SR Research Support Site
Data Fields
DMESSAGE Struct Reference

Message events: usually text but may contain binary data with floating point time. More...

Data Fields

double time
 
INT16 type
 
UINT16 length
 
byte text [260]
 

Detailed Description

Message events: usually text but may contain binary data with floating point time.

A message event is created by your experiment program, and placed in the EDF file. It is possible to enable the sending of these messages back through the link, although there is rarely a reason to do this. Although this method might be used to determine the tracker time (the time field of a message event will indicate when the message was received by the tracker), the use of eyelink_request_time() and eyelink_read_time() is more efficient for retrieving the current time from the eye tracker's timestamp clock. The eye tracker time is rarely needed in any case, and would only be useful to compute link transport delays.

Field Documentation

UINT16 length

length of message

byte text[260]

message contents (max length 255)

double time

time message logged

INT16 type

event type: usually MESSAGEEVENT


Copyright ©2002-2021, SR Research Ltd.