free-d Virtual Studio System Operators Guide - Vinten Radamec

Type D8 - EEPROM data
Free-d communication protocols
The D8 message is used for transferring EEPROM data from or to the free-d processing unit. If a D8
message is sent to the free-d processing unit the EEPROM is programmed with the data supplied, and the
free-d processing unit replies with a D8 message containing the new data.
The message contains 21 bytes:
Message type
Camera ID
EEPROM Address
...... 16 bytes of EEPROM data
Checksum
The EEPROM can only be programmed or read 16-bytes at a time. The EEPROM address within the
message corresponds to the address of the first byte of data transferred.
See Data structures for details of the format of the EEPROM database.
Type D9 - request EEPROM data
The D9 message is used to request the transfer of EEPROM data from the free-d processing unit. The unit
replies with a D8 message containing 16 bytes of EEPROM data.
The message contains 5 bytes:
Message type
Camera ID
EEPROM Address
Checksum
The EEPROM address determines the address of the first data byte to be transferred.
Type DA - camera calibration data
The DA message is used for transferring camera calibration data from the free-d processing unit. The data
corresponds to the camera currently in use. If a valid camera is not connected to the free-d processing unit,
or if the camera has only recently been connected, the data is invalid.
The message contains 30 bytes:
Message type
Camera ID
Lens X-Centre
Lens Y-Centre
Lens X-Scale
Lens Y-Scale
Lens Distortion A (radial, square term)
Publication Part No. V3975-4980 Issue 1 35