STM32U5 - USB CDC UART not working

[velmuruganbel]

STM32U575VIT6Q
Configured USB_OTG_FS to Device only mode and further configured ThreadX and USBX..

But when running the code it always get stuck at this Memory insufficient error..

[AScha.3 · Accepted solution]

at which size you set it ?

(for host) i set pool size 0x8000 , stack size 24*1024 B.

[velmuruganbel]

Hi @AScha.3 ,

Thanks for your response.

I set pool size as 0x8000 and stack size as 24*1024, but still the firmware stuck at the Memory insufficient error..
Can you share me your configurations? or your code for my reference with only USB peripheral active..

[AScha.3]

sharing my code would not help you, it has nothing in common with your project, except using this Azure/usbx.

but i see, in your debug pic , pool start - end = 512 B. thats not enough. i have 24KB here.

see:

but you set Application thread stack size also to 24K. try set this at 1024 (as i did).

and read the info, cube is giving : (we hope, its right...)

[velmuruganbel]

Hi @AScha.3 ,

Thanks for your response.

I changed configuration as follows and it resolved the memory allocation issue. But, the USB is not detected on the device manager on the PC. Not sure if i am missing anything else. Let me know if you have any suggestions. Thanks a lot for your support.
UXDevice memory pool size = 1024*26
USBX Device System Stack Size = 1024*22
USBX Device Application Thread Stack Size = 1024

[velmuruganbel]

My STM32 project file is placed on the below link,

https://drive.google.com/file/d/1cgsYnBItklQ5ghDTIzFgrIrc8Wn5GlTJ/view?usp=sharing

[AScha.3]

well, after about 50 hours try+debug , i got it almost running (audio host).... :expressionless_face:

look at example , maybe you can find something, thats missing in your code:

https://github.com/STMicroelectronics/STM32CubeU5/tree/7942fc4ea05026e4e9ce72d680f704e9433bce42/Projects/NUCLEO-U575ZI-Q/Applications/USBX/Ux_Device_CDC_ACM

usb doing "nothing" - i found, on my chip (H563zit) usb-vdd power was NOT enabled ! so it will never do anything on the usb-lines ;  needed : 

/* Drive vbus */

USBH_DriverVBUS(USB_VBUS_TRUE);