Instruction manual

Description of the data path
The table below describes the registers required.
Register Name Field Bit Description
0xF1000250 SHDG_CTRL Presence_Inq [0] Indicates
presence of this
feature (read
only).
BuildError [1] tbd
--- [2..3]
ShowImage [4] Show shading
data as image.
BuildImage [5] Build a new
ShadingImage.
ON_OFF [6] Shading On/Off.
Busy [7] Build in progress.
--- [8..23]
GrabCount [24..31] Number of images
0xF1000254 SHDG_MEM_CTRL Presence_Inq [0] Indicates
presence of this
feature (read
only).
--- [1..4]
EnableMemWR [5] Enable write
access.
EnableMemRD [6] Enable read
access.
--- [7]
AddrOffset [8..31] Bytes
0xF1000258 SHDG_INFO Presence_Inq [0] Indicates
presence of this
feature (RD only).
--- [1..7]
MaxImageSize [8..31] Max shading Img.
size (Bytes).
Table 39: Shading control register

The maximum value of GRAB_COUNT depends on the type of camera and the number of
frame buffers that exis tically corrected to the power of
The SHDG_CTRL register should not be queried at very short intervals This is because each
t. GRAB_COUNT is also automa
two.

query delays the generation of the shading image. An optimal interval time is 500 ms.
MARLIN Technical Manual
Page 72