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rshal2's avatar
rshal2
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Enabling bridges - When and How ?

I find the following warning: " Note: Before re-programming the FPGA fabric, make sure that the FPGA2HPS bridges (f2sdram, axi) are disabled, and that there is no software on HPS that may access th...
EBERLAZARE_I_Intel's avatar
EBERLAZARE_I_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago

Hi ranran,

As mentioned "Before re-programming", thus this is to make sure all previous settings and configurations are disabled and shut down. So that if you decide to reprogrammed your design, it can configure accordingly without having previous settings and configuration affecting the design that you decide to re-programmed.

Regards.

rshal2's avatar
rshal2
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hi,

I think the following page partly answers my question:

https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/embedded/2016/how-and-when-can-i-enable-the-fpga2sdram-bridge-on-cyclone-v-soc.html

If I understand correctly:

  1. The warning in my original question is solved by just stopping HPS application (Right?)
  2. enabling all bridge is done in preloader
  3. fpga2sdram seems like a special bridge, which requires to be enabled only in certain state.

In our case fpga is configured independently from HPS, so we can't use the method of enabling this bridge as done in the above link.

I am still not sure how we can achieve this after preloader application starts in sdram,.

Thanks,

ran