Re: [Paparazzi-devel] Re: trouble getting started...

[Chris Gough]

Hi James,

P0.14 of the TWOG V1.x is a label from the schematic diagram. I think
it's the same thing as the pin called "Boot" (pin number 4 of the
"Download/GPS" socket) on the pinout diagram.

Someone please correct me if that's wrong, I just use the "boot"
switch built into my ISP (custom unit that exists to flash autopilot
bootloaders); it "just works".

Chris Gough

On Fri, Jan 21, 2011 at 11:36 AM, James Spezeski
<address@hidden> wrote:
> I'm pretty sure the bootloader was flashed by the supplier, but I'm not sure
> that I didn't break it somehow.  I tried flashing it today but I was
> confused about a few things.
>
> The paparazzi website says that:
> "The Bootloader is uploaded through the serial interface UART0 (Serial1) by
> connecting certain point on the board to ground during power-up, sometimes
> referred to as: holding low. On the board Tiny V1.x pin P0.14, Tiny V2.x
> this pin is called BOOT). Also GPS_RESET has to be tied low during the
> serial programming to keep the GPS receiver quiet that shares the serial
> port with the download."
>
> What "certain point" on the twog must be connected to ground?
>
> Also, it says that for twog it says that the boot pin must be connected to
> ground, is this the serial converter ground?
>
> On Wed, Jan 19, 2011 at 12:30 PM, Martin Mueller <address@hidden> wrote:
>>
>> yes :-)
>>
>> Are you sure a USB bootloader was flashed and/or you did not overwrite it?
>> What commands did you issue?
>>
>> Martin
>>
>> On 19.01.2011 20:18, James Spezeski wrote:
>>>
>>> I just checked and there was 5V on the VBUS pin.  I also checked all the
>>> electrical connections from the pins on the USB connector (the one that
>>> plugs into my computer) to the solder joints on the TWOG, and they were
>>> all good.
>>>
>>> Should I try flashing the bootloader?
>>>
>>> James
>>>
>>> On Wed, Jan 19, 2011 at 4:25 AM, Martin Mueller <address@hidden
>>> <mailto:address@hidden>> wrote:
>>>
>>>    Hi Thomas,
>>>
>>>     > Maybe at least my second comment on the power consumption can help.
>>>
>>>    my statement regarding the "self power" was wrong - hope that does
>>>    not confuse. The Vbus pin only switches the bootloader on, any
>>>    LPC2148 board does not consume a noteable current through USB. They
>>>    actually are self powered, not bus powered.
>>>
>>>    Martin
>>>
>>>
>>>
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