Basler A640F, Руководство пользователя

Страница: 148 / 188

Smart Features
6-12
BASLER A640
f
DRAFT
6.7.3 Cycle Time Stamp
The cycle time stamp feature adds a chunk to each image frame containing the value of the
counters for the IEEE 1394 bus cycle timer. The counters are sampled at the start of exposure of
each image.
Control and Status Register for the Cycle Time Stamp Feature
Cycle Time Stamp Chunk Layout
L
The extended data stream feature (see Section 6.7.1 ) must be enabled in order to
use the cycle time stamp feature or any of the other smart feature that adds informa-
tion to the image data stream. Disabling the extended data stream feature switches
off all smart features that add information to the image data stream.
The cycle time stamp feature will only work when the camera is set for video format 7.
Name Cycle Time Stamp
Address See “Determining the Address of Smart Features CSRs” on page 6-4 .
CSR GUID 5590D58E - 1B84 - 11D8 - 8447 - 00105A5BAE55
Field Bit Description
Presence Inq
(Read only) [0] Presence of this feature
0: Not Available 1: Available
---- [1 ... 30] Reserved
Enable
(Read / write) [31] Enable / Disable this feature
0: Disable 1: Enable
Position Name Description
0 Cycle Time Stamp
[ 4 Bytes ] Field Bit Description
Second Count [0 ... 6] Counts the seconds. Wraps to
zero after 127 seconds.
Cycle Count [7 ... 19] Counts the 125 µs isochronous
bus cycles. Wraps to zero after
counting to 7999.
Cycle Offset [20 ... 31] Counts at 24.576 MHz and wraps
to zero after counting to 3071 (re-
sulting in a 125 µs cycle)
4 Chunk GUID
[ 16 Bytes ] 994DD430 - 1C0F - 11D8 - 8F6B - 00105A5BAE55
20 Chunk Length
[ 4 Bytes ] This chunk’s total length in bytes.
24 Inverted Chunk Length
[ 4 Bytes ] The bitwise complement of the chunk length.