ALLIED Vision Technologies Marlin F-201 - Manual (Page 89)

Description of the data path
MARLIN Technical Manual V2.4.0
89
Loading a shading image out of the camera
GPDATA_BUFFER is used to load a shading image out of 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 reads are used to read
a block of n bytes with one command out of the GPDATA_BUFFER. With firm-
ware 3.03 it is possible to read quadlets directly out of the buffer, but this
takes much more time.
Figure 46: Uploading shading image to host
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 EnableMemRD
to true (1)
Set AddrOffset to 0
Read n databytes
of
GPDATA_BUFFER
Increase
AddrOffset by n
bytes
Check
EnableMemRD for
no change
Repeat Steps until
all data is read
Set EnableMemRD
to false (0)