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Toanatron's avatar
Toanatron
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4 months ago

Unable to transmit out of 16550 Compatible UART

Hi I am following the example of the 16550 Compatible UART in the Embedded peripherals IP User Guide and using the provided code I am not seeing any data in the loopback configuration. 

Software is Quartus Prime Lite 18.1

Any idea or suggestions is greatly appreciated. I'm not sure if I need to configure any registers?

 

general
Nios Cpu

5 Replies

  • Toanatron's avatar
    Toanatron
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    4 months ago

    Hi I was able to resolve my issue, the device name was not configured correctly for altera_16550_uart_open().

    • KianHinT_altera's avatar
      KianHinT_altera
      Icon for Frequent Contributor rankFrequent Contributor
      4 months ago

      Dear Customer,

      I'm glad that your issue is resolved. We will continue to monitor this post for the next 5 days. If there are no further inquiries during this period, I will step back and allow the community to assist with any future follow-up questions.

      Thank you for engaging with us!

      Best regards,
      Altera Technical Support

  • KianHinT_altera's avatar
    KianHinT_altera
    Icon for Frequent Contributor rankFrequent Contributor
    4 months ago

    Hi Toanatron​ ,

    Just to clarify, you're testing UART loopback between Uart 0 and Uart 1 as the example below

    Could you also let me know what FPGA platform you're usng?

    Thanks

    Regards

    Kian

    • KianHinT_altera's avatar
      KianHinT_altera
      Icon for Frequent Contributor rankFrequent Contributor
      4 months ago

      Forgot to mentioned, did you try running the c code  example which configures the uart ports and test the  UART0<->UART1

      Thanks

      Regards

      kian