lasp / lasp/space_packet_parser
Support `RepeatEntry` for `ParameterRefEntry` elements in `EntryList`s
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- Dominant language
- Python
- Stars
- 39
- Forks
- 15
- Avg merge
- 2d 16h
- Merged PRs (30d)
- 12
Description
Section 5.3.3 (p. 235) of https://public.ccsds.org/Pubs/660x1g2.pdf
RepeatEntry allows repeating of a parameter N times where N is possibly a previous parameter value. This could be useful when downlinking arrays of a predictable size.
The principle challenge here is how to represent a repeated ParsedDataItem with a non-unique name (maybe made unique by the repeat number?). Like anything else, if the repeat number is a reference to another parameter, that parameter must occur before the repeated parameter in the data structure.
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Research direction
Start with the existing EntryList, ParameterRefEntry, and ParsedDataItem handling, using XTCE Section 5.3.3 as the behavioral reference. Define how RepeatEntry resolves its count and how repeated parsed items are represented without unique names; done means repeated parameter references are decoded correctly, including counts based on a preceding parameter.
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Assessment
- Tech stack
- python
- Domain
- backend
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100