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DLP4710EVM-LC: USB connection fails

Derlin Chow
Intellectual 525 points
Part Number: DLP4710EVM-LC

Hi TI,

We have one DLP 4710 EVM LC that can not be connected via USB. Windows GUI can not detect it and Cypress Configuration Utility can not detect it neither.

It can be power on, projection on, but the projection can not be turned off. 

LED 66 and 67 are solid on when power on.

Is it the Cypress chip problem?

Can I use JTAG to check communicate with MSP430?

Thanks!

Derlin Chow

. 

 

  • 0
    TI__Mastermind 23070 points

    Hello Derlin,

    Was this EVM working before?  If yes, did make any changes and what?

    This information will be helpful identifying  problem.

    regards,

    Vivek

  • 0 in reply to Vivek Thakur
    Intellectual 525 points

    Hi Vivek,

    The projector was good but just has the issue.

    Thanks!

    Derlin

      

  • 0 in reply to Derlin Chow
    TI__Mastermind 28005 points

    Derlin,

    It sounds like you received your system and it boots as is, with only the USB connection not working. Is that correct?

    If so here are some recommendations from me:

    > Check your operating system. Are you on Windows 10? Try a separate machine with Windows 7 if possible. There could be a cypress driver compatibility issue present.

    > Check your USB cable, just in case it's a hardware issue.

    > What version of GUI software are you using? Ensure you are on the latest Light Control GUI. Please keep in mind that there is a legacy GUI which is only compatible with our display EVMs. You should be using this one:http://www.ti.com/tool/DLPDLC-GUI

    > On the GUI, does the front page status data read properly? If so, what embedded firmware versions are you detecting?

    I hope this helps.

    Regards,

    Philippe Dollo

  • 0 in reply to Philippe Dollo
    Intellectual 525 points

    Hi Philippe,

    The projector was ok either with Windows 10 GUI or Ubuntu cypress C++ SDK.

    Before it stopped working, we had used it for three months. USB cable is good (we have several 4710 EVM LC). GUI and firmware is up to date.

    Thanks!

    Derlin

  • 0 in reply to Derlin Chow
    TI__Expert 4610 points

    Hi Derlin,

    After looking at above conversation, your USB was working earlier but not it is not. You may also know that cypress chip receive the USB command and send the I2C command to DLPC. 

    Now, I can suspect few things :

    1. Cypress chip itself not working, there may be any shorting in chip. Can you probe and check if you see any pin shorted to ground or with other pin. Also can you probe the MCU_SW_ONOFF signal status on cypress chip. Also can you probe CY_P3P3V.

    2. MSP430 software might be corrupted and not sending the MCU_ACK to Cypress. In that case i would suggest to update the MSP430 firmware u available on http://www.ti.com/tool/DLP4710EVM-LC using JTAG or MSP430 FET programmer. 

    3. commands are not working. DLPC is not freeing the I2C line. In that case you can use the I2C hardware tool for sending the commands over I2C. One of the tool you cna use is Devasys.

    you can try above debug suggestion and let me know if it solves the issue. Based on your input we will see how we can move forward.

    Thanks,

    Navneet