Data acquisition from adc with external clock with DCMI

Hello,

I have a NUCLEO-L4R5ZI. I try to test data aquisition by ST MCU from external clock at 10 MHz. I use DCMI interface.

In my test, I use a FPGA to generate clock and data connected to the Nucleo that includes DCMI interface. I did not succeed in going into HAL_DCMI_FrameEventCallback (I have connect FPGA clock to PA6 pin DCMI_PIXCLK). That means my buffer is not getting data from DMA. Do you why? Is there an error in my code ?

I attached my code.

Thank you,

Best regards,

Patrice