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JLee25's avatar
JLee25
Icon for Contributor rankContributor
6 years ago

VIP Suit Switch II Ready Signal

Hello, I am working on a simple project that with CVI/ PTG -> Switch -> CVO -> HDMI at 1080p. Sometimes the CVO is not outputting any signal from PTG. From Signal Tap, I noticed for CVO or S...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi Johnson,

If I understand it correctly, when you are referring to the ready signal of Switch II is not asserted, I believe you are referring to the din_<>_ready output ports.

If yes, for your information, K is correct. After power up, you will need to write to the Control register to start the Switch II.

As for the CVO, if you enable the control ports, then you will need to write to its register to start it as well.

Please let me know if there is any concern. Thank you.

Best regards,

Chee Pin

  • JLee25's avatar
    JLee25
    Icon for Contributor rankContributor
    6 years ago

    Hi K and Chee Pin,

    Thank you for the reply.

    I think I am looking for why the Switch II IP is not responding to new configuration.

    Below are signals from my project.

    din_0 is PTG

    din_1 is CVI

    dout_0 is frame buffer and will output to CVO.

    After download and before any config, the ready signal raised.

    CVI is Go but without any valid input data.

    And PTG is "Go" at 1080p RGB 10 bit.

    After programming registers to .Dout_0 from din_0 and both inputs as consume mode.

    After config,

    Then I download the nios ii again to do new configuration.

    The Status value of Switch kept at 1.

    I tried using 2 different ways to update the new values but the IP is not responding.