FPGA Central

Hi,

I am usign the Xilinx xapp058 design to program another device on the
JTAG chain. In this design I download a xsvf file over a serial link
and once it's done, the processor will play the xsvf to configure the
other device. The xsvf file is played successfully. However, the done
pin of the device under configuration doesn't go high and the device
is not starting up.

If I go to impact and read the status register of that device, I will
get GHIGH = 1 meaning the configuration data is loaded correctly. And
if I do a "verify", the device will then wake up and run. So it looks
like I am lacking some startup instuctions in my xsvf file.

Anyone has an idea how I can solve it?

Thanks,
Yan

On Dec 1, 6:35 am, [email protected] wrote:
> Hi,
>
> I am usign the Xilinx xapp058 design to program another device on the
> JTAG chain. In this design I download a xsvf file over a serial link
> and once it's done, the processor will play the xsvf to configure the
> other device. The xsvf file is played successfully. However, the done
> pin of the device under configuration doesn't go high and the device
> is not starting up.
>
> If I go to impact and read the status register of that device, I will
> get GHIGH = 1 meaning the configuration data is loaded correctly. And
> if I do a "verify", the device will then wake up and run. So it looks
> like I am lacking some startup instuctions in my xsvf file.
>
> Anyone has an idea how I can solve it?
>
> Thanks,
> Yan

If 'done' is not going high, then the xsvf is NOT getting to the chip
properly, which probably means that it's not being "played
successfully."

Most likely you are missing the post-amble. Time to re-read the
documentation.

G.