cubemx + usb vcp and stm32f4?

[John Doe1]

Posted on February 24, 2017 at 17:51

hey,

I tried to run usb hs + vcp with code created by CubeMX.

In generated code i have changed:

#define APP_RX_DATA_SIZE 64

#define APP_TX_DATA_SIZE 64

and included in main.c:

#include 'usbd_cdc_if.h'

also changed:

Stack_Size EQU     0x00004000

Heap_Size      EQU     0x00002000

and no luck at all. When pluging in usb cable i got message in linux:

usb 1-1: new full-speed USB device number 80 using xhci_hcd

usb 1-1: device descriptor read/64, error -71usb 1-1: device descriptor read/64, error -71usb 1-1: new full-speed USB device number 81 using xhci_hcdusb 1-1: device descriptor read/64, error -71usb 1-1: device descriptor read/64, error -71usb 1-1: new full-speed USB device number 82 using xhci_hcdusb 1-1: Device not responding to setup address.usb 1-1: Device not responding to setup address.usb 1-1: device not accepting address 82, error -71usb 1-1: new full-speed USB device number 83 using xhci_hcdusb 1-1: Device not responding to setup address.usb 1-1: Device not responding to setup address.usb 1-1: device not accepting address 83, error -71usb usb1-port1: unable to enumerate USB device

Under Windows it recognizes as wrong device (it's not related to driver)

any hints how to run usb hs with vcp?

thanks!

[allard]

Posted on February 24, 2017 at 20:01

Maybe a hardware problem? Does another USB class work?

[John Doe1]

Posted on February 25, 2017 at 16:57

unfortunately no, tried three different boards on the different computers.

[gbm · Accepted solution]

Posted on February 27, 2017 at 11:48

Check the Configuration tab, USB_OTG_FS Configuration, VBUS sensing - must be set do Disable. I don't really know why CubeMX sets it to Enable by default.