ALLIED Vision Technologies Pike F-1600 - Manual (Page 186)

Description of the data path
PIKE Technical Manual V5.1.2
186
How to transfer parameters to the camera
The following 3 variants of transferring the parameters are available with the
firmware 3.x:
In the following you find a short description of each variant:
Encapsulated Update (begin/end)
The Encapsulated Update (begin/end) has the following characteristics:
• Host will set a parameter update begin flag in the camera (UpdActive Field
in Register 0xF1000570, see
Table 178: Advanced register: Update timing
modes on page 357)
• Host will send several parameters to the camera and then signalize end by
resetting the flag
• All parameters will become active for the same next image
• Dependent on timing mode, the camera
– (standard Update): uses the previous parameters until the update flag
(UpdActive Field in Register 0xF1000570) is reset
– (Quick Format Change Mode): Camera stops and waits until the
update flag (UpdActive Field in Register 0xF1000570) is reset.
In the Encapsulated Update (begin/end) the exact sequence is:
1. Parameter update begin (advanced feature register)
2. Standard IIDC register update (1..N register) (standard feature register)
3. Parameter update end (advanced feature register)
Transfer mode Advantage

Disadvantage

Encapsulated Update (begin/
end)  easy to use (standard quad
writes in camera register is
possible)
 one write access per register
access
Parameter-List Update  only one write access for all
parameters
 fastest hostcamera transfer
(from 5 parameters on faster
than encapsulated mode)
 handling of parameter list
easy
 not so easy to use (block
writes)
 max. 64 entries for parameter
list
Standard Update (IIDC)  compliant with IIDC V1.31  non deterministic change of
parameters
Table 54: Comparison of 3 transfer modes