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Altera_Forum's avatar
Altera_Forum
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16 years ago

UART core

hello,

I have used the nios 2 uart core to send info from the nios to the computer (with rs-232). I have used the Hterm software to see the receive info from the rs232 and no matter what I have sent to the computer, the Hterm presented the values 00 or 0f.

what could be the problem?

thank's!

6 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    You should connect an oscilloscope (or Signaltap probes) and look at the serial signal, to check if it is as expected.

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    I have a question for you: How you connected the PC to the Board? I have Cyclone III starter board, and the HSMC is occupied, the only "wires" available are the BoundaryScan or JTAG pins.

    How I can connect the PC to the Nios UART?

    Thanks.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    You can't... there isn't any rs232 connection on the kit. You would need to get some signals from the HSMC connector and use a LVTTL to RS232 transceiver.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    for quick cheque use microsoft "hyperterminal " utility where you can edit boud rate start/ stop bit etc and make sure disable hardware control tab to none in hyperterminal control setting window.