dt = dt.chrono_date_time();
+                    let dt = unix_dt.chrono_date_time();
                     if let chrono::LocalResult::Single(dt) = dt {
                         assert_eq!(dt.year(), 1957);
                         assert_eq!(dt.month(), 12);
@@ -2249,7 +2248,9 @@ mod tests {
             .unwrap();
         let time_provider = CdsTime::from_dt_with_u24_days(&datetime_utc);
         assert!(time_provider.is_err());
-        if let TimestampError::DateBeforeCcsdsEpoch(dt) = time_provider.unwrap_err() {
+        if let CdsError::DateBeforeCcsdsEpoch(DateBeforeCcsdsEpochError(dt)) =
+            time_provider.unwrap_err()
+        {
             assert_eq!(dt, datetime_utc.into());
         }
     }
@@ -2308,7 +2309,7 @@ mod tests {
     #[test]
     #[cfg(feature = "serde")]
     fn test_serialization() {
-        let stamp_now = CdsTime::from_now_with_u16_days().expect("Error retrieving time");
+        let stamp_now = CdsTime::now_with_u16_days().expect("Error retrieving time");
         let val = to_allocvec(&stamp_now).expect("Serializing timestamp failed");
         assert!(val.len() > 0);
         let stamp_deser: CdsTime = from_bytes(&val).expect("Stamp deserialization failed");

src/time/cuc.rs

@@ -17,7 +17,8 @@ use crate::ByteConversionError;
 use super::StdTimestampError;
 use super::{
     ccsds_epoch_to_unix_epoch, ccsds_time_code_from_p_field, unix_epoch_to_ccsds_epoch,
-    CcsdsTimeCode, CcsdsTimeProvider, TimeReader, TimeWriter, TimestampError, UnixTime,
+    CcsdsTimeCode, CcsdsTimeProvider, DateBeforeCcsdsEpochError, TimeReader, TimeWriter,
+    TimestampError, UnixTime,
 };
 #[cfg(feature = "std")]
 use std::error::Error;
@@ -36,6 +37,7 @@ pub const MAX_CUC_LEN_SMALL_PREAMBLE: usize = 8;
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum FractionalResolution {
     /// No fractional part, only second resolution
     Seconds = 0,
@@ -104,6 +106,7 @@ pub fn fractional_part_from_subsec_ns(res: FractionalResolution, ns: u64) -> Fra
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum CucError {
     InvalidCounterWidth(u8),
     /// Invalid counter supplied.
@@ -116,6 +119,7 @@ pub enum CucError {
         value: u64,
     },
     LeapSecondCorrectionError,
+    DateBeforeCcsdsEpoch(DateBeforeCcsdsEpochError),
 }
 
 impl Display for CucError {
@@ -136,16 +140,34 @@ impl Display for CucError {
             CucError::LeapSecondCorrectionError => {
                 write!(f, "error while correcting for leap seconds")
             }
+            CucError::DateBeforeCcsdsEpoch(e) => {
+                write!(f, "date before ccsds epoch: {e}")
+            }
         }
     }
 }
 
 #[cfg(feature = "std")]
-impl Error for CucError {}
+impl Error for CucError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            CucError::DateBeforeCcsdsEpoch(e) => Some(e),
+            _ => None,
+        }
+    }
+}
 
+impl From<DateBeforeCcsdsEpochError> for CucError {
+    fn from(e: DateBeforeCcsdsEpochError) -> Self {
+        Self::DateBeforeCcsdsEpoch(e)
+    }
+}
+
+/// Tuple object where the first value is the width of the counter and the second value
+/// is the counter value.
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-pub struct WidthCounterPair(u8, u32);
+pub struct WidthCounterPair(pub u8, pub u32);
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -229,7 +251,7 @@ impl FractionalPart {
 /// const LEAP_SECONDS: u32 = 37;
 ///
 /// // Highest fractional resolution
-/// let timestamp_now = CucTime::from_now(FractionalResolution::SixtyNs, LEAP_SECONDS)
+/// let timestamp_now = CucTime::now(FractionalResolution::SixtyNs, LEAP_SECONDS)
 ///     .expect("creating cuc stamp failed");
 /// let mut raw_stamp = [0; 16];
 /// {
@@ -339,8 +361,7 @@ impl CucTime {
     /// must be applied on top of the UTC based time retrieved from the system in addition to the
     /// conversion to the CCSDS epoch.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now(
-    pub fn from_now(
         fraction_resolution: FractionalResolution,
         leap_seconds: u32,
     ) -> Result<Self, StdTimestampError> {
@@ -371,7 +392,6 @@ impl CucTime {
     /// must be applied on top of the UTC based time retrieved from the system in addition to the
     /// conversion to the CCSDS epoch.
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
     pub fn update_from_now(&mut self, leap_seconds: u32) -> Result<(), StdTimestampError> {
         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)?;
         self.counter.1 = unix_epoch_to_ccsds_epoch(now.as_secs() as i64) as u32;
@@ -391,38 +411,36 @@ impl CucTime {
     }
 
     #[cfg(feature = "chrono")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "chrono")))]
     pub fn from_chrono_date_time(
         dt: &chrono::DateTime<chrono::Utc>,
         res: FractionalResolution,
         leap_seconds: u32,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CucError> {
         // Year before CCSDS epoch is invalid.
         if dt.year() < 1958 {
-            return Err(TimestampError::DateBeforeCcsdsEpoch(UnixTime::from(*dt)));
+            return Err(DateBeforeCcsdsEpochError(UnixTime::from(*dt)).into());
         }
         let counter = dt
             .timestamp()
             .checked_add(i64::from(leap_seconds))
-            .ok_or(TimestampError::Cuc(CucError::LeapSecondCorrectionError))?;
+            .ok_or(CucError::LeapSecondCorrectionError)?;
         Self::new_generic(
             WidthCounterPair(4, counter as u32),
             fractional_part_from_subsec_ns(res, dt.timestamp_subsec_nanos() as u64),
         )
-        .map_err(|e| e.into())
     }
 
     /// Generates a CUC timestamp from a UNIX timestamp with a width of 4. This width is able
     /// to accomodate all possible UNIX timestamp values.
-    pub fn from_unix_stamp(
+    pub fn from_unix_time(
-        unix_stamp: &UnixTime,
+        unix_time: &UnixTime,
         res: FractionalResolution,
         leap_seconds: u32,
-    ) -> Result<Self, TimestampError> {
+    ) -> Result<Self, CucError> {
-        let counter = unix_epoch_to_ccsds_epoch(unix_stamp.secs);
+        let counter = unix_epoch_to_ccsds_epoch(unix_time.secs);
         // Negative CCSDS epoch is invalid.
         if counter < 0 {
-            return Err(TimestampError::DateBeforeCcsdsEpoch(*unix_stamp));
+            return Err(DateBeforeCcsdsEpochError(*unix_time).into());
         }
         // We already excluded negative values, so the conversion to u64 should always work.
         let mut counter = u32::try_from(counter).map_err(|_| CucError::InvalidCounter {
@@ -431,19 +449,31 @@ impl CucTime {
         })?;
         counter = counter
             .checked_add(leap_seconds)
-            .ok_or(TimestampError::Cuc(CucError::LeapSecondCorrectionError))?;
+            .ok_or(CucError::LeapSecondCorrectionError)?;
         let fractions =
-            fractional_part_from_subsec_ns(res, unix_stamp.subsec_millis() as u64 * 10_u64.pow(6));
+            fractional_part_from_subsec_ns(res, unix_time.subsec_millis() as u64 * 10_u64.pow(6));
-        Self::new_generic(WidthCounterPair(4, counter as u32), fractions).map_err(|e| e.into())
+        Self::new_generic(WidthCounterPair(4, counter as u32), fractions)
     }
 
-    pub fn new_u16_counter(counter: u16) -> Self {
+    /// Most generic constructor which allows full configurability for the counter and for the
-        // These values are definitely valid, so it is okay to unwrap here.
+    /// fractions.
-        Self::new_generic(
+    pub fn new_generic(
-            WidthCounterPair(2, counter as u32),
+        width_and_counter: WidthCounterPair,
-            FractionalPart::new_with_seconds_resolution(),
+        fractions: FractionalPart,
-        )
+    ) -> Result<Self, CucError> {
-        .unwrap()
+        Self::verify_counter_width(width_and_counter.0)?;
+        if width_and_counter.1 > (2u64.pow(width_and_counter.0 as u32 * 8) - 1) as u32 {
+            return Err(CucError::InvalidCounter {
+                width: width_and_counter.0,
+                counter: width_and_counter.1.into(),
+            });
+        }
+        Self::verify_fractions_value(fractions)?;
+        Ok(Self {
+            pfield: Self::build_p_field(width_and_counter.0, fractions.resolution),
+            counter: width_and_counter,
+            fractions,
+        })
     }
 
     pub fn ccsds_time_code(&self) -> CcsdsTimeCode {
@@ -454,7 +484,7 @@ impl CucTime {
         self.counter
     }
 
-    pub fn width(&self) -> u8 {
+    pub fn counter_width(&self) -> u8 {
         self.counter.0
     }
 
@@ -489,25 +519,6 @@ impl CucTime {
         }
     }
 
-    pub fn new_generic(
-        counter: WidthCounterPair,
-        fractions: FractionalPart,
-    ) -> Result<Self, CucError> {
-        Self::verify_counter_width(counter.0)?;
-        if counter.1 > (2u64.pow(counter.0 as u32 * 8) - 1) as u32 {
-            return Err(CucError::InvalidCounter {
-                width: counter.0,
-                counter: counter.1.into(),
-            });
-        }
-        Self::verify_fractions_value(fractions)?;
-        Ok(Self {
-            pfield: Self::build_p_field(counter.0, fractions.resolution),
-            counter,
-            fractions,
-        })
-    }
-
     fn build_p_field(counter_width: u8, resolution: FractionalResolution) -> u8 {
         let mut pfield = P_FIELD_BASE;
         if !(1..=4).contains(&counter_width) {
@@ -856,7 +867,7 @@ mod tests {
         // Do not include leap second corrections, which do not apply to dates before 1972.
         let zero_cuc = CucTime::new(0);
         assert_eq!(zero_cuc.len_as_bytes(), 5);
-        assert_eq!(zero_cuc.width(), zero_cuc.width_counter_pair().0);
+        assert_eq!(zero_cuc.counter_width(), zero_cuc.width_counter_pair().0);
         assert_eq!(zero_cuc.counter(), zero_cuc.width_counter_pair().1);
         let ccsds_cuc = zero_cuc.to_leap_sec_helper(0);
         assert_eq!(ccsds_cuc.ccdsd_time_code(), CcsdsTimeCode::CucCcsdsEpoch);
@@ -904,7 +915,7 @@ mod tests {
     #[test]
     fn test_datetime_now() {
         let now = chrono::Utc::now();
-        let cuc_now = CucTime::from_now(FractionalResolution::SixtyNs, LEAP_SECONDS);
+        let cuc_now = CucTime::now(FractionalResolution::SixtyNs, LEAP_SECONDS);
         assert!(cuc_now.is_ok());
         let cuc_now = cuc_now.unwrap();
         let ccsds_cuc = cuc_now.to_leap_sec_helper(LEAP_SECONDS);
@@ -1242,6 +1253,7 @@ mod tests {
         );
         assert_eq!(stamp.fractions().counter(), 0);
         let res = stamp.update_from_now(LEAP_SECONDS);
+
         assert!(res.is_ok());
     }
 
@@ -1370,19 +1382,11 @@ mod tests {
         assert_eq!(cuc.counter(), dt.timestamp() as u32 + LEAP_SECONDS);
     }
 
-    #[test]
-    fn test_new_u16_width() {
-        let cuc = CucTime::new_u16_counter(0);
-        assert_eq!(cuc.width(), 2);
-        assert_eq!(cuc.counter(), 0);
-    }
-
     #[test]
     fn from_unix_stamp() {
         let unix_stamp = UnixTime::new(0, 0);
-        let cuc =
+        let cuc = CucTime::from_unix_time(&unix_stamp, FractionalResolution::Seconds, LEAP_SECONDS)
-            CucTime::from_unix_stamp(&unix_stamp, FractionalResolution::Seconds, LEAP_SECONDS)
+            .expect("failed to create cuc from unix stamp");
-                .expect("failed to create cuc from unix stamp");
         assert_eq!(
             cuc.counter(),
             (-DAYS_CCSDS_TO_UNIX * SECONDS_PER_DAY as i32) as u32 + LEAP_SECONDS
@@ -1405,7 +1409,7 @@ mod tests {
 
     #[test]
     fn test_stamp_to_vec() {
-        let stamp = CucTime::new_u16_counter(100);
+        let stamp = CucTime::new(100);
         let stamp_vec = stamp.to_vec().unwrap();
         let mut buf: [u8; 16] = [0; 16];
         stamp.write_to_bytes(&mut buf).unwrap();

src/time/mod.rs

@@ -33,6 +33,7 @@ pub const NANOS_PER_SECOND: u32 = 1_000_000_000;
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum CcsdsTimeCode {
     CucCcsdsEpoch = 0b001,
     CucAgencyEpoch = 0b010,
@@ -65,13 +66,27 @@ pub fn ccsds_time_code_from_p_field(pfield: u8) -> Result<CcsdsTimeCode, u8> {
 
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub struct DateBeforeCcsdsEpochError(UnixTime);
+
+impl Display for DateBeforeCcsdsEpochError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
+        write!(f, "date before ccsds epoch: {:?}", self.0)
+    }
+}
+
+#[cfg(feature = "std")]
+impl Error for DateBeforeCcsdsEpochError {}
+
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[non_exhaustive]
 pub enum TimestampError {
     InvalidTimeCode { expected: CcsdsTimeCode, found: u8 },
     ByteConversion(ByteConversionError),
     Cds(cds::CdsError),
     Cuc(cuc::CucError),
-    DateBeforeCcsdsEpoch(UnixTime),
     CustomEpochNotSupported,
 }
 
@@ -93,9 +108,6 @@ impl Display for TimestampError {
             TimestampError::ByteConversion(e) => {
                 write!(f, "time stamp: {e}")
             }
-            TimestampError::DateBeforeCcsdsEpoch(e) => {
-                write!(f, "datetime with date before ccsds epoch: {e:?}")
-            }
             TimestampError::CustomEpochNotSupported => {
                 write!(f, "custom epochs are not supported")
             }
@@ -114,6 +126,7 @@ impl Error for TimestampError {
         }
     }
 }
+
 impl From<cds::CdsError> for TimestampError {
     fn from(e: cds::CdsError) -> Self {
         TimestampError::Cds(e)
@@ -127,7 +140,6 @@ impl From<cuc::CucError> for TimestampError {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
 pub mod std_mod {
     use crate::time::TimestampError;
     use std::time::SystemTimeError;
@@ -135,7 +147,7 @@ pub mod std_mod {
 
     #[derive(Debug, Clone, Error)]
     pub enum StdTimestampError {
-        #[error("system time error: {0}")]
+        #[error("system time error: {0:?}")]
         SystemTime(#[from] SystemTimeError),
         #[error("timestamp error: {0}")]
         Timestamp(#[from] TimestampError),
@@ -143,7 +155,6 @@ pub mod std_mod {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
 pub fn seconds_since_epoch() -> f64 {
     SystemTime::now()
         .duration_since(SystemTime::UNIX_EPOCH)
@@ -178,7 +189,6 @@ pub const fn ccsds_epoch_to_unix_epoch(ccsds_epoch: i64) -> i64 {
 }
 
 #[cfg(feature = "std")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
 pub fn ms_of_day_using_sysclock() -> u32 {
     ms_of_day(seconds_since_epoch())
 }
@@ -199,7 +209,6 @@ pub trait TimeWriter {
     fn write_to_bytes(&self, bytes: &mut [u8]) -> Result<usize, TimestampError>;
 
     #[cfg(feature = "alloc")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
     fn to_vec(&self) -> Result<alloc::vec::Vec<u8>, TimestampError> {
         let mut vec = alloc::vec![0; self.len_written()];
         self.write_to_bytes(&mut vec)?;
@@ -238,13 +247,11 @@ pub trait CcsdsTimeProvider {
     }
 
     #[cfg(feature = "chrono")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "chrono")))]
     fn chrono_date_time(&self) -> chrono::LocalResult<chrono::DateTime<chrono::Utc>> {
         chrono::Utc.timestamp_opt(self.unix_secs(), self.subsec_nanos())
     }
 
     #[cfg(feature = "timelib")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "timelib")))]
     fn timelib_date_time(&self) -> Result<time::OffsetDateTime, time::error::ComponentRange> {
         Ok(time::OffsetDateTime::from_unix_timestamp(self.unix_secs())?
             + time::Duration::nanoseconds(self.subsec_nanos().into()))
@@ -258,6 +265,7 @@ pub trait CcsdsTimeProvider {
 /// similarly to other common time formats and libraries.
 #[derive(Default, Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct UnixTime {
     secs: i64,
     subsec_nanos: u32,
@@ -341,8 +349,7 @@ impl UnixTime {
     }
 
     #[cfg(feature = "std")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "std")))]
+    pub fn now() -> Result<Self, SystemTimeError> {
-    pub fn from_now() -> Result<Self, SystemTimeError> {
         let now = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)?;
         let epoch = now.as_secs();
         Ok(Self::new(epoch as i64, now.subsec_nanos()))
@@ -353,20 +360,18 @@ impl UnixTime {
         self.secs as f64 + (self.subsec_nanos as f64 / 1_000_000_000.0)
     }
 
-    pub fn secs(&self) -> i64 {
+    pub fn as_secs(&self) -> i64 {
         self.secs
     }
 
     #[cfg(feature = "chrono")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "chrono")))]
     pub fn chrono_date_time(&self) -> chrono::LocalResult<chrono::DateTime<chrono::Utc>> {
         Utc.timestamp_opt(self.secs, self.subsec_nanos)
     }
 
     #[cfg(feature = "timelib")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "timelib")))]
     pub fn timelib_date_time(&self) -> Result<time::OffsetDateTime, time::error::ComponentRange> {
-        Ok(time::OffsetDateTime::from_unix_timestamp(self.secs())?
+        Ok(time::OffsetDateTime::from_unix_timestamp(self.as_secs())?
             + time::Duration::nanoseconds(self.subsec_nanos().into()))
     }
 
@@ -385,7 +390,6 @@ impl UnixTime {
 }
 
 #[cfg(feature = "chrono")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "chrono")))]
 impl From<chrono::DateTime<chrono::Utc>> for UnixTime {
     fn from(value: chrono::DateTime<chrono::Utc>) -> Self {
         Self::new(value.timestamp(), value.timestamp_subsec_nanos())
@@ -393,7 +397,6 @@ impl From<chrono::DateTime<chrono::Utc>> for UnixTime {
 }
 
 #[cfg(feature = "timelib")]
-#[cfg_attr(doc_cfg, doc(cfg(feature = "timelib")))]
 impl From<time::OffsetDateTime> for UnixTime {
     fn from(value: time::OffsetDateTime) -> Self {
         Self::new(value.unix_timestamp(), value.nanosecond())
@@ -650,7 +653,7 @@ mod tests {
     fn test_addition() {
         let mut stamp0 = UnixTime::new_only_secs(1);
         stamp0 += Duration::from_secs(5);
-        assert_eq!(stamp0.secs(), 6);
+        assert_eq!(stamp0.as_secs(), 6);
         assert_eq!(stamp0.subsec_millis(), 0);
         let stamp1 = stamp0 + Duration::from_millis(500);
         assert_eq!(stamp1.secs, 6);
@@ -679,7 +682,7 @@ mod tests {
 
     #[test]
     fn test_from_now() {
-        let stamp_now = UnixTime::from_now().unwrap();
+        let stamp_now = UnixTime::now().unwrap();
         let dt_now = stamp_now.chrono_date_time().unwrap();
         assert!(dt_now.year() >= 2020);
     }

src/util.rs

@@ -77,7 +77,6 @@ pub trait UnsignedEnum {
     fn value(&self) -> u64;
 
     #[cfg(feature = "alloc")]
-    #[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
     fn to_vec(&self) -> alloc::vec::Vec<u8> {
         let mut buf = alloc::vec![0; self.size()];
         self.write_to_be_bytes(&mut buf).unwrap();
@@ -132,6 +131,7 @@ impl Error for UnsignedByteFieldError {}
 /// Type erased variant.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct UnsignedByteField {
     width: usize,
     value: u64,
@@ -221,6 +221,7 @@ impl UnsignedEnum for UnsignedByteField {
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct GenericUnsignedByteField<TYPE: Copy + Into<u64>> {
     value: TYPE,
 }