USB CDC device not being recognised by windows. (STM32WB5M, Bluetooth low energy)

[Javier1]

Context:

I have succesfully implemented a CDC device in a stm32f205 board 6 months ago.

Now im trying to implement the exact same thing in my STM32WB5M discovery board.

BLE is already activated and working P2P custom server

• Using CUBEMX 6.3.0
• FW package STM32Cube_FW_WB_V1.13.0

 

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 Problem:

Windows doesnt recognise the USB device.

 

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How did i got here:

I enabled the USB device mode in cubeMX

 

I enabled the middleware

 

I autogenerate the code....

Inside usb_cdc_if.c i add this code

 

everything compiles and runs but windows doesnt recognice the USB device

Find attached my cubeMX file.

The Windows doesnt recognice error appears when the usb is enabled (i dont know if this means anything )The usb handle struc doesnt show any errors after init

[Javier1]

maybe i have clock issues?

[Javier1]

setting my clock to HSE+PLL didnt work either

[Javier1]

I increased Minimum Heap size to 0x2000 didnt work either.

As sugested by @Radek RIPA​ https://community.st.com/s/question/0D50X00009XkeGNSAZ/stm32-usb-cdc-device-descriptor-request-failed

[Javier1]

I found the issue: incompatiblityin the autogenerated CUBEMX code USB+BLE=no bueno

if i comment out MX_APPE_Init() my usb CDC device is regoniced.

It turns out the BLE thing MX_APPE_Process() corrupts the USB CDC device.

If MX_APPE_Process() gets commented out, CDC device works as expected

TODO:

i need to figure out why USB and BLE are not happy working together......and fix it

[Javier1]

MX_APPE_Process() is accessing the "Sequencer" maybe thats the problem

The BLE stacked sequencer cannot work with the USB device?

[Amel NASRI]

Hi @Javier Muñoz​ ,

At this level, I suggest to involve our experts for STM32CubeMX @Khouloud OTHMAN​  & STM32WB @Remi QUINTIN​  to help you invistigating the issue.

Don't hesitate to share your findings meanwhile.

Thanks.

-Amel

[Javier1]

Thanks @Amel NASRI​ , i would normally fight this untill i find the problem but my resources are limited.

My design allowed me to replace USB for UART communications.

I dont think im comming back to face this USB+BLE issue anytime soon.

[jsoda.1]

Well, I was finding solution for my USB flash stick project and found this post.... AMAZING!!

[Javier1]