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Appendix B—Serial Communication Technical Details
Byte #
1
Process Code
2
Status
3
Reserved
4
Function
5
Byte Count (MSB)
6
Byte Count (LSB)
7
CRC1 (MSB)
8
CRC1 (LSB)
(Data)
...
(Data)
N
(Data)
N+1
CRC2 (MSB)
N+2
CRC2 (LSB)
B.3
Status Byte
For all reply messages, the camera sets the Status Byte as shown in Table B-3 to indicate the
receipt of the previous incoming message.
Status Byte
Value (hex)
0x00
CAM_OK
0x01
CAM _BUSY
0x02
CAM _NOT_READY
0x03
CAM _RANGE_ERROR
0x04
CAM _CHECKSUM_ERROR
0x05
CAM _UNDEFINED_PROCESS_ERROR
0x06
CAM _UNDEFINED_FUNCTION_ERROR
0x07
CAM _TIMEOUT_ERROR
0x09
CAM _BYTE_COUNT_ERROR
0x0A
CAM _FEATURE_NOT_ENABLED
B-2
Table B-2: Serial Packet Protocol
Upper Byte
Set to 0x6E on all valid incoming messages
Set to 0x6E on all outgoing replies
Table B-3
See
Table B-4
See
See argument data bytes in
Table B-3: Status Byte Definition
Definition
April 2009
Tau User's Manual
Comments
Table B-4
Description
Function executed
Camera busy processing serial command
Camera not ready to execute specified serial
command
Data out of range
Header or message-body checksum error
Unknown process code
Unknown function code
Timeout executing serial command
Byte count incorrect for the function code
Function code not enabled in the current
configuration.
TAU-0035-00-10, version 100
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