Description of the data path
MARLIN Technical Manual
V2.4.0
90
Loading a shading image into the camera
GPDATA_BUFFER is used to load a shading image into the camera. Because
the size of a shading image is larger than GPDATA_BUFFER, input must be
handled in several steps: It is recommended that block writes are used to
write a block of n bytes with one command into the GPDATA_BUFFER. With
firmware 3.03 it is possible to write quadlets directly into the buffer, but this
takes much more time.
Figure 47: Loading the shading reference image
Note
L
Configuration
•
To configure this feature in an advanced register: See
Table 108: Advanced register: Shading
on page 214.
•
For information on GPDATA_BUFFER: See Chapter
GPDATA_BUFFER
on page 235.
Query Limits from
Register:
SHDG_INFO and
GPDATA_INFO
Set EnableMemWR
to true (1)
Set AddrOffset to 0
Write n databytes
in
GPDATA_BUFFER
Increase
AddrOffset by n
bytes
Check
EnableMemWR for
no change
Repeat Steps until
all data is written
Set EnableMemWR
to false (0)