Description of the data path
STINGRAY Technical Manual
V4.4.2
169
•
Host sends a list with parameters to the camera (advanced feature
space)
•
Microcontroller processes that list
•
All parameters will become active for the same image
•
Dependent on timing mode, the camera will:
–
Standard Format Change Mode
: use the previous parameters until
the new parameter set is copied to the FPGA
–
Quick Format Change Mode
(QFCM)
: waits until all parameters have
been copied to the FPGA and may interrupt an already started inte-
gration for a new integration with the new settings
Example of parameter list:
The exact sequence is:
Block-write (this needs to be a functionality of the underlying software stack
(e.g. AVT FirePackage). It may not be available for third party IIDC software
stacks.) of list to advanced feature address
Camera timing behavior is like this:
Address
Value
0xF0F0081C
0x80000100
0xF0F00820
0x800000ac
0xF0F00818
0x82000001
...
...
Table 50: Example of parameter list
Fast Parameter Update Timing
Quick Format Change Mode (QFCM)
After block write command is processed in the
camera all changed parameters are valid for the
available next image. Frame rate is constant.
After transfer of the parameter list via block write
a current transfer will be finished. A started expo-
sure will be interrupted until the microcontroller
has processed the list and copied it into the FPGA.
Exposure of the next image with new parameters
is started.
There may be a gap between two images.
Table 51:
Parameter-List Update
: comparison of standard timing and
QFCM