BQ76952EVM: BQ76952EVM Not detecting on PC

Hello Naveed,

I found this previous thread that may help: EVM will not connect on Windows 11.

Best Regards,
Alexis

Hello Alexis,

                    Thanks for the prompt reply. I have tried to look for the services mentioned in the thread, but there is no LogitechLamparray service running in the background or otherwise which I could disable however there is something called LGupdaterhub,

but now the board doesn't seem to work on Windows 10 as well, since I tried hooking it up to my colleagues Laptop and it doesn't work. All three LED's still light up but when I open BQ studio it doesn't recognize EV2400 and hence doesn't allow the I2C communication as well.

Regards

Naveed S.

Hello Naveed,

Do you mind sharing an entire screenshot of what your bqStudio is showing?

Best Regards,
Alexis

Hello Alexis, 

                    Please find both the screeshot of the BQ Studio when the EVM board is connected as well as the setup.

/resized-image/__size/1280x720/__key/communityserver-discussions-components-files/196/2046.Setup.jpg

/resized-image/__size/1920x1080/__key/communityserver-discussions-components-files/196/3056.BQ-studio.png

Regards

Naveed S.

Hello Naveed,

Do you have the shunts connected at J15 and J18 as well when you’re trying to use the EV2400 to communicate with the board to your computer/laptop? It's weird for the USB adapter to not work if it is connected as shown in Figure 2-1. EVM Connection for Basic Operation from the EVM User Guide.

Also, I noticed from your image, that it says 'No free adapters are available for use on this system' on the bottom left corner. Please try following this post to see if that also helps. 

Best Regards,
Alexis

Hi Alexis,

No, I don’t have any shunt connected at J15 and J18 while using the EV2400 to communicate with my laptop. The setup is exactly as shown in Figure 2-1 of the EVM user guide.

I’ve also checked the 3.3V and 5V voltage rails as mentioned in the thread shared by you and can measure them accurately when the board is plugged into the laptop via USB. Additionally, I can see an HID device appearing in Device Manager when plugged in and disappearing when unplugged.

Despite this, I’m still struggling to get it working, even though it should be straightforward.

Regards

Naveed S.

Hello Naveed,

Naveed Shiliwala said:

No, I don’t have any shunt connected at J15 and J18 while using the EV2400 to communicate with my laptop

If you have your setup connected similar to Figure 2-1. EVM Connection for Basic Operation from the user guide, you do not need to use the EV2400 and have the shunts connected at J15 and J18.

If you want to use the EV2400, you need those shunts connected to the pull-up resistors on the board. Figure 5-10. Schematic Diagram Pin Configuration shows the connectors to the external I2C connection back to the IC. Could you try using the EV2400 with the shunts connected and without the USB back to the laptop? The EV2400 should connect to the laptop instead.

Best Regards,
Alexis

Hello Alexis,

I believe there may have been some confusion, or perhaps I wasn’t clear in my earlier explanation. What I meant by the statement "J15 and J18 are not connected while using the EV2400" is that both of the shunts are disconnected when the BQ76952EVM is connected through the on-board USB, rather than using the external EV2400.

That said, I did also try connecting the BQ76952EVM through the external EV2400, with both shunts (J15 and J18) connected, while disconnecting them from J16 and J19, but unfortunately, it still didn’t work. It seems that neither the EV2400 nor the interface adapter on the BQ76952 is being recognized. 

Hello Naveed,

Thanks for clarifying. When you are using the external EV2400, is REG1 reading 3.3V? If not, then that would explain why the external EV2400 would not work.  

Also, do you mind downloading the latest bqStudio version (BQSTUDIO Application software & framework | TI.com) and checking if your EV2400 on the latest firmware v0.32 (EV2400 Interface adapter | TI.com)? 

Best Regards,
Alexis

Hello Alexis,

                    Yes when I connect the External EV2400 to BQ76952EVM REG1 does read 3.3V. However the EV2400 still isn't recognize by BQ studio. I have downloaded the latest BQ studio but the results are the same. Neither the BQ76952EVM is detected nor the external EV2400. 

I also tried to update the firmware on the EV2400 but to no avail. Again because EV2400 is not detected. 

Regards

Naveed S. 

Hello Naveed,

I'm sorry to hear that it's still not being detected. 

I found these previous threads that may help:
1) EV2400: Device not recognized on Windows 11.
2) EV2400 not recognized

Can you see if those work/help at all?

Best Regards,
Alexis

Hello Alexis,

Hi Alexis,

Apologies for the delayed response—I was on leave. Coming back to our discussion, I tried both suggested solutions from the threads, but unfortunately, neither worked.

Initially, I couldn't update the EV2400 firmware on Windows 11. I then connected both the EV2400 and BQ76952EVM to a Windows 10 PC, where I successfully updated the firmware. However, even after the update, both EV2400 and BQ76952EVM were no longer detected in BQ Studio or Windows 10/11. Additionally, both the boards now no longer appears when checking for a firmware update.

Could you advise on the next steps?

  Regards

Naveed S.

Hello Naveed,

Check if the EV2400 driver is showing up in Device Manager -> Ports COM.
If not, likely the drivers are not properly installed which they should be automatically install when you download the executable file from ti.com 

https://www.ti.com/tool/download/SLUC706

Hello Jose,                 

There don’t appear to be any additional devices listed under the COM Port, but I do see an extra entry under HID. However, it’s only identified as "HID-Compliant" rather than "EV2400." I attempted to use the utility mentioned earlier, but it only supports Windows 10 and that too just for the first time as once the EV2400 is updated, it stops being detected in the terminal, as I previously mentioned in my responses to Alexis.

I’m close to finalizing the schematic for my project, but I still can’t confirm whether it will work since I haven’t been able to test it on the EVM. I was just about to test the EVM with an actual battery cell before it stopped working. Any help in getting it up and running again would be greatly appreciated, as I don’t want to proceed with manufacturing without verifying that the design functions correctly.

Regards

Naveed S.

Hello Naveed,

Something like the below must be detected.




What does your setup look like? Show a picture of your set up.
Are you using on board EV2400 or external EV2400?