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Vamsi_21's avatar
Vamsi_21
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

ethernet_100g_loopback_off

Hi, I have generated a low latency 100g design example by following the guide below: https://www.intel.com/content/www/us/en/docs/programmable/683371/16-1/quick-start-guide.html I tested the s...
Ethernet
Yi's avatar
Yi
Icon for New Contributor rankNew Contributor
2 years ago

Hi,

TCL run_test file should automatically enable the loopback mode for testing, it should also be logged as well, you may see this in ethernet_100g_loop_off.jpg screenshot.

  • Vamsi_21's avatar
    Vamsi_21
    Icon for Occasional Contributor rankOccasional Contributor
    2 years ago

    Hi,
    I have made loop_off in the main.tcl script to check without loopback but still it is showing the tx statistics.
    Below I am attaching the screenshots of the system console window.

    • Yi's avatar
      Yi
      Icon for New Contributor rankNew Contributor
      2 years ago

      It seems working as the Rx clk and recover clk are both 0Hz, and lock status = 0, though the MAC status looks weird to me either, would suggest to try some debug and see if the loop_off is correctly set or not first.

      the process is in the *\hwtest\altera\alt_aeu_40\eth_ultra_phy_inc.tcl :

      proc setphy_lpoff {} {
      global BASE_RXPHY
      global ADDR_PHY_PMALOOP
      # puts "RX PHY Register Access: Setting Serial PMA Loopback\n"
      reg_write $BASE_RXPHY $ADDR_PHY_PMALOOP 0x0
      reg_read $BASE_RXPHY $ADDR_PHY_PMALOOP
      }

      May edit the puts here to see if it's set or not first.

      • Vamsi_21's avatar
        Vamsi_21
        Icon for Occasional Contributor rankOccasional Contributor
        2 years ago

        Hi,
        I have kept some puts statements in the tcl scripts as you have suggested but for both loopback on and loopback off the rx clk=0 Hz, recover clk=0 Hz, lock status =0 and still it is showing both rx and tx mac stats.

        Iam sharing the tcl scripts and also I am attaching the screenshot of the system console window for both loopback on and loopback off.