Re: [libopenstm32-devel] STM32F Connectivity line, USB Bootloader and HSE crystal Frequency

[Jan P. <jan...@gm...>]

Hi,

I think there is the possibility to select different internal clocks and
output them on a pin. That way you can measure the frequency and check
if it's ok for USB.
> Hello,
>
> on my STM32F107 board, the USB bootloader enumerates much faster with a 25
> MHz crystal then with a 8 MHz crystal. With the 8 MHz crystal, there are
> several unseuccessfull attempts like:
>
> Jul 11 20:27:34 hertz kernel: [35078.633123] hub 1-1:1.0: unable to enumerate USB device on port 1
> Jul 11 20:27:34 hertz kernel: [35079.024836] usb 1-1.1: new full speed USB device using ehci_hcd and address 20
> Jul 11 20:27:34 hertz kernel: [35079.096942] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:34 hertz kernel: [35079.272932] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:34 hertz kernel: [35079.448542] usb 1-1.1: new full speed USB device using ehci_hcd and address 21
> Jul 11 20:27:35 hertz kernel: [35079.520403] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:35 hertz kernel: [35079.696887] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:35 hertz kernel: [35079.872366] usb 1-1.1: new full speed USB device using ehci_hcd and address 22
> Jul 11 20:27:35 hertz kernel: [35080.280050] usb 1-1.1: device not accepting address 22, error -32
> Jul 11 20:27:35 hertz kernel: [35080.352571] usb 1-1.1: new full speed USB device using ehci_hcd and address 23
> Jul 11 20:27:36 hertz kernel: [35080.760031] usb 1-1.1: device not accepting address 23, error -32
> Jul 11 20:27:36 hertz kernel: [35080.760406] hub 1-1:1.0: unable to enumerate USB device on port 1
> Jul 11 20:27:40 hertz kernel: [35084.912351] usb 1-1.1: new full speed USB device using ehci_hcd and address 24
> Jul 11 20:27:40 hertz kernel: [35084.984331] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:40 hertz kernel: [35085.160821] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:40 hertz kernel: [35085.336555] usb 1-1.1: new full speed USB device using ehci_hcd and address 25
> Jul 11 20:27:40 hertz kernel: [35085.408543] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:41 hertz kernel: [35085.584900] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:41 hertz kernel: [35085.760503] usb 1-1.1: new full speed USB device using ehci_hcd and address 26
> Jul 11 20:27:41 hertz kernel: [35086.168037] usb 1-1.1: device not accepting address 26, error -32
> Jul 11 20:27:41 hertz kernel: [35086.240459] usb 1-1.1: new full speed USB device using ehci_hcd and address 27
> Jul 11 20:27:42 hertz kernel: [35086.648047] usb 1-1.1: device not accepting address 27, error -32
> Jul 11 20:27:42 hertz kernel: [35086.648428] hub 1-1:1.0: unable to enumerate USB device on port 1
> Jul 11 20:27:44 hertz kernel: [35089.264398] usb 1-1.1: new full speed USB device using ehci_hcd and address 28
> Jul 11 20:27:44 hertz kernel: [35089.336639] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:45 hertz kernel: [35089.512870] usb 1-1.1: device descriptor read/64, error -32
> Jul 11 20:27:45 hertz kernel: [35089.688480] usb 1-1.1: new full speed USB device using ehci_hcd and address 29
> Jul 11 20:27:45 hertz kernel: [35089.781713] usb 1-1.1: New USB device found, idVendor=0483, idProduct=df11
> Jul 11 20:27:45 hertz kernel: [35089.781722] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> Jul 11 20:27:45 hertz kernel: [35089.781728] usb 1-1.1: Product: STM32 0x418 DFU Bootloade
> Jul 11 20:27:45 hertz kernel: [35089.781733] usb 1-1.1: Manufacturer: STMicroelectronics
> Jul 11 20:27:45 hertz kernel: [35089.781737] usb 1-1.1: SerialNumber: STM32
>
> Is this expected behaviour? Is my 8 MHaz crystal broken?
>
> Thanks