Re: [Paparazzi-devel] operation / flashing lisa/m

[Piotr Esden-Tempski]

As Felix mentioned using JTAG/SWD is the nicest solution. The way I do it is 
having a JTAG cable connected to the header and hang out of the airframe for 
quick programming. Then you don't have to mess around with power supply at all.
If you have to use USB programming. You could desolder the diode D3, then you 
plug in USB and connect the power to your BEC second. This way the mcu will 
detect the usb connector but you will not push power back into the BEC. The 
third solution is add a reverse polarity protection circuit between your BEC 
and Lisa/M. Either a diode that can handle the 200mA - 300mA depending on how 
much you have connected to Lisa/M or similar.

I hope this helps.

Cheers,
Piotr

On Jun 10, 2014, at 7:13, Felix Ruess <address@hidden> wrote:

> Hi Oswald,
> 
> if you want to flash via USB bootloader, there is currently no way around 
> this that I know of..
> But you could instead flash via JTAG or SWD (e.g. using FlossJTAG or 
> BlackMagicProbe).
> I can really recommend the BlackMagicProbe, it's great for development and 
> debugging.
> 
> Cheers, Felix
> 
> 
> On Tue, Jun 10, 2014 at 12:08 PM, Oswald Berthold <address@hidden> wrote:
> 
> hi all again,
> 
> a few questions regarding flashing of the AP board:
> 
> flashing seems a bit awkward, the way i do it now is
>  - unplug UBEC from servo ports
>  - plug in micro USB
>  - upload firmware
>  - unplug USB
>  - replug UBEC
> 
> is there a way of connecting both USB and external power supply to lisa?
> i have the POWER_FROM_SERVO jumper closed. is there a way for getting
> the AP into upload mode with a soft command, that is, go from normal
> operation into bootloader mode?
> 
> 
> regards, opt
> 
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