Message Types

Request Messages

Request messages are used by the target to request information/status from the host PC. These messages are pre-fixed with MSG_REQ. The PC should always respond with the corresponding response message, pre-fixed MSG_RES.

Table 1. Request Messages and Responses
Message Type	ID	Description
MSG_REQ_HANDSHAKE	0x00	Request handshake
MSG_RES_HANDSHAKE	0x10	Respond to handshake
MSG_REQ_STATUS	0x02	Request status from PC
MSG_RES_STATUS	0x12	Respond to status
MSG_RES_DATA	0x14	Raw data from PC to target

Configuration Messages

Used by target to send configuration settings to the PC. These messages are pre-fixed with MSG_CONF. The PC should respond to these messages with an acknowledge message (MSG_ACK).

Table 2. Configuration Messages, Target to PC
Message type	ID	Description
MSG_CONF_STREAM	0x20	Create a new stream
Reserved	0x21	Reserved for future use
MSG_CONF_GRAPH	0x22	Create new graph or reconfigure existing one
MSG_CONF_ADD_STREAM_TO_AXIS	0x23	Add stream to axis in graph
MSG_CONF_CURSOR_TO_GRAPH	0x24	Add parameter cursor to graph
Reserved	0x25	Reserved for future use
MSG_CONF_TERMINAL	0x26	Create new terminal or reconfigure existing one
MSG_CONF_ADD_TO_TERMINAL	0x27	Add stream to terminal
MSG_CONF_INFO	0x28	Info about the application
MSG_CONF_AXIS	0x29	Create new axis or reconfigure existing one
MSG_CONF_DASHBOARD	0x2A	Add dashboard container
MSG_CONF_DASHBOARD_ELEMENT	0x2B	Add element to dashboard container
MSG_CONF_ADD_STREAM_TO_ELEMENT	0x2C	Tie an already configured stream to an already configured dashboard element.

Table 3. Configuration Messages, PC to Target
Message type	ID	Description
MSG_CONF_ACK	0x30	Status of last received configuration message

Data Messages

Used by a target to send data to the PC. Prefixed with MSG_DATA. These messages should not be responded too.

Table 4. Data Messages
Message Type	ID	Description
MSG_DATA_STREAM	0x40	Send data from one or more streams