danieldeer/hdp

HDP is a command-line utility that turns raw binary input and a JSON packet specification into a generated binary packet. The CLI reads both inputs, invokes packet generation, and writes the result. Packet assembly handles field layout, input embedding, padding, length fields, and CRCs using the declared field and length-encoding types. The tree also contains CCSDS packet and transfer-frame specifications; their runtime use is not shown in the excerpts, so no connection to them is asserted.