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TMS320C6748: LCDK not working

Prerak Sheth
Prodigy 40 points
Part Number: TMS320C6748
Other Parts Discussed in Thread: OMAP-L138

Friends - I have just purchased this development kit and trying to follow the instructions

On one laptop, the USB can be recognized but nothing happens when applied power after that (the quick start guide states that kit will communicate over serial port at 115200 baud)

On another laptop, the port is simply not recognized - it already has drivers.

Thanks

  • 0
    TI__Guru**** 161600 points
    Hi,

    Have you flashed anything on the board? Do you see the LED indicators blinking/glowing?

    Did you configure your terminal properly (as described here: processors.wiki.ti.com/.../C6748_Development_Kit_(LCDK)

    Best Regards,
    Yordan
  • 0
    TI__Guru** 114410 points
    Prerak,

    We have similar issues reported with a latest builds of LCDK which is caused because of a test escape at board manufacturer. It appears to be caused due to incorrect programming of flash on these boards. Hence we have added a sticky note:
    e2e.ti.com/.../614364

    We have sent an alert to the board manufacturer and working to resolve this issue. In the meantime, you can restore the board using the instructions provided on the wiki.

    Easiest way to know that the board is working when the flash image is not present is to configure the SW1 switch to UART boot using switch settings shown here:
    processors.wiki.ti.com/.../C6748_Development_Kit_(LCDK)

    When you power on you will see BOOTME on the serial console on your host.

    Regards,
    Rahul
  • 0 in reply to Rahul Prabhu
    Prodigy 40 points
    Thanks for the reply. Now I have a bigger problem - no PC/Laptop is recognizing the serial port when I connect the USB to the computer. Any suggestions?
  • 0 in reply to Prerak Sheth
    Prodigy 40 points
    For more diagnosis, All 4 green LEDs near the U16 are glowing, and the one green LED near power socket is also glowing. This is the status whether I connect power or not - when the USB is connected...
  • 0 in reply to Prerak Sheth
    TI__Guru** 114410 points
    Prerak,

    I am fairly certain that you are connecting to USB OTG port and not to the UART port.Make sure that you care connecting to the UART2USB port and not to the USB OTG port. This is a common error so I would like to eliminate this issue. Do you have FTDI driver 13.11.35.00 installed ?

    Regards,
    Rahul
  • 0 in reply to Rahul Prabhu
    Prodigy 40 points

    That's so very stupid of me! Yes. The port is now visible. I will try out the other things suggested previously and see if I can get started and the if serial port does show up the messages finally

    Thanks a lot

  • 0 in reply to Prerak Sheth
    Prodigy 70 points
    Dear All

    thank you very much for these helpful posts. I encountered similar issue after I got the board last week. I will follow these instructions to try again. The package comes with installation guild which suggests using CCS5x, but V5 does not support Win10 OS.
    I want to try the latest CCSV7, but not sure if it requires additional purchase of user license?
    also I am not sure if LCDK has an onboard debugger for some simple stepping and debugging.
    Do I absolutely need an emulator for code development?

    your advise and suggestions are much appreciated.

    Many thanks,
  • 0 in reply to digicom
    TI__Guru** 114410 points
    digicom,

    The LCDK platform was created in 2013 so the kit comes with software which was current at the time of creation of the kit.

    We have subsequently provided updated software that support CCSv7 with Processor SDK RTOS release. Both software is available to download for free. LCDK doesn`t have an onboard emulator so you need to external emulator to develop code on C6748 platform.

    You can choose to develop applications and then load them using SD card or the NAND flash but you can`t single step through code without an external emulator.

    Regards,
    Rahul
  • 0 in reply to Rahul Prabhu
    Prodigy 70 points
    Hi Rahul,

    thanks a lot for the answer. I appreciated it.

    best regards,

    bin
  • 0 in reply to Rahul Prabhu
    Prodigy 70 points

    Dear All,

    I followed the instruction in the article to erase and reflash the NAND. But still having trouble getting the board demo to work.
    I did the following steps:
    (1) set boot mode to USB2, by setting sw1-3 = OFF-ON-OFF-ON.
    (2) connect usb2 and power, LED is on, and com3 is detected by PC, in tera term BOOTME is displayed on screen.
    (3) download and extract C6748-LCDK-Demo.zip , there are three files readme.txt, facedetect_lcdk.bin, sfh_OMAP-L138.exe
    (4) run sfh_OMAP-L138.exe -targettype C6748_LCDK -flashtype NAND -p COM3 -erase, erase successful
    (5) run sfh_OMAP-L138.exe -targettype C6748_LCDK -flashtype NAND -p COM3 -flash_noubl facedetect_lcdk.bin, write flash successful
    (6) power off, switch back to NAND boot mode by setting sw1-3 = OFF-ON-ON-ON.
    (7) power on

    the board is still not responding.

    I don't know if I missed something in the above steps.

    Thank you very much for your time and help.

    best regards,

    bin

  • 0 in reply to digicom
    TI__Guru** 114410 points
    Bin,

    The steps you described here are accurate and should have fixed the issue. If did not fix the issue, then I would recommend that the you get in touch with the board manufacturer to see if this is a board level issue that was overlooked after the assembly.

    Are you able to connect an emulator and load and run the code on the DSP. The facedetect demo sets uses DDR, VPIF , VGA connector, UART so it could be any of those components but if you are able to load and code and check those interfaces then it may be a timing related issue due to some component that the board manufacturer replaced on this board.

    Regards,
    Rahul
  • 0 in reply to Rahul Prabhu
    Prodigy 70 points

    Thanks a lot, Rahul, for these pointers.  I will look into those.

    best regards,

    bin