RTOS/TDA2PXEVM: issCaptDrvCallback() is never called.

Part Number:TDA2PXEVM

Tool/software: TI-RTOS

Hi,

         We have a design about single radar and TDA2px evm board. The schematic is like this:  (AWR1243 [CSI-2]) -> ([CSI-2 in] [other processing] Lattice FPGA [CSI-2 out]) -> (TDA2px). I create a new usecase to receive the data from AWR1243. The radar can be programmed by TDA2px right now. In order to test the interface, I make the FPGA continuously send CSI-2 data to TDA2px. I also can clearly observe the csi-2 clk and data by oscilloscope. However, the issCaptDrvCallback is never called during testing.  Could you please let me know how the isscapture collect and verify the csi-2 data? What should I modified to launch isscapture if I don't use TI's reference design. 

Thank you,

Frank