Frame type:          FT_EVENT
Source:              SD_USDT
Source Channel:      Vehicle Network Protocol Channel ID
Destination:         SD_CLIENT
Destination Channel: Client ID

Description

The gusdt client sends this event to the last registered client for a channel when a sequence error or timeout occurs while receiving a USDT message from a CAN channel. A timeout event is sent if the first frame or the flow control frame is not received when receiving or sending a USDT message from or to a CAN channel. An informational event may be sent when the last frame of a USDT message is sent or when the first and last frames of a USDT message are received. USDT registration options determine whether or not the informational events are sent.

Event Data Format

Event	Header length (bytes)	Reserved	Frame ID
1 byte	1 byte	2 bytes	4 bytes

Note:

If the Frame ID is two bytes long , it will be right justified in the four byte field. That is, data bytes 6 and 7 will contain the Frame ID and bytes 4 and 5 will not be used.

Event
 

USDT_DONE	A complete USDT message has been transmitted.
USDT_SEQ_ERR	A sequence error has occurred.
USDT_TIMEOUT	A timeout has occurred
USDT_FIRSTFRAME	The first frame of a USDT message has arrived
USDT_LASTFRAME	The last frame of a USDT message has arrived