Hello every body
i have a question about AVT Guppy F-036B.
This camera present the HDR feature (as you can see in this Tech Man v7.1.0
The configuration register for HDR is *0xF1000280* (HDR_CONTROL), in
particular we have to read/write the bit 6 (not the 6th bit but only *bit 6*
I use *Coriander 2.0* under *Ubuntu Karmic* to control some register of this
camera (such as, Shutter ranges, or check its value ecc..), in particular in
section *Tools* *>**Direct Register Access**.*
Here i select *Command Base Register* as Offset and than i calculate the
corresponding value to insert in the *Addres* space.
For do this i subtract the *0xF1000280* to the *0xF0F00000* (the base
address for the control registers of the camera) and obtain *0x100280*.
Now press *Read>>* button.
(You can do the same operation selecting as Offset Base and use
So i read from *Data* space the value *80000200* that tell me HDR is present
as Feature but at the moment is Disabled (take particula attention to bit
positions in Pag. 225 of the Tech Man ).
If i try to enable HDR mode writing *8*2*000200* (set high the bit 6 and
don't modify the others bits), the register don't retain the new value.
There are other two interesting thing:
1) The ADV_INQ_1 register present the functionality HDR as available (bit
11); value readed Fa938401
2) The knee points registers (KNEEPOINT_1, KNEEPOINT_2 and KNEEPOINT_3)
contain all 00000000!
If someone have much experience with Coriander+Guppy and can help.
I resolved the question.
to work with this HDR feature we also have to define the 'KneePoints'
register. This would mean that we have to write 82000202 for two KneePoints
or 82000201 for one to the register F1000280.
By default the KNEEPOINT_1 and _2 and _3 are 0, so to see some changes in
try to modify the content of the KNEEPOINT_1 register if yuo use only the
first knee point.
At the moment i don't know what is the relationship between the content of
the register and the real Knee Voltage..
.. i'm hold on for a respons by AVT support.