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tibor1's avatar
tibor1
Icon for New Contributor rankNew Contributor
5 years ago
Solved

altera_remote_update: Set application image address (Cyclone V)

Hello all, Consider the following use case: Hardware: Cyclone V + EPCQ256 There are three fpga configuration images stored in flash memory: 1) Factory Image 2) Application Image #1 (slot 1)...
  • tibor1's avatar
    tibor1
    5 years ago

    Thank you for your reply.

    I am using the page select signal in order to provide that remote update core with my desired flash address. In order to determine which application image to load, I am using a flash sector to store boot information, which i read before loading the application.

    Kind regards.

YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi Tibor,


When you mentioned about valid, are you saying that you are looking for something which will check the bitstream validity from application image 1/2 and then program it if it is valid?


Thank You


tibor1's avatar
tibor1
Icon for New Contributor rankNew Contributor
5 years ago

Hi,

Thank you for your reply.

No, i know about the POF-checking-feature and this is not what I mean by valid (if that is, what you were going to say). What I mean is "most recent". HPS-Software can write the Flash-Memory via a Flash Controller in the FPGA. In case of a FPGA-Update, the HPS writes the new configuration File into another Page of the Flash. The old image is not overwritten, so that it can be used as a fallback in case the update fails.

I need a way to tell the FPGA Factory Image, which of the two application Images to choose. Also, I can't use Information contained in the HPS, because in my design, the FPGA boots first and the HPS boots from FPGA.

As I said, i could keep that Information somewhere in the same Flash and read it from FPGA and write some logic that decides which image to use, but I was hoping, that this use case was already covered. Especially, because Flash-Read-Logic already exists (for Configuration from Flash).