09-09-2020, 02:52 PM
By default, the Analog card option of the EyeLink Host PC will output 3 channels (gaze x, gaze y, & pupil size) of analog data per eye recorded. The break out board provided with the system will have these channels split out into BNC connectors for easy interfacing with other analog recording devices.
The Analog card also has 16 bit digital input/output channels which can be utilized by the Host PC. The digital inputs may be defined as buttons, used for controlling the EyeLink tracker, or recorded to the EDF data file. Similarly, The outputs may be controlled by using ‘write_ioport’ commands sent from your Display PC via the dedicated Ethernet link, or used by the EyeLink tracker for data strobes and other functions. The command requires the port address (typically 4 or 5 for the analog card) and the 16 bit Hex value you want written to the card
See Section 7.4 Digital Inputs and Outputs of the User Manual for more information on setting up the analog card for sending and receiving TTL triggers.
The Analog card also has 16 bit digital input/output channels which can be utilized by the Host PC. The digital inputs may be defined as buttons, used for controlling the EyeLink tracker, or recorded to the EDF data file. Similarly, The outputs may be controlled by using ‘write_ioport’ commands sent from your Display PC via the dedicated Ethernet link, or used by the EyeLink tracker for data strobes and other functions. The command requires the port address (typically 4 or 5 for the analog card) and the 16 bit Hex value you want written to the card
Code:
#write_ioport <ioport> <data>
;; <ioport>: byte hardware I/O port address
;; <data>: data to write
write_ioport 0x4 0xFFSee Section 7.4 Digital Inputs and Outputs of the User Manual for more information on setting up the analog card for sending and receiving TTL triggers.
- EyeLink Portable Duo User Manual
- EyeLink 1000 Plus User Manual
- EyeLink 1000 User Manual
- EyeLink II - Head Mounted / Head Fixed User Manual