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MMWCAS-DSP-EVM: Problems with communicating to the board via ethernet and serial port

Khalil Elbaggari
Prodigy 30 points
Part Number: MMWCAS-DSP-EVM
Other Parts Discussed in Thread: MMWCAS-RF-EVM, TDA2

Hi,

We purchased the MMWCAS-DSP-EVM and MMWCAS-RF-EVM and following the user guide, we were unable to get either the ethernet and serial communication working with the board. When connected to an ethernet dongle, router, and directly to a computer, the board didn't respond to pings at the default address and none of the lights on the ethernet connector lit up. Powering the board with a 12V supply didn't change the behavior though it seems like each section is receiving power. We were  unable to talk to the board through either of the two serial ports that appeared when connecting the DSP board to a computer via the mini-USB connector. Reflashing the micro SD card with the most recent firmware didn't change things so we're suspecting the processor isn't booting up. The board looks to be in decent physical condition.

We tried these things while waiting for a reply on our case started at the beginning of the week. Unless there's something we're missing, we'll return the DSP board for a replacement next week.

Thanks

  • 0
    TI__Guru*** 141304 points

    Hi

    Our cascade expert will review this information early thus week.

    Thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 30 points

    Cesar said:

    Our cascade expert will review this information early thus week.



    Hi,

    Just following up. Do you have any updates?

    Thanks

  • 0 in reply to Khalil Elbaggari
    TI__Genius 17820 points

    Hi Khalil, 

    No Ethernet link or activity light will be illuminated until 12V power is applied to the board. 

    The FTDI UART-USB bridge is powered from the USB host provided 5V line. The 2 virtual com ports should enumerate prior to 12V power being provided. If they do not, the FTDI bridge may be damaged. 

    Did you already follow all of the initial connection procedure outlined in the mmWave Studio Cascade User Guide? See section 5 "Booting the EVM" (http://software-dl.ti.com/ra-processors/esd/MMWAVE-STUDIO/latest/exports/mmwave_studio_cascade_user_guide.pdf). 

    • Verify your UART settings are setup as shown in the mmWave Studio cascade user guide. 
    • Verify that you are selecting the lower enumerated serial port 
    • Verify your FTDI virtual com-port drivers are up to date
      • In the case of Windows systems with many virtual com port enumerations, I have sometimes found it necessary to manually remove old enumerations periodically for new connections to function properly. 
    • Verify that the TDA2 bootmode selector switches (S4) are in the correct, default, position for TDA2 SD-card boot
    • Verify that you are using at least a 12V, 3A compatible AC/DC converter or bench supply
    • Can you attempt to format and use another SD card for boot?

    If you are following the procedures outlined in the user guide and are unable to even see the UART boot log and get to the login prompt, then the board may be damaged in some way. In that case, I suggest following the TI product return process and getting an exchange for this EVM. https://www.ti.com/productreturns/docs/createReturn.tsp

    Please let me know if any of that helps. 

    Thank you,

    -Randy

  • 0 in reply to Randy Rosales
    Prodigy 30 points

    Hi,

     

    We followed the guide again and your steps carefully with 12V supplied to the board to see if there was any response but didn't see anything (using PuTTY, pyserial, and the Arduino serial monitor). The S4 switches were in the right position and reflipping them in case there was poor contact didn’t change anything. The serial ports do appear but there wasn't any activity on them. The ethernet connection still didn't show any activity.

     

    We’ll create a return request for the EVM and thanks for the help!