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

From: James Spezeski
Subject: Re: [Paparazzi-devel] Re: trouble getting started...
Date: Thu, 20 Jan 2011 17:36:14 -0700

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?


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?


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.


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