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Description of the data path
OSCAR Technical Manual V2.4.0
82
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 3.04 it is possible to
write quadlets directly into the buffer, but this takes much more time.
Figure 37: Loading the shading reference image
Note
L
Configuration
• To configure this feature in an advanced register: See
Table 90: Advanced register: Shading on page 188.
• For information on GPDATA_BUFFER: See Chapter
GPDATA_BUFFER on page 201.
Query limits from
register:
SHDG_INFO and
GPDATA_INFO
Set EnableMemWR
to true (1)
Set AddrOffset to 0
Write n databytes
in
GPDATA_BUFFER
Offset is increased
in camera after n
bytes are written
Check
EnableMemWR for
no change
Repeat steps until
all data is read
Set EnableMemWR
to false (0)