BMLite_RPi/hcp/doc/md/2_hcpframe.md

\page hcpf HCP frame format

The Host Communication Protocol (HCP) describes a general way of sending commands and information between devices.

\image html hcp.svg "HCP frame format" \image latex hcp.eps "HCP frame format"

\section cmd Command

The Commands define the general action that is going to be executed. However, each command can have several Arguments each with data attached.

CMD	Num Args	Payload
2 bytes	2 bytes	xx bytes

All fields are using unsigned data types.

\section arg Argument

The Argument is used as a complement to the command if it is needed and can contain arbitrary data.

ARG	Size	Data
2 bytes	2 bytes	size bytes

All fields are using unsigned data types.