will add a module or IP change the performance? (combining SDI and SGDMA)

Hi Socrates

I just found two unassigned IO pins which should be connected to SDI cable driver IC.

After I assign correct IO pins, the combined project works stable.

So I move on to write the C program running on NIOS II CPU to control the SGDMA.

A new problem occurs which makes SDI receiver reset.

If I declare the video frame buffer in "stack" of DDR3, the downloading process of elf file is slow. (about 5 second...)

alt_u8 video_buf __attribute__((section(".ddr3")));

I guess this slow process somehow makes SDI receiver reset.

(rx_status[1] is 1'b1)

So I allocate video frame buffer in "heap" of DDR3 to solve the slow downloading problem and it works.

(rx_status[4] which indicates frame locked is 1'b1)

Thank you for your help.:)