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IWR1443: Connection issues over serial

Dexter Banham
Prodigy 70 points
Part Number: IWR1443

Hello everyone, 

I've been developing with the IWR1443 mmWave EVM for the past two weeks.

The software I've written was able to interface with the board over serial wonderfully, however, at the moment I am unable to connect to the board with my software or the mmWave Visualizer demo nor do the com ports for uart and data show up in the device manager.

We've had some of our technicians test the USB data pins with an oscilloscope while the board is connected to PC and it seems to no longer be talking to the PC at all. The board has been temperamental in regards to connecting with the PC since we've had it. I'm wondering if there is a technical fix or if we could get a replacement board from TI so that we can continue development? 

Thanks in advance, 

Dexter Banham

PS: We've tried different machines, cables, power supplies etc and nothing seems to help.  

[unlocked 1/19/18]>LE

  • 0
    TI__Mastermind 23725 points
    Hello Banham,

    Sorry to hear about the issues you are facing with the board. We have never seen this happen.

    Would you be able to probe the uart pins coming out of the device. I wonder if the uart to USB conversion device is the issue here.

    Thank you,
    Vaibhav
  • 0
    TI__Mastermind 30715 points

    Hello Dexter,

    Is the xds110 is showing up at all in your device manager ( with any name)?

    Is is possible that the firmware needs to be updated via the emupack?

  • 0 in reply to Vaibhav Mahimkar
    Prodigy 70 points
    We've had two of the Electrical Engineers probe the board with an oscilloscope, they did see an unexpected .7v drop over the data pins and ground on the USB, I'm not an electrical engineer so I've deferred to their expertise on this one. They tell me they can't see a UART to USB converter on the board or the schematic, is it build into the chip itself? At this point diagnosis of the issue is becoming more expensive than the board itself, which is not ideal.
  • 0 in reply to aozer
    Prodigy 70 points
    No, they aren't, I have tested on two machines that previously worked for the board and an additional machine that we set up to test the board again, none of them work, all the software and SDK is up to date, I'm certain this is a hardware issue.
  • 0 in reply to Dexter Banham
    TI__Mastermind 30715 points
    Hello Dexter,

    I am sorry to hear about the issues you are experiencing. The UART to USB is done through the TM4C1294 chip on the board. I will make some time to go to the lab today or tomorrow to probe the board and see if I experience the same 0.7V drop on a working board.

    Regards,

    Adrian
  • 0 in reply to Dexter Banham
    TI__Mastermind 30715 points
    Hello Dexter,

    So sorry for the significant delay. I probed the USB data pins and did not see any unexpected voltage drops. Have you tried to see if there is any serial data being sent through using Tera Term? When you have the device plugged in, are the COM ports showing up in your device manager?

    Regards,

    Adrian
  • 0 in reply to Dexter Banham
    TI__Mastermind 30715 points
    Hello Dexter,

    This thread will be closed due to inactivity. Please create a new thread if you have further questions.