Re: [libopenstm32-devel] stm32f103 and USB

[Gareth M. <ga...@bl...>]

Ok, there seems to be a lurking bug in the USB code.  You aren't the
first person to have this problem.  I unfortunately can't reproduce the
problem with either of the two hosts I have available.

If you can take a capture of the usb activity with Wireshark, I'll
have a look at it to see what I can find.

Regards,
Gareth

On Wed, Feb 16, 2011 at 1:31 AM, gwenhael.goavec
<gwe...@fe...> wrote:
> 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.
>
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