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Altera_Forum's avatar
Altera_Forum
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10 years ago

uart ip: can't get rx data

I generated an uart core from qsys and made a simulation with modelsim.

I instantiated two uart (one as transmitter and one as receiver); I connected the "uart_0_external_connection_txd" pin of the transmitter to the "uart_0_external_connection_rxd" pin of the receiver.

The uart transmitter seems work properly but I can't get the signal "uart_0_s1_dataavailable=1" from the receiver uart and the rxdata register is always 0.

Do you have any suggestion?

Thank for your help

2 Replies

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

    Hi Galfonz,

    thank you for your reply.

    I'm using the uart core for simulation purpose in modelsim. I don't think I can put a pull up resistor for simulation. How can I do that?