[libopenstm32-devel] stm32f103 and USB

[gwenhael.goavec <gwe...@fe...>]

Hi,

I have a custom board based on STM32F103 microcontroller.
My toolchain is created thanks to summon-arm-toolchain script.
I work with linux.

I wish to use the usb device. In a first time, I have used 
examples shipped with library.

With cdcacm or usbhid (maybe with others too), I have errors when I plug the usb
cable. 
dmesg exemple for usb_hid.elf:

[167604.696192] usb 3-1: new full speed USB device using uhci_hcd and address 21
[167609.843315] usb 3-1: unable to read config index 0 descriptor/start: -110
[167609.843326] usb 3-1: chopping to 0 config(s)
[167614.845496] usb 3-1: string descriptor 0 read error: -71
[167614.845519] usb 3-1: New USB device found, idVendor=0483, idProduct=5710
[167614.845531] usb 3-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3 [167614.845879] usb 3-1: no configuration chosen from 0 choices
. 
lsusb shows the good informations about VendorId and ProductId. 
On a other side lsusb -v show bNumConfigurations : 0

Bus 003 Device 012: ID 0483:5710 SGS Thomson Microelectronics 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0483 SGS Thomson Microelectronics
  idProduct          0x5710 
  bcdDevice            2.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      0

To test if problem is relative to my board or an other problem, I have used
prebuild usbmouse demo available on olimex's website. With this example, I have
the good result.

I have no idea of reasons of this problem, maybe my arm-none-eabi-gcc-4.5.1
If someone has an idea to correct this issue.

Thank you very much.