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TMK's avatar
TMK
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7 years ago

FIFOed UART Qsys Generation Error with Qsys Standard v18.1

Hello,

when generating a FIFOed UART with Qsys Standard v18.1 as provided here

https://forums.intel.com/s/createarticlepage?language=en_US&articleid=a3g0P0000005RTHQA2&artTopicId=0TO0P000000MWKBWA4&action=view

I receive the following Qsys generation errors:

Info: tube_uart_0: Starting FIFOed UART Generation at C:/xy/Qsys/fifoed_uart

…

Info: tube_uart_0: Starting RTL generation for module 'f2flink_tube_uart_0'

…

Info: tube_uart_0:

Info: tube_uart_0: ERROR:

Info: tube_uart_0: no width for __0__/* synthesis keep */

Error: tube_uart_0: Failed to generate module f2flink_tube_uart_0

Info: tube_uart_0: Done RTL generation for module 'f2flink_tube_uart_0'

Info: tube_uart_0: "f2flink" instantiated fifoed_avalon_uart "tube_uart_0"

Error: Generation stopped, 15 or more modules remaining

This issue seems to be related to the Tx FIFO option (see screenshot).

Could you please let me know how this problem can be fixed and if a patch is available? Thank you.

Best regards,

Thomas

23 Replies

  • KennyT_altera's avatar
    KennyT_altera
    Icon for Super Contributor rankSuper Contributor
    7 years ago

    may I know what OS that you were using? I will try duplicate it and find the workaround for it.

    • TMK's avatar
      TMK
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      7 years ago

      I'm using Windows 7. Important information is that the problem only happens when generating VHDL (not Verilog) output and seems to be related to the synthesis directive.

  • KennyT_altera's avatar
    KennyT_altera
    Icon for Super Contributor rankSuper Contributor
    7 years ago

    I try it on VHDL and verilog, it get error. Where did you generate this IP? In the IP catalog or in the platform designer?

    This IP was created in Q13.1, at that time, it is still using megafunction (not IP catalog) and this IP does not exist in the megafucntion.

    You have use this IP in the platform designer. I try it on verilog and vhdl, I am using redhat. No error found when generating the IP.

    Thanks

    • TMK's avatar
      TMK
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      7 years ago

      Well, as mentioned earlier I generate this IP in Platform Designer, formerly Qsys. Did you copy the settings from the screenshot to reproduce the problem? Please perform the following steps to reproduce the problem:

      1. Create a Cyclone IV project
      2. Open Platform Designer
      3. Add a FIFOed UART instance
      4. Enable the Tx FIFO
      5. Set synthesis output to VHDL and generate the system
  • KennyT_altera's avatar
    KennyT_altera
    Icon for Super Contributor rankSuper Contributor
    7 years ago

    I am using Cyclone V, have ensure the same steps above. No eror.

    The only different that we have is I am using redhat. Do you have other computer to try out? like windows 10?

    • TMK's avatar
      TMK
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      7 years ago

      Why don't you use Windows 10? Could you please share the Qsys generation report and a screenshot with the IP configuration settings?

    • TMK's avatar
      TMK
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      7 years ago

      Thank you for the screenshots. My version is: Platform Designer 18.1 Build 625

      Is it possible that you reproduce the problem in a Windows (7 or later) environment?

    • TMK's avatar
      TMK
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      7 years ago

      Thank you for your update. In order to reproduce the issue you have to select "Create simulation model: VHDL" in the generation window. Could you please try that as well?

    • TMK's avatar
      TMK
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      7 years ago

      As I'm able to reproduce the issue with the IP core provided by you and a new test system similar to yours, could you please try it again?

  • TMK's avatar
    TMK
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    7 years ago

    Btw, could you check with support why I permanently fail to log in to the Intel forum and it only works when I reset my password before?