start adding improved CCSDS packet support

src/crc.rs

@@ -1,3 +1,7 @@
+//! # CRC checksum support.
+//!
+//! Thin wrapper around the [crc] crate.
+
 /// CRC algorithm used by the PUS standard, the CCSDS TC standard and the CFDP standard, using
 /// a [crc::NoTable] as the CRC implementation.
 pub const CRC_CCITT_FALSE_NO_TABLE: crc::Crc<u16, crc::NoTable> =

src/seq_count.rs

@@ -1,3 +1,8 @@
+//! # Sequence counter module.
+//!
+//! CCSDS and ECSS packet standard oftentimes use sequence counters, for example to allow detecting
+//! packet gaps. This module provides basic abstractions and helper components to implement
+//! sequence counters.
 use crate::MAX_SEQ_COUNT;
 use arbitrary_int::traits::Integer;
 use core::cell::Cell;

src/uslp/mod.rs

@@ -1,4 +1,4 @@
-/// # Support of the CCSDS Unified Space Data Link Protocol (USLP)
+//! # Support of the CCSDS Unified Space Data Link Protocol (USLP)
 use crate::{crc::CRC_CCITT_FALSE, ByteConversionError};
 
 /// Only this version is supported by the library