Forum Discussion

NZhan1's avatar
NZhan1
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

两次编译收发器产生不同现象，但时序分析都是过的

Hi 有个比较奇怪的现象，Q17.1.2Pro编译出来的A.jic,下载到12块A10板卡上，有一块板子的1G/10GbE and 10Gbase-KR PHY的TX通道测试没有发出数据，而位于同一个PHY的RX通道却是正常的。工程里根据参考设计做了时序约束，只有几条时序违例：JTAG的相关时钟，FPGA给光模块disable信号，link引出的指示灯信号。 再次编译出B.jic，下进去就没...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi Nicole,

For your information, the project that you are sharing seems of relatively large file. I am unable to download the project. Sorry for the inconvenience.

However, as per my previous note, this seems unlikely to be related to timing as it only occurs in a specific board but not others. Would you mind to share with me the top level SDC file so that I can have a quick look?

Please help to ask our customer to perform the debugging as recommended in my previous notes.

Please let me know if there is any concern. Thank you.

Best regards,

Chee Pin

  • NZhan1's avatar
    NZhan1
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago
    Hi Chee Since I can’t login the Forum right now. So I send the top sdc to your personal email. And currently, customer upgrade the project to 18.1Pro, and the tx failure issue occurs everytime after rerun compilation. And the TX failure issue happens on many other boards. It is not just on one board now. There are some changes of timing constrains requirements between 17.1pro and 18.1pro. will these be the reason of TX failure? Thanks! Regards， Nicole
    • CheepinC_altera's avatar
      CheepinC_altera
      Icon for Regular Contributor rankRegular Contributor
      5 years ago
      Hi, For your information, due to the change in the observation, it is rather difficult to tell what might be wrong. Please help to perform the debug items as in my previous note. You may want to prioritize the serial loopback and the simple native PHY design testing. Also, would you mind to elaborate if our customer is using oscilloscope to check on the TX output signal? If not, how did they check the signal when they are referring to no output. Thank you. Best regards, Chee Pin
    • NZhan1's avatar
      NZhan1
      Icon for Occasional Contributor rankOccasional Contributor
      5 years ago
      Hi Chee, Customer uses two boards connected together to test if it has output or not. Thanks! Regards， Nicole
    • CheepinC_altera's avatar
      CheepinC_altera
      Icon for Regular Contributor rankRegular Contributor
      5 years ago
      Hi Nicole, Thanks for your update. For your information, when our customer is connecting two board together, it is rather difficult to tell if it is TX no output or there is other issue which lead to the link not up. Thus, I would recommend our customer to using one board, the probe the output signal with oscilloscope to check on the TX signal. This will be helpful to further narrow down the issue. Thank you. Best regards, Chee Pin