Allied Vision Technologies Pike F-032B, Техническое руководство

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Pike Technical Manual V5.2.3
154
Description of the data path
Description of the data path
How to transfer parameters to the camera
The following 3 variants of transferring the parameters are available with the
firmware 3.×:
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 181: Advanced register: Update
timing modes on page 317)
• 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)
Camera timing behavior is described in the following table.
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 is
easy
• not so easy to use (block
writes)
• maximum 64 entries for
parameter list
Standard Update (IIDC) • compliant with IIDC V1.31 • non deterministic change of
parameters
Table 55: Comparison of three transfer modes