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TNguy162's avatar
TNguy162
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6 years ago

Issue of using F2H bridge on Arria 10 to access H2F_LW.

Hi everyone, I have an issue related to using F2H bridge to access registers on FPGA via H2F_LW bridge. As I read from the Arria 10 HPS technical reference manual, from the address table of page 37...
EBERLAZARE_I_Intel's avatar
EBERLAZARE_I_Intel
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6 years ago

Hi,

Do you have any more question?

TNguy162's avatar
TNguy162
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6 years ago

Hi el.ign,

Sorry for a late reply.

I read the device guidelines but I cannot find the reason why I cannot send a command from f2h bridge to h2f_lightweight since we have the address as the above picture.

We changed our design and don't use f2h bridge anymore.

Thanks for your information.

Best Regards,

Joe

  • EBERLAZARE_I_Intel's avatar
    EBERLAZARE_I_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi Joe,

    Thanks for the follow up.

    Based on my knowledge, the h2f_lightweight are intended for control or status registers, there will be an issue when is used for other usage.

    Best Regards.

  • TNguy162's avatar
    TNguy162
    Icon for New Contributor rankNew Contributor
    6 years ago

    Hi el.ign,

    Thanks for your information.

    We used it for accessing status register too. However, we used F2H bridge to forward the data to h2f_lw to write to status registers. Somehow it does not work.

    Anyway, we changed the design and it's ok now.

    Thanks for your help.

    By the way, this is another issue. If I have APB interface working at 100MHz clock domain and it writes to registers working at 250MHz clock domain. I need to handle these two clock domains so I used another APB interface which has 250MHz clock and put it in between the APB-100MHz and registers. I found that Platform Designer inserts clock crossing adapter between APB-100MHz and APB-250MHz. I don't know whether if it is safe to let Platform Designer insert Clock crossing adapter or we should handle manually. What is the best practice in this case? Would you please share some experiences or share some documents about this issue? I appreciate your help.

    Thank you so much.

    Best Regards,

    Joe