USB not recognized by PC in FreeRTOS

[alyssa]

Hi, I want to get log using Type-c, and using freertos to run all the tasks.

setting:

MCU STM32L4A6VG

STM32CubeIDE 1.12.0

STM32CubeMX  6.8.0

tera term 4.106

when i insert Type-c, device manager return the unknown usb.

I try some methods:

1. put MX_USB_DEVICE_Init() before  MX_FREERTOS_Init() -->unknown usb error 43

2. put MX_USB_DEVICE_Init() in task -->unknown usb error 43

3. increase MINIMAL_STACK_SIZE to 1024  -->unknown usb error 43  (ref: https://community.st.com/t5/stm32cubemx-mcus/nucleo-h723zg-usb-cdc-communication-not-working-when-using/m-p/662907 )

4. change clock output  -->unknown usb error 43(ref: https://community.st.com/t5/stm32cubemx-mcus/unknown-usb-device-on-stm32f429zi-device/m-p/75508 )

5. i dont think i need interrupt in usb, but this ref make me confused (ref:https://community.st.com/t5/stm32-mcus-embedded-software/stm32g0b1-usb-device-not-recognized-in-windows-10/m-p/135939  )

It will be very helpful if any one tell me something. Thank you.

[TDK]

Can you include your code?

You definitely need USB interrupts enabled.

[alyssa]

Hi, 

thank you for you reply.

If you say the interrupt in NVIC settings. I have set it before (sorry make you confused), but still get unknown usb error 43.

i attach the main.c below. (for just testing usb, i disable the FreeRTOS)

but i dont think this is a FW problem.

because when i  use Full chip erase by STM32CubeProgrammer v2.13.0, the PC still tell me the unknown usb error 43.

i think without the FW, PC can recognize STM32 BOOTLOADER when insert usb.

 

[TDK]

> i think without the FW, PC can recognize STM32 BOOTLOADER when insert usb.

This is true. So perhaps there is a hardware error. Can you show your schematic?

Do you have a Nucleo or other known good ST board you can test this one?

[FBL]

Hi @alyssa 

 

Based on these attachments, there might be missing or incorrect device descriptors in your configuration. You need to check them.

[alyssa]

Hi,

i make a only-usb setting. but still get same problem.

(nothing is changed, all the code is generated by STM32CubeMX  6.8.0.)

[FBL]

As suggested @TDK , please share your schematics or try to reproduce on reference board so that we might help you investigate further. Try to update all your SW tools.