Kramer VS-44HDCP, User Manual

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40 VS-44HDCP - Protocol 3000
11.3.1 Packet Protocol Structure
The packet protocol is designed to transfer large amounts of data, such as files, IR
commands, EDID data, and so on.
11.3.1.1 Using the Packet Protocol
To use the packet protocol:
1. Send a command: LDEDID
2. Receive Ready or ERR###
3. If Ready:

Send a packet

Receive OK on the last packet

Receive OK for the command
4. Packet structure:
 Packet ID (1, 2, 3…) (2 bytes in length)

Length (data 2 for CRC) - (2 bytes in length)

Data (data length -2 bytes)

CRC - 2 bytes
10 10 10 10 05…
Packet ID Length Data CRC
5. Response:
~ NNNN SP OK CR LF
Where NNNN is the received packet ID in ASCII hex digits.