Re: [Paparazzi-devel] No USB device error

[Augustin Boisvert]

Hello !

I'm coming with same type issue, but a little bit more vicious. I have
some boards (booz and twog) that can be uploaded on some PCs, but do
not work on others. But every PC doesn't work with every autopilot.

Does somebody had the same problem ? How can I fix it ?

thanks

AB.

On Tue, Jul 27, 2010 at 08:33, Marko Thaler <address@hidden> wrote:
> Yes, I first plug the mini USB on the Booz main board, than the other end of
> the USB cable into my computer, and than I apply the power to the main
> board. Nothing else is connected to the main board.
> Marko
>
> On Jul 27, 2010, at 3:33 AM, <address@hidden>
> <address@hidden> wrote:
>
> just to be clear, you have the USB cable plugged into the main board and the
> computer prior to applying power to the board?
> AJ
>
> -------- Original Message --------
> Subject: Re: [Paparazzi-devel] No USB device error
> From: Marko Thaler <address@hidden>
> Date: Mon, July 26, 2010 3:47 pm
> To: address@hidden
>
> Hello Anton,
> I apologize for not being clear about my power supply. I power Booz with
> adjustable power supply connected to the +- pads. At 10V the current is
> 0.04A, which is OK.
> I mentioned the USB input voltage just to stress that the LPC should get the
> signal to wait for programming through USB (first connecting the USB, than
> the power supply). In any case dmesg should show the new USB device
> connected message, but it does not!
> Thank you for your help,
> Marko
>
>
> On Jul 26, 2010, at 11:58 PM, <address@hidden> wrote:
>
> The booz board cannot be powered through 5V.  The actual power pin is not
> routed to the board, its simply routed to detect the presence at power on.
> You must power the board from another source.  The best source would be from
> the + and - pads on the board.  Anythign right around 12V would be great.
>
> -------- Original Message --------
> Subject: [Paparazzi-devel] No USB device error
> From: Marko Thaler <address@hidden>
> Date: Mon, July 26, 2010 1:23 pm
> To: address@hidden
>
> Hello everybody,
>
> I am testing a newly assembled Booz main board. Loading the USB Boot Loader
> went smoothly.
>
> However, when I try to program it through USB, I get a no USB device error.
> USB access rights and device rules are OK. Dmesg and lsusb do not detect the
> board.
>
> I have tested all the mini-USB connections on the board and everything is
> fine. The board input voltage through USB is 5V (USB_VBUS), however
> USB_VBUS_3V3 line (P0.23 pin) has 0V - the voltage drop on R9 is 5V!
>
> Any suggestions what to try next?
>
> Thank you for your help.
>
> Kind regards,
>
> Marko
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