07-05-2019 05:28 PM
I am using CSI2 RX IP with video format bridge. Please see snapshot attached.
As per CSI2 RX spec (Page 8 , Table1-1), the width of AXIS TDATA for embedded data is 64 for RAW12
I cannot change the TDATA width to 64 as it is locked. I am not sure why. If I only if I dont choose the video format bridge then the TDATA width of embedded data gets unlocked and can be modified.
Let me know what is TDATA width for embedded data for RAW12 when video format bridge is selected
with 4 pixels per beat
08-07-2019 11:16 PM
07-10-2019 05:28 AM
The Table1-1 of Page 8 is only applicable for when the video bridge is not enabled.
If the video bridge is enabled, tdata is only used for transmitting data (no embedded data) the mapping follows the AXI-4 Stream rules for interconnecting Xilinx Video IPs (UG934).
Thus if you are configured for 4 pixels per clock in RAW12, TDATA width will be 4*12=48 bits. This is what you get if you check the IP port after the configuration.
Hope that clarifies
07-10-2019 07:04 AM
Thanks for the response
There are two AXIS Stream interfaces in CSI2-RX.
1) One is for Image Data
I understand from the Spec that when Video format bridge is selected, the width is 48 bit for RAW12 for 4 pixel per beat
2) Second is for Embedded Data
My question is related to embedded data. Why is coming locked as 32 bit.
07-10-2019 07:11 AM
In continuation to my previous reply, I am attaching snapshot of implementation netlist.
It shows AXIS bus for embedded data as 64 bit even though the GUI option locks it at 32 bit
07-10-2019 07:25 AM
Oh sorry I missed the option "Enable non-image interface".
It is just that if you have the video format bridge enable you cannot configure this parameters, your are getting assigned ones. Just ignore the values when the parameters are greyed out.
07-18-2019 08:27 AM
Do you have any update on this topic? Is everyting clear for you?
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07-22-2019 06:55 AM
07-22-2019 07:00 AM
I have reported this to development to have the correct value updated even when the option is greyed out
08-07-2019 11:16 PM