Aviation Protocol Decoders? 1553 and ARINC-429?

Has anyone in the community created decoders for common aviation standards like MIL-1553 and ARINC-429? These seem like they should be simple to create and wondered if these already exist as supported or community created protocols?

If not, is there a suggested protocol template I could use to start writing my own protocol decoder? MIL-1553 is Manchester encoded. 429 is RTZ encoded.

The Associated WIKI page has great info on the bits and bytes.