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AM1808 no RGB(LCD) out

Yucheng
Prodigy 170 points

I am using DDR2, clock run 132MHz.

no RGB output (VPIF LCD), but mDDR 150MHz can work.

how to fix VPIF clock match DDR2?

  • 0
    TI__Mastermind 27585 points

    Can you clarify if you are using the LCDC peripheral or the VPIF peripheral?

    If you are modifying the PLL's you need to make sure your pixel clock is not changing either.

    Jeff

  • 0 in reply to jc-ti
    Prodigy 170 points

    I use the VPIF peripheral output RGB data to 320*240 LCD on the EVM (use mDDR)

    but can not run my board (use DDR2).

    how to modifying the PLL's  and make sure PCLK? the file path ?

    THANKS!

     

  • 0 in reply to Yucheng
    TI__Mastermind 27585 points

    You should use the LCD controller if you are outputting RGB data to and LCD.

    VPIF is for connecting to DACs, so you should not be using that.

    Have you checked to make sure the DDR is working on your board? Check the memory window at 0xC0000000. It might be that your controller settings are incorrect so your frame buffer is corrupted.

    Jeff