how to drive cfg_interrupt_stat & cfg_pciecap_interrupt_msgnum in 7-series integrated block for PCIe

[reshmaakhil]

Hi all,

I am using 7-series integrated block for PCIe for my Kintex-7 FPGA. 

I would like to generate legacy interrupts as per my requirement. In the example design all the signals related to interrupt management are tied to zero. So I thought of writing my own logic by refering to PG054. There is a timing diagram and steps related to legacy intererupt mode. But in the example design some extra signals are shown.

          cfg_interrupt_stat <= '0'; -- Never set the Interrupt Status bit
          cfg_pciecap_interrupt_msgnum <= "00000"; -- Zero out Interrupt Message Number

what could be the values of those signals to generate legacy interrupt? 

Any help is appreciated.

Thanks and regards,

Reshma 

[reshmaakhil · Accepted solution]

Hi,

We can tie this signals to zero. Without giving any other values to these signals also I was able to generate an INTA interrupt. 

Regards,

Reshma