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DLP3010: I2C resizing not working with all HDMI source

NOVA17
Prodigy 240 points
Part Number: DLP3010

Hi there,

I'm currently able to control the display size of the projector by sending i2c commands.

Everything works well while using my Lenovo laptop as a source but when I'm connecting my MacBook Pro or a BeagleBone, it's not working all the time.

Do you have any idea what's going wrong?

Is it a HDMI driver issue or do I have to send an i2c command to fix it?

Kind regards,

  • 0
    TI__Mastermind 28005 points
    Hello NOVA,

    Can you describe in more detail what you are experiencing? It sounds like you are having some sort of video issue. In this case, it would potentially be related to the video drivers you are using. Please let me know.

    Best Regards,

    Philippe Dollo
  • 0 in reply to Philippe Dollo
    Prodigy 240 points

    Hi Philippe,

    Thanks for replying.

    Here is what I'm doing:

    Case 1

    I control the projector with an Arduino through i2c and I connect my Lenovo Laptop to the HDMI input.

             Arduino <--- i2c ---> Projector <--- HDMI ---> Lenovo Laptop

    I send the i2c commands to Write Display Size (register 0x12) and it works really well every time I set a new size (I've tried it 20 times with success). 

    Case 2

    I control the projector with an Arduino through i2c and I connect my MacBook Pro to the HDMI input.

             Arduino <--- i2c ---> Projector <--- HDMI ---> MacBook Pro

    I send the i2c commands to Write Display Size (register 0x12) but sometimes it works and sometimes it doesn't. It is inconsistent.

    I look forward to hearing from you soon.

    Kind Regards,

  • 0 in reply to NOVA17
    TI__Mastermind 28005 points

    Hello Nova,

    The most likely problem is in the Macbook Pro's driver. To resolve this, I would check the timing specification of the Macbook Pro's video driver (if available) and compare against the spec given for the DLP3010 chipset. This spec can be found in section 6.12 of the controller datasheet: http://www.ti.com/lit/ds/dlps038c/dlps038c.pdf

    You will likely need to download new video drivers for your Macbook Pro device to fix this problem.

    Best Regards,

    Philippe Dollo