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BQ40Z50EVM-561: Difficulty getting the Battery Management Studio to recognize the device correctly

Will Lyons
Prodigy 70 points
Part Number: BQ40Z50EVM-561
Other Parts Discussed in Thread: BQ40Z50-R2, , BQSTUDIO, BQ40Z50, EV2400, BQ40Z50-R1

My project recently purchased a BQ40Z50EVM-561 kit and an EV2400 module interface. I'm having difficulty getting the Battery Management Studio to recognize the device correctly. Currently the Target Selection Wizard screen shows the Auto Detected Device as 4500_2_08 which does not appear in its list of supported targets. I can find no documentation on whether the kit itself ships with a BQ40Z50, a BQ40Z50-R1, or a BQ40Z50-R2 which are the three parts listed on the kit's product description page. I believe I am running the latest version of bqStudio as I downloaded it only a few days ago and the release date listed on its webpage shows July of 2017. Please advise as to how I should proceed to get the evaluation kit operating correctly under PC control.

  • 0
    TI__Mastermind 25955 points

    Hi Will,

    How are you powering the bq40z50 EVM? The EVM requires external power - the device defaults are set to a 3S configuration.

    1. For bringup, create a 'battery simulator' using 3 resistors, a length of wire, and a power supply. Please use 3 1 KOhm resistors to connect 1N to 1P, 1P to 2P, 2P to 3P and a length of wire to connected 3P to 4P. Please connect your power supply negative to the 1N side of the bottom resistor, and the positive supply to the 3P top end of your resistive ladder.

    2. You may also connect a load to PACK+ and PACK-.

    3. Ensure the SMBUS wires are connected between your EVM and the EV2400 and the usb cable is connected to your PC and EV2400

    4. Open bqStudio and select your gauge. This is just to confirm that the USB device is seen.

    5. Energize your battery simulator by turning on your power supply and bringing the voltage to 10.8 V (3.6 V per cell in this configuration)

    6. Now the magic happens: To wakeup the device, press the Wake pushbutton switch. This temporarily connects Bat+ to Pack+.

    7. The device should come to life in bqStudio. If not, click on file > Restart bqStudio. It should autodetect upon restart.

    For more details on how to configure and bring up your device, please refer to the EVM User's Manual found at: http://www.ti.com/lit/sluuav7

    There is a new version of the R2 firmware coming out in the next few days.

    Please let me know if you run into any other issues!

    Sincerely,
    Bryan Kahler

  • 0 in reply to Bryan Kahler
    Prodigy 70 points

    My trouble is not in the hardware setup but with the software.  bqStudio does not appear to recognize the eval kit (or at least not have an option to support it).  What is the correct device to select if I want to manually force bqStudio to talk to the BQ40Z50EVM-561?  Should I be using a different software program to talk to the kit?

  • 0 in reply to Will Lyons
    TI__Expert 6575 points

    Typically the EVM ships with bq40z50-R1.

    The EVM does need to be powered to be detected by the bqStudio. There is not much point in using the bqStudio if there is nothing for it to talk to.

    If the EVM is not powered or not connected, you will get the following screen:

    The Auto detected device will be "None".

    However if the EVM is powered it will automatically detect the device.

    Are you getting a different "Auto detected Device" when you launch bqStudio?

    Can you post a screen shot if this is the case.

    Regards,

    Swami

  • 0 in reply to Swaminathan Ramanathan75031
    Prodigy 70 points

    I get a device type of "4500_2_08" detected if I press the Wake button on the EVM (otherwise I get "None").  However, all the buttons are greyed out except "Cancel".  If I select "All Devices" from the list I can hit Next, but then I get a long list of targets, none of which match "4500_2_08".  Closest matches are "4500_0_12-bq40z50.bqz" and "4500_1_06-bq40z50R1.bqz", hence my original question of what is on the board and which (if any) of the targets I should select?

    .

  • 0 in reply to Will Lyons
    TI__Mastermind 25955 points
    Hi Will,

    To answer your original question of: " Please advise as to how I should proceed to get the evaluation kit operating correctly under PC control."

    1. Make sure bqStudio is closed.
    2. Connect your EV2400/EV2300 to your computer via USB and to your board via SMBus.
    3. Please power your board, then hit the wake button.
    4. Now open bqStudio. It should auto detect your gauge and its firmware and open the proper version of the firmware based upon the firmware installed on the device.
    5. To determine the version of the firmware on the device, Check Firmware Version in the Data Memory tab.

    If you would like to change the firmware on the device, please open a new thread and we will resolve that issue as well.

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Prodigy 70 points
    As I explained in both of my previous posts above, I verified that the EVM is connected to the EV2400 via the PORT 1/SMB port using the provided cable. The EVM has 3 1K resistors across the 1,2,3 ports and a jumper across the 4th port. I am supplying 10.8V from a benchtop supply across the resistor bank (1N to 3P). All the LEDs on the EV2400 are lit green for USB, COMM and VOLTEN. I pushed the wake button prior to starting bqstudio. The device does auto detect but not as anything the software seems to know what to do with, see my 2nd post and screenshots above.
  • 0 in reply to Will Lyons
    TI__Mastermind 25955 points
    Hi Will,

    Please download the most recent version of bqstudio. It is called BQSTUDIOTEST on the website found here: www.ti.com/.../BQSTUDIO

    It has the most up to date firmware and should fix your auto detect failure.

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Prodigy 70 points
    This did the trick. According to the software the chip is a bq40z50R2 so that would maybe explain why the older version didn't recognize it. A little frustrating, but got it solved in the end. :)