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DLPDLCR230NPEVM: Write Source Select (05h) Issue

Hidenori Katagiri
Prodigy 155 points
Part Number: DLPDLCR230NPEVM
Other Parts Discussed in Thread: DLPC3436

Hi TI,

I was ordered to design a new PCB using IT6801 as a parallel video source instead of RaspberryPi from my boss.
I got a TI board whose name is IT6801_FOR_TI_V13_07092014 to see if I can really use IT6801 as RGB666 video source before working on the PCB design.
I connected the TI board and DLPDLCR230NPEVM as below.
DLPDLCR230NPEVM displays the splash Image then the screen is shifted to the color bars without problem.
I accessed I2C through an external emulator module to control the DLPC3436 register.
I was able to change the color bars to other test patterns through I2C so I think the emulator is working correctly.
I was also able to select RGB666 by over writing XPR FPGA Video Format Select (6Dh) from 00h to 02h.
But I couldn't change the source of the video from Test pattern to External parallel video by Writing Source Select (05h). The return parameter stays at 00h.
Reading Short Status (D0h) shows return parameter 83h which means Communication error.
I would like to make it clear if I can use IT6801 by around Aug Mid.
It would be helpful if you could give some advice on this.
Best Regards, 
Hide
  • 0
    TI__Expert 7910 points

    Hi Hidenori,

    Welcome to the TI E2E forums and thanks for showing interest in the DLP technology.

    We are looking into this and will get back to you.

    Thank you!

    Regards,

    Lori Wang

  • 0 in reply to Lori Wang
    TI__Mastermind 28005 points

    Hide-san,

    Does the communication error persist if you read the register multiple times? Sometimes the error may fire a single time during boot.

    Furthermore, have you been able to get a video output from the Raspberry Pi (to ensure that you have the EVM configured properly)? There are Python sample scripts which configure the EVM for RGB666 operation available on the EVM tool folder. If you are having trouble with the ITE6801 it may be a good idea to start there and work your way towards the 6801.

    The DLPC3436 chipset (which is what the EVM uses) supports the ITE6801 so you should be able to get both modes of operation working with the right settings. 

    https://www.ti.com/tool/DLPDLCR230NPEVM 

    Regards,

    Philippe Dollo

  • 0 in reply to Philippe Dollo
    Prodigy 155 points

    Hi Philippe,

    Long time no see!

    Yes, the issue persists multiple times.

    As you suggested, I will check if the EVM is configured properly with RaspberryPi.
    The longest way round is the nearest way home.

    Having heard that the DLPC3436 supports the ITE6801 is good information and helpful.

    Thank you very much for your support.