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PHJ's avatar
PHJ
Icon for Occasional Contributor rankOccasional Contributor
7 years ago
Solved

Arria 10 SoC DevKit: Can I drive DB-9 RS-232 port from HPS UART0 ?

The user guide indicates that this is available after FPGA configuration. What needs to be configured for this to work ? ​Does the GSRD support this ?
  • PHJ's avatar
    PHJ
    7 years ago

    ​Hi,

    I now have the HPS UART0 routed through the FPGA OK to the DB9 RS-232 port.

    The UART_RS232 soft IP is not required in the FPGA.

    My problem here was caused by the RS-232 PHY on the dev board operating in an auto-shutdown mode that meant that the external tx/rx loopback test I was attempting would never wake the PHY.

    Thanks,

    Paul

Ahmed_H_Intel1's avatar
Ahmed_H_Intel1
Icon for Frequent Contributor rankFrequent Contributor
7 years ago

Hi,

The RS-232 component on the board can be accessed by the "UART_RS-232 soft IP" in the platform designer (Qsys). So what you need is to connect the HPS IP to RS232 IP in the platform designer.

Also you still can use the NIOS II to control the RS232 and send the data to HPS in case of using the NIOS II as a master core.

Please refer to the UART core description in the following page:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_embedded_ip.pdf#page=106

Regards.