USB Detection of K22DN512VLH5 Device to PC

[analogicstechin]

Hello Everyone ,

          We are using MK22DN512VLH5  50 MHz  in our custom board , Used USB Device CDC Vcom example from SDK_2.3.1_MK22DN512xxx5.zip to build the application and Boot loader , The issue i am facing is the detection of custom board with Windows PCs.

                                 It is Detected correctly as Virtual Com Port in few PCs using the INF file provided with the SDK , It is detecting in Windows 10-64 bit and 32 bit ,In windows 7-32 bit Pcs we are facing problem , it is detecting properly in few and in other PCs it is showing as USB Device Unkown . In Windows Xp also we are facing the same issue .

Doubting our application and boot loader  we have tried flashing the custom board with the direct example provided in the SDK and it is the same . it shows Unknown USB device .

                     what could be the potential reason for this inconsistency of USB detection on various windows platforms .

Could there be any issue with the hardware ?

Any suggestions regarding this issue will be of great help .

I have attached the Inf file we used with this post , anticipation a solution .

Thanks and Regards .

[analogicstechin]

Hui_Ma‌ 

Thanks for the response ,

We are facing the issue in windows 7 32 bit PC , yes the driver installation issue is what we are facing with .

We are using the same inf file yet it is detecting as Unknown USB device instead of VCom port like it did in few PCs we have .

Got struck with this step , the application and boot loader are ready and when we were planning to go for production this is what stopping us .

Thanks and regards

Analogics | Home 

[Hui_Ma]

Hi,

Do you have TWR-K21D50M board on hand?

If yes, could you do a test if TWR-K21D50M board could be recognized by Win7 32bit PC and WinXP PC?

How many customer boards tested with Win7 32bit PC?

best regards,

Mike

[analogicstechin]

Hello Hui_Ma‌

                              No we do not have TWR-K21D50M  with us but are having FRDM-K22F board with us but came to know that both these are different so we took k21 50Mhz SDK and developed our application .

We have tested with around 8 PCs which run Windows 7 32 in our R&D and it is working fine on 5 of them and we are facing problem in 3 pcs . In windows XP there is  not even a single PCs the  board gets detected .

will look if we could get TWRK21 board , between FRDM K22 detection is fine in all of them .

Could we suspect the hardware ? but it is working fine in few .

Could we suspect the Application ? but the raw SDK is also showing same result .

What could be potential wrong that is happening here is unknown to us .

Thanks for the response .

Thanks and regards.

[Hui_Ma]

Hi,

Sorry for the later reply.

I discuss customer issue with local application team, we think it need to focus on hardware design.

If possible, could you do a USB signal quality test with the boards.

It also need to check the USB circuit design, please refer TWR-K21D50M board schematics about USB circuit:

best regards,

Mike

[Hui_Ma]

Hi,

There are some threads about USB CDC issue with Win8/Win10 OS.

Please check below threads for the detailed info:

Kinetis USB CDC driver supported on Windows8, Windows10 

I also attached TWR-K20D50M board USB CDC device driver for your test.

Have a great day,
Mike

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[analogicstechin]

Hello Hui_Ma,

                Thanks for the response,   With Windows 10 we are not facing issues , we have 3 windows 10 PCs and it is working fine with them , we are facing issues with windows 7 and  windows XP PCs , Out of 7 windows 7 PCs we have, it is detected in 4 of them and in other 3 it is not detecting ,also tried using the inf you have sent but the out come is same as previous , detecting under USB section as Unknown Device .

Thanks and Regards.

[Hui_Ma]

Hi,

I checked the previous [usb cdc driver] inf file USB VID & PID is different with MCUXpresso SDK provided <fsl_ucwxp.inf> file.

So, I change the <Freescale_CDC_Driver_Kinetis.inf> file's USB VID&PID.

Please try again to check if this cdc driver works at Win7 & WinXP OS PC.

best regards,

Mike

[analogicstechin]

Hi Mike ,

        Thanks for making those changes in the INF file and sending it but that did  not resolve the problem .

Thanks and Regards.

[Hui_Ma]

Hi,

Sorry for the delay reply.

You mentioned before there with 7 Win7 PC with 3 PC couldn't detect the Kinetis K22_50MHz USB CDC device.

What's those Win7 OS version? 64bit or 32bit?

If those 3 Win7 PC could enumerate the USB CDC device?

If yes, there exist the issue at USB driver installation.

I compare the two USB CDC driver inf file line by line, there should be the same driver file.

The inf file major contents are totally same.

best regards,

Mike

[analogicstechin]

Hui_Ma‌

  Thanks Mike,

          Sure will check and revert back about it .